diff --git a/.github/workflows/dependencies b/.github/workflows/dependencies
index f9af29f..980cf39 100644
--- a/.github/workflows/dependencies
+++ b/.github/workflows/dependencies
@@ -1,3 +1,4 @@
 CategoryTree
 Disambiguator
+PageViewInfo
 Wikibase
diff --git a/.phan/config.php b/.phan/config.php
index f59ba0b..6489702 100644
--- a/.phan/config.php
+++ b/.phan/config.php
@@ -7,6 +7,7 @@
 	[
 		'../../extensions/CategoryTree',
 		'../../extensions/Disambiguator',
+		'../../extensions/PageViewInfo',
 		'../../extensions/Wikibase',
 	]
 );
@@ -16,6 +17,7 @@
 	[
 		'../../extensions/CategoryTree',
 		'../../extensions/Disambiguator',
+		'../../extensions/PageViewInfo',
 		'../../extensions/Wikibase',
 	]
 );
diff --git a/composer.json b/composer.json
index ee525ae..ff2b176 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,9 @@
 {
   "name": "femiwiki/unified-extension-for-femiwiki",
   "description": "an extension for femiwiki.",
+  "require": {
+    "google/apiclient": "^2.9"
+  },
   "require-dev": {
     "mediawiki/mediawiki-codesniffer": "36.0.0",
     "mediawiki/mediawiki-phan-config": "0.10.6",
diff --git a/composer.lock b/composer.lock
index 15647e0..1f9e306 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,21 +4,1048 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "362089d66fbda2095c9870fa3f3f015d",
-    "packages": [],
+    "content-hash": "dbd480929684b6451ebbc666dab907c8",
+    "packages": [
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+            "name": "firebase/php-jwt",
+            "version": "v5.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/firebase/php-jwt.git",
+                "reference": "3c2d70f2e64e2922345e89f2ceae47d2463faae1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/firebase/php-jwt/zipball/3c2d70f2e64e2922345e89f2ceae47d2463faae1",
+                "reference": "3c2d70f2e64e2922345e89f2ceae47d2463faae1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": ">=4.8 <=9"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Firebase\\JWT\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Neuman Vong",
+                    "email": "neuman+pear@twilio.com",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Anant Narayanan",
+                    "email": "anant@php.net",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A simple library to encode and decode JSON Web Tokens (JWT) in PHP. Should conform to the current spec.",
+            "homepage": "https://github.com/firebase/php-jwt",
+            "keywords": [
+                "jwt",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/firebase/php-jwt/issues",
+                "source": "https://github.com/firebase/php-jwt/tree/v5.3.0"
+            },
+            "time": "2021-05-20T17:37:02+00:00"
+        },
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+            "name": "google/apiclient",
+            "version": "v2.9.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/googleapis/google-api-php-client.git",
+                "reference": "e9ef4c26a044b8d39a46bcf296be795fe24a1849"
+            },
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+                "reference": "e9ef4c26a044b8d39a46bcf296be795fe24a1849",
+                "shasum": ""
+            },
+            "require": {
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+                "google/apiclient-services": "~0.13",
+                "google/auth": "^1.10",
+                "guzzlehttp/guzzle": "~5.3.3||~6.0||~7.0",
+                "guzzlehttp/psr7": "^1.2",
+                "monolog/monolog": "^1.17|^2.0",
+                "php": "^5.6|^7.0|^8.0",
+                "phpseclib/phpseclib": "~2.0||^3.0.2"
+            },
+            "require-dev": {
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+                "composer/composer": "^1.10.22",
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
+                "phpcompatibility/php-compatibility": "^9.2",
+                "phpunit/phpunit": "^5.7||^8.5.13",
+                "squizlabs/php_codesniffer": "~2.3",
+                "symfony/css-selector": "~2.1",
+                "symfony/dom-crawler": "~2.1"
+            },
+            "suggest": {
+                "cache/filesystem-adapter": "For caching certs and tokens (using Google\\Client::setCache)"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.x-dev"
+                }
+            },
+            "autoload": {
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+                    "Google\\": "src/"
+                },
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+                    "src/aliases.php"
+                ],
+                "classmap": [
+                    "src/aliases.php"
+                ]
+            },
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+            "license": [
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+            "homepage": "http://developers.google.com/api-client-library/php",
+            "keywords": [
+                "google"
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+                "issues": "https://github.com/googleapis/google-api-php-client/issues",
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+            },
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+        },
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+                "php": ">=5.4",
+                "psr/cache": "^1.0",
+                "psr/http-message": "^1.0"
+            },
+            "require-dev": {
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+                "phpunit/phpunit": "^4.8.36|^5.7",
+                "sebastian/comparator": ">=1.2.3",
+                "squizlabs/php_codesniffer": "^3.5"
+            },
+            "suggest": {
+                "phpseclib/phpseclib": "May be used in place of OpenSSL for signing strings or for token management. Please require version ^2."
+            },
+            "type": "library",
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+                }
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+            "keywords": [
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+                "google",
+                "oauth2"
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+                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
+                "psr/log": "Required for using the Log middleware"
+            },
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+                    "homepage": "https://github.com/mtdowling"
+                },
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+                    "email": "mark.sagikazar@gmail.com",
+                    "homepage": "https://sagikazarmark.hu"
+                }
+            ],
+            "description": "Guzzle is a PHP HTTP client library",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
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+                "psr-7",
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+                "web service"
+            ],
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+                "source": "https://github.com/guzzle/guzzle/tree/7.3.0"
+            },
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+                    "url": "https://github.com/GrahamCampbell",
+                    "type": "github"
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+                    "type": "github"
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+                    "homepage": "https://github.com/mtdowling"
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+            "description": "Guzzle promises library",
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+        },
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+            },
+            "type": "library",
+            "extra": {
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+                }
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+                "files": [
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+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Tobias Schultze",
+                    "homepage": "https://github.com/Tobion"
+                }
+            ],
+            "description": "PSR-7 message implementation that also provides common utility methods",
+            "keywords": [
+                "http",
+                "message",
+                "psr-7",
+                "request",
+                "response",
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+                "uri",
+                "url"
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+            "support": {
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+                "source": "https://github.com/guzzle/psr7/tree/1.8.2"
+            },
+            "time": "2021-04-26T09:17:50+00:00"
+        },
+        {
+            "name": "monolog/monolog",
+            "version": "2.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Seldaek/monolog.git",
+                "reference": "1cb1cde8e8dd0f70cc0fe51354a59acad9302084"
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+                "php-amqplib/php-amqplib": "Allow sending log messages to an AMQP server using php-amqplib",
+                "php-console/php-console": "Allow sending log messages to Google Chrome",
+                "rollbar/rollbar": "Allow sending log messages to Rollbar",
+                "ruflin/elastica": "Allow sending log messages to an Elastic Search server"
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+            "type": "library",
+            "extra": {
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+            "autoload": {
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "email": "j.boggiano@seld.be",
+                    "homepage": "https://seld.be"
+                }
+            ],
+            "description": "Sends your logs to files, sockets, inboxes, databases and various web services",
+            "homepage": "https://github.com/Seldaek/monolog",
+            "keywords": [
+                "log",
+                "logging",
+                "psr-3"
+            ],
+            "support": {
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+            },
+            "funding": [
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+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/monolog/monolog",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-12-14T13:15:25+00:00"
+        },
+        {
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+            "version": "v2.4.0",
+            "source": {
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+                },
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+                    "name": "Steve 'Sc00bz' Thomas",
+                    "email": "steve@tobtu.com",
+                    "homepage": "https://www.tobtu.com",
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+            ],
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+                "base32",
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+                "base32_encode",
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+        },
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+            },
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+            "notification-url": "https://packagist.org/downloads/",
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+                    "homepage": "https://paragonie.com"
+                }
+            ],
+            "description": "PHP 5.x polyfill for random_bytes() and random_int() from PHP 7",
+            "keywords": [
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+                "polyfill",
+                "pseudorandom",
+                "random"
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+        },
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+                "ext-mcrypt": "Install the Mcrypt extension in order to speed up a few other cryptographic operations.",
+                "ext-openssl": "Install the OpenSSL extension in order to speed up a wide variety of cryptographic operations."
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+                },
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+                    "email": "pm@datasphere.ch",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Andreas Fischer",
+                    "email": "bantu@phpbb.com",
+                    "role": "Developer"
+                },
+                {
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+                    "email": "petrich@tronic-media.com",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Graham Campbell",
+                    "email": "graham@alt-three.com",
+                    "role": "Developer"
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+            "description": "PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc.",
+            "homepage": "http://phpseclib.sourceforge.net",
+            "keywords": [
+                "BigInteger",
+                "aes",
+                "asn.1",
+                "asn1",
+                "blowfish",
+                "crypto",
+                "cryptography",
+                "encryption",
+                "rsa",
+                "security",
+                "sftp",
+                "signature",
+                "signing",
+                "ssh",
+                "twofish",
+                "x.509",
+                "x509"
+            ],
+            "support": {
+                "issues": "https://github.com/phpseclib/phpseclib/issues",
+                "source": "https://github.com/phpseclib/phpseclib/tree/3.0.8"
+            },
+            "funding": [
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+                    "type": "github"
+                },
+                {
+                    "url": "https://www.patreon.com/phpseclib",
+                    "type": "patreon"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/phpseclib/phpseclib",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2021-04-19T03:20:48+00:00"
+        },
+        {
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+            "version": "1.0.1",
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+                "url": "https://github.com/php-fig/cache.git",
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+            "autoload": {
+                "psr-4": {
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for caching libraries",
+            "keywords": [
+                "cache",
+                "psr",
+                "psr-6"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/cache/tree/master"
+            },
+            "time": "2016-08-06T20:24:11+00:00"
+        },
+        {
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+            "version": "1.0.1",
+            "source": {
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+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621"
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+            "require": {
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+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
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+            "autoload": {
+                "psr-4": {
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-client/tree/master"
+            },
+            "time": "2020-06-29T06:28:15+00:00"
+        },
+        {
+            "name": "psr/http-message",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message.git",
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+            "extra": {
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+                    "dev-master": "1.0.x-dev"
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+            "autoload": {
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            "authors": [
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+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP messages",
+            "homepage": "https://github.com/php-fig/http-message",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-message/tree/master"
+            },
+            "time": "2016-08-06T14:39:51+00:00"
+        },
+        {
+            "name": "psr/log",
+            "version": "1.1.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log.git",
+                "reference": "d49695b909c3b7628b6289db5479a1c204601f11"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/d49695b909c3b7628b6289db5479a1c204601f11",
+                "reference": "d49695b909c3b7628b6289db5479a1c204601f11",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Log\\": "Psr/Log/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "homepage": "https://github.com/php-fig/log",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/log/tree/1.1.4"
+            },
+            "time": "2021-05-03T11:20:27+00:00"
+        },
+        {
+            "name": "ralouphie/getallheaders",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ralouphie/getallheaders.git",
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+                "type": "zip",
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+                "shasum": ""
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+            "require": {
+                "php": ">=5.6"
+            },
+            "require-dev": {
+                "php-coveralls/php-coveralls": "^2.1",
+                "phpunit/phpunit": "^5 || ^6.5"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/getallheaders.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ralph Khattar",
+                    "email": "ralph.khattar@gmail.com"
+                }
+            ],
+            "description": "A polyfill for getallheaders.",
+            "support": {
+                "issues": "https://github.com/ralouphie/getallheaders/issues",
+                "source": "https://github.com/ralouphie/getallheaders/tree/develop"
+            },
+            "time": "2019-03-08T08:55:37+00:00"
+        }
+    ],
     "packages-dev": [
         {
             "name": "composer/semver",
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                 "url": "https://github.com/composer/semver.git",
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-                "reference": "a02fdf930a3c1c3ed3a49b5f63859c0c20e10464",
+                "url": "https://api.github.com/repos/composer/semver/zipball/31f3ea725711245195f62e54ffa402d8ef2fdba9",
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             },
             "require": {
@@ -67,6 +1094,11 @@
                 "validation",
                 "versioning"
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+            "support": {
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+                "issues": "https://github.com/composer/semver/issues",
+                "source": "https://github.com/composer/semver/tree/3.2.5"
+            },
             "funding": [
                 {
                     "url": "https://packagist.com",
@@ -81,7 +1113,7 @@
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-            "time": "2020-11-13T08:59:24+00:00"
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         },
         {
             "name": "composer/spdx-licenses",
@@ -141,6 +1173,11 @@
                 "spdx",
                 "validator"
             ],
+            "support": {
+                "irc": "irc://irc.freenode.org/composer",
+                "issues": "https://github.com/composer/spdx-licenses/issues",
+                "source": "https://github.com/composer/spdx-licenses/tree/1.5.5"
+            },
             "funding": [
                 {
                     "url": "https://packagist.com",
@@ -200,6 +1237,11 @@
                 "Xdebug",
                 "performance"
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+            "support": {
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+                "issues": "https://github.com/composer/xdebug-handler/issues",
+                "source": "https://github.com/composer/xdebug-handler/tree/1.4.6"
+            },
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@@ -218,20 +1260,20 @@
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         {
             "name": "felixfbecker/advanced-json-rpc",
-            "version": "v3.2.0",
+            "version": "v3.2.1",
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                 "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
-                "reference": "06f0b06043c7438959dbdeed8bb3f699a19be22e"
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-                "reference": "06f0b06043c7438959dbdeed8bb3f699a19be22e",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447",
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             },
             "require": {
-                "netresearch/jsonmapper": "^1.0 || ^2.0",
+                "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
                 "php": "^7.1 || ^8.0",
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@@ -255,7 +1297,11 @@
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             "description": "A more advanced JSONRPC implementation",
-            "time": "2021-01-10T17:48:47+00:00"
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-advanced-json-rpc/issues",
+                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/v3.2.1"
+            },
+            "time": "2021-06-11T22:34:44+00:00"
         },
         {
             "name": "mediawiki/mediawiki-codesniffer",
@@ -302,6 +1348,9 @@
                 "codesniffer",
                 "mediawiki"
             ],
+            "support": {
+                "source": "https://github.com/wikimedia/mediawiki-tools-codesniffer/tree/v36.0.0"
+            },
             "time": "2021-04-29T02:21:21+00:00"
         },
         {
@@ -349,6 +1398,10 @@
             ],
             "description": "Standard MediaWiki phan configuration",
             "homepage": "https://www.mediawiki.org/wiki/Continuous_integration/Phan",
+            "support": {
+                "issues": "https://github.com/wikimedia/mediawiki-tools-phan/issues",
+                "source": "https://github.com/wikimedia/mediawiki-tools-phan/tree/0.10.6"
+            },
             "time": "2020-12-14T15:30:53+00:00"
         },
         {
@@ -395,6 +1448,9 @@
             ],
             "description": "Removes executable bit from files that shouldn't be executable",
             "homepage": "https://www.mediawiki.org/wiki/MinusX",
+            "support": {
+                "source": "https://github.com/wikimedia/mediawiki-tools-minus-x/tree/1.1.1"
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             "time": "2021-01-06T01:11:18+00:00"
         },
         {
@@ -459,6 +1515,12 @@
                 "static",
                 "taint"
             ],
+            "support": {
+                "irc": "irc://freenode.net/wikimedia-dev",
+                "issues": "https://phabricator.wikimedia.org/maniphest/task/edit/form/1/?projects=securitycheckplugin",
+                "source": "https://phabricator.wikimedia.org/diffusion/MTPS/",
+                "wiki": "https://www.mediawiki.org/wiki/SecurityCheckPlugin"
+            },
             "time": "2020-12-14T11:11:43+00:00"
         },
         {
@@ -500,20 +1562,24 @@
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             ],
             "description": "Tolerant PHP-to-AST parser designed for IDE usage scenarios",
+            "support": {
+                "issues": "https://github.com/microsoft/tolerant-php-parser/issues",
+                "source": "https://github.com/microsoft/tolerant-php-parser/tree/v0.0.23"
+            },
             "time": "2020-09-13T17:29:12+00:00"
         },
         {
             "name": "netresearch/jsonmapper",
-            "version": "v2.1.0",
+            "version": "v3.1.1",
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-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/d15da7ba4957ffb8f1747218be9e1a121fd298a1",
-                "reference": "d15da7ba4957ffb8f1747218be9e1a121fd298a1",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/f040a30e04b57fbcc9c6cbcf4dbaa96bd318b9bb",
+                "reference": "f040a30e04b57fbcc9c6cbcf4dbaa96bd318b9bb",
                 "shasum": ""
             },
             "require": {
                 "php": ">=7.2.5",
-                "psr/container": "^1.0"
+                "psr/container": "^1.1"
             },
             "suggest": {
                 "symfony/service-implementation": ""
@@ -1703,7 +2858,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.2-dev"
+                    "dev-main": "2.4-dev"
                 },
                 "thanks": {
                     "name": "symfony/contracts",
@@ -1739,6 +2894,9 @@
                 "interoperability",
                 "standards"
             ],
+            "support": {
+                "source": "https://github.com/symfony/service-contracts/tree/v2.4.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -1753,20 +2911,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-09-07T11:33:47+00:00"
+            "time": "2021-04-01T10:43:52+00:00"
         },
         {
             "name": "symfony/string",
-            "version": "v5.2.6",
+            "version": "v5.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/string.git",
-                "reference": "ad0bd91bce2054103f5eaa18ebeba8d3bc2a0572"
+                "reference": "a9a0f8b6aafc5d2d1c116dcccd1573a95153515b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/string/zipball/ad0bd91bce2054103f5eaa18ebeba8d3bc2a0572",
-                "reference": "ad0bd91bce2054103f5eaa18ebeba8d3bc2a0572",
+                "url": "https://api.github.com/repos/symfony/string/zipball/a9a0f8b6aafc5d2d1c116dcccd1573a95153515b",
+                "reference": "a9a0f8b6aafc5d2d1c116dcccd1573a95153515b",
                 "shasum": ""
             },
             "require": {
@@ -1819,6 +2977,9 @@
                 "utf-8",
                 "utf8"
             ],
+            "support": {
+                "source": "https://github.com/symfony/string/tree/v5.3.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -1833,7 +2994,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-03-17T17:12:15+00:00"
+            "time": "2021-05-26T17:43:10+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -1887,6 +3048,10 @@
                 "check",
                 "validate"
             ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+            },
             "time": "2021-03-09T10:59:23+00:00"
         }
     ],
@@ -1897,5 +3062,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "1.1.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/extension.json b/extension.json
index 4f8b7b2..6f20040 100644
--- a/extension.json
+++ b/extension.json
@@ -36,9 +36,10 @@
     "BeforePageDisplay": "default",
     "HtmlPageLinkRendererBegin": "default",
     "LinkerMakeExternalLink": "default",
+    "OutputPageParserOutput": "RelatedArticles",
+    "PageViewInfoAfterPageViewService": "MediaWiki\\Extension\\UnifiedExtensionForFemiwiki\\Hooks\\PageViewInfoHandler::onPageViewInfoAfterPageViewService",
     "SidebarBeforeOutput": "default",
-    "SkinAddFooterLinks": "default",
-    "OutputPageParserOutput": "RelatedArticles"
+    "SkinAddFooterLinks": "default"
   },
   "SpecialPages": {
     "OrderedWhatlinkshere": {
@@ -58,10 +59,20 @@
   "config": {
     "GoogleAnalyticsTrackingID": {
       "value": ""
+    },
+    "UnifiedExtensionForFemiwikiGoogleAnalyticsCredentialsFile": {
+      "value": false,
+      "description": "The file name of the credentials from the Google API Console."
+    },
+    "UnifiedExtensionForFemiwikiGoogleAnalyticsProfileId": {
+      "value": false,
+      "description": "Profile(View) ID of the Google Analytics View. You can use the Account Explorer to find a View ID"
     }
   },
+  "load_composer_autoloader": true,
   "TestAutoloadNamespaces": {
-    "MediaWiki\\Extension\\UnifiedExtensionForFemiwiki\\Tests\\Unit\\": "tests/phpunit/unit/"
+    "MediaWiki\\Extension\\UnifiedExtensionForFemiwiki\\Tests\\Unit\\": "tests/phpunit/unit/",
+    "MediaWiki\\Extension\\UnifiedExtensionForFemiwiki\\Tests\\Integration\\": "tests/phpunit/integration/"
   },
   "manifest_version": 2
 }
diff --git a/includes/GoogleAnalyticsPageViewService.php b/includes/GoogleAnalyticsPageViewService.php
new file mode 100644
index 0000000..de80cb5
--- /dev/null
+++ b/includes/GoogleAnalyticsPageViewService.php
@@ -0,0 +1,345 @@
+<?php
+
+namespace MediaWiki\Extension\UnifiedExtensionForFemiwiki;
+
+use Google_Client;
+use Google_Service_AnalyticsReporting;
+use Google_Service_AnalyticsReporting_DateRange;
+use Google_Service_AnalyticsReporting_Dimension;
+use Google_Service_AnalyticsReporting_DimensionFilter;
+use Google_Service_AnalyticsReporting_DimensionFilterClause;
+use Google_Service_AnalyticsReporting_GetReportsRequest;
+use Google_Service_AnalyticsReporting_Metric;
+use Google_Service_AnalyticsReporting_OrderBy;
+use Google_Service_AnalyticsReporting_ReportRequest;
+use InvalidArgumentException;
+use MediaWiki\Extensions\PageViewInfo\PageViewService;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
+use RuntimeException;
+use Status;
+use StatusValue;
+use Title;
+use WebRequest;
+
+/**
+ * PageViewService implementation for wikis using the Google Analytics
+ * @see https://developers.google.com/analytics
+ */
+class GoogleAnalyticsPageViewService implements PageViewService, LoggerAwareInterface {
+	/** @var LoggerInterface */
+	protected $logger;
+
+	/** @var Google_Service_AnalyticsReporting */
+	protected $analytics;
+
+	/** @var string Profile(View) ID of the Google Analytics View. */
+	protected $profileId;
+
+	/** @var int UNIX timestamp of 0:00 of the last day with complete data */
+	protected $lastCompleteDay;
+
+	/** @var array Cache for getEmptyDateRange() */
+	protected $range;
+
+	/** @var WebRequest|string[] The request that asked for this data; see the originalRequest
+	 *    parameter of Http::request()
+	 */
+	protected $originalRequest;
+
+	/**
+	 * @param array $options Associative array.
+	 */
+	public function __construct( array $options ) {
+		$this->verifyApiOptions( $options );
+
+		// Skip the current day for which only partial information is available
+		$this->lastCompleteDay = strtotime( '0:0 1 day ago' );
+
+		$this->logger = new NullLogger();
+
+		$client = new Google_Client();
+		$client->setApplicationName( 'PageViewInfo' );
+		if ( $options['credentialsFile'] ) {
+			$client->setAuthConfig( $options['credentialsFile'] );
+		}
+		$client->addScope( Google_Service_AnalyticsReporting::ANALYTICS_READONLY );
+
+		$this->analytics = new Google_Service_AnalyticsReporting( $client );
+
+		$this->profileId = $options['profileId'];
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function setLogger( LoggerInterface $logger ) {
+		$this->logger = $logger;
+	}
+
+	/**
+	 * @param WebRequest|string[] $originalRequest See the 'originalRequest' parameter of
+	 *   Http::request().
+	 */
+	public function setOriginalRequest( $originalRequest ) {
+		$this->originalRequest = $originalRequest;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function supports( $metric, $scope ) {
+		return true;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getPageData( array $titles, $days, $metric = self::METRIC_VIEW ) {
+		if ( !$titles ) {
+			return StatusValue::newGood( [] );
+		}
+		if ( $days <= 0 ) {
+			throw new InvalidArgumentException( 'Invalid days: ' . $days );
+		}
+
+		$status = StatusValue::newGood();
+		$result = [];
+		foreach ( $titles as $title ) {
+			/** @var Title $title */
+			$result[$title->getPrefixedDBkey()] = $this->getEmptyDateRange( $days );
+
+			// Create the DateRange object.
+			$dateRange = new Google_Service_AnalyticsReporting_DateRange();
+			$dateRange->setStartDate( $days . 'daysAgo' );
+			$dateRange->setEndDate( "1daysAgo" );
+
+			// Create the Metrics object.
+			$gaMetric = new Google_Service_AnalyticsReporting_Metric();
+			if ( $metric === self::METRIC_VIEW ) {
+				$gaMetric->setExpression( 'ga:pageviews' );
+			} elseif ( $metric === self::METRIC_UNIQUE ) {
+				$gaMetric->setExpression( 'ga:uniquePageviews' );
+			} else {
+				throw new InvalidArgumentException( 'Invalid metric: ' . $metric );
+			}
+
+			// Create the Dimension object.
+			$dimension = new Google_Service_AnalyticsReporting_Dimension();
+			$dimension->setName( 'ga:date' );
+
+			// Create the DimensionFilterClause object.
+			// TODO Use unique custom dimension instead of ga:pageTitle and provide the instruction to the end-users.
+			$dimensionFilter = new Google_Service_AnalyticsReporting_DimensionFilter();
+			$dimensionFilter->setDimensionName( 'ga:pageTitle' );
+			$dimensionFilter->setOperator( 'REGEXP' );
+			$dimensionFilter->setExpressions( [
+				'^' . str_replace( '_', ' ', $title->getPrefixedDBkey() ) . ' - [^-]+$' ] );
+			$dimensionFilterClause = new Google_Service_AnalyticsReporting_DimensionFilterClause();
+			$dimensionFilterClause->setFilters( [ $dimensionFilter ] );
+
+			// Create the ReportRequest object.
+			$request = new Google_Service_AnalyticsReporting_ReportRequest();
+			$request->setViewId( $this->profileId );
+			$request->setDateRanges( [ $dateRange ] );
+			$request->setMetrics( [ $gaMetric ] );
+			$request->setDimensions( [ $dimension ] );
+			$request->setDimensionFilterClauses( [ $dimensionFilterClause ] );
+
+			$body = new Google_Service_AnalyticsReporting_GetReportsRequest();
+			$body->setReportRequests( [ $request ] );
+
+			try {
+				$data = $this->analytics->reports->batchGet( $body );
+				$rows = $data->getReports()[0]->getData()->getRows();
+				foreach ( $rows as $row ) {
+					$ts = $row->dimensions[0];
+					$day = substr( $ts, 0, 4 ) . '-' . substr( $ts, 4, 2 ) . '-' . substr( $ts, 6, 2 );
+					$count = (int)$row->metrics[0]->values[0];
+					$result[$title->getPrefixedDBkey()][$day] = $count;
+				}
+				$status->success[$title->getPrefixedDBkey()] = true;
+			} catch ( RuntimeException $e ) {
+				$status->error( 'pvi-invalidresponse' );
+				$status->success[$title->getPrefixedDBkey()] = false;
+				continue;
+			}
+		}
+		$status->successCount = count( array_filter( $status->success ) );
+		$status->failCount = count( $status->success ) - $status->successCount;
+		$status->setResult( (bool)$status->successCount, $result );
+		return $status;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getSiteData( $days, $metric = self::METRIC_VIEW ) {
+		if ( $metric !== self::METRIC_VIEW && $metric !== self::METRIC_UNIQUE ) {
+			throw new InvalidArgumentException( 'Invalid metric: ' . $metric );
+		}
+		if ( $days <= 0 ) {
+			throw new InvalidArgumentException( 'Invalid days: ' . $days );
+		}
+		$result = $this->getEmptyDateRange( $days );
+
+		// Create the DateRange object.
+		$dateRange = new Google_Service_AnalyticsReporting_DateRange();
+		$dateRange->setStartDate( $days . 'daysAgo' );
+		$dateRange->setEndDate( '1daysAgo' );
+
+		// Create the Metrics object.
+		$gaMetric = new Google_Service_AnalyticsReporting_Metric();
+		if ( $metric === self::METRIC_VIEW ) {
+			$gaMetric->setExpression( 'ga:pageviews' );
+		} elseif ( $metric === self::METRIC_UNIQUE ) {
+			$gaMetric->setExpression( 'ga:uniquePageviews' );
+		} else {
+			throw new InvalidArgumentException( 'Invalid metric: ' . $metric );
+		}
+
+		// Create the Dimension object.
+		$dimension = new Google_Service_AnalyticsReporting_Dimension();
+		$dimension->setName( 'ga:date' );
+
+		// Create the ReportRequest object.
+		$request = new Google_Service_AnalyticsReporting_ReportRequest();
+		$request->setViewId( $this->profileId );
+		$request->setDateRanges( [ $dateRange ] );
+		$request->setMetrics( [ $gaMetric ] );
+		$request->setDimensions( [ $dimension ] );
+
+		$body = new Google_Service_AnalyticsReporting_GetReportsRequest();
+		$body->setReportRequests( [ $request ] );
+
+		$status = Status::newGood();
+		try {
+			$data = $this->analytics->reports->batchGet( $body );
+			$rows = $data->getReports()[0]->getData()->getRows();
+
+			foreach ( $rows as $row ) {
+				$ts = $row->dimensions[0];
+				$day = substr( $ts, 0, 4 ) . '-' . substr( $ts, 4, 2 ) . '-' . substr( $ts, 6, 2 );
+				$count = (int)$row->metrics[0]->values[0];
+				$result[$day] = $count;
+			}
+			$status->setResult( $status->isOK(), $result );
+		} catch ( RuntimeException $e ) {
+			$status->fatal( 'pvi-invalidresponse' );
+		}
+		return $status;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getTopPages( $metric = self::METRIC_VIEW ) {
+		$result = [];
+		if ( !in_array( $metric, [ self::METRIC_VIEW, self::METRIC_UNIQUE ] ) ) {
+			throw new InvalidArgumentException( 'Invalid metric: ' . $metric );
+		}
+
+		// Create the DateRange object.
+		$dateRange = new Google_Service_AnalyticsReporting_DateRange();
+		$dateRange->setStartDate( '2daysAgo' );
+		$dateRange->setEndDate( '1daysAgo' );
+
+		// Create the Metrics object and OrderBy object.
+		$gaMetric = new Google_Service_AnalyticsReporting_Metric();
+		$orderBy = new Google_Service_AnalyticsReporting_OrderBy();
+		$orderBy->setSortOrder( 'DESCENDING' );
+		if ( $metric === self::METRIC_VIEW ) {
+			$gaMetric->setExpression( 'ga:pageviews' );
+			$orderBy->setFieldName( 'ga:pageviews' );
+		} elseif ( $metric === self::METRIC_UNIQUE ) {
+			$gaMetric->setExpression( 'ga:uniquePageviews' );
+			$orderBy->setFieldName( 'ga:uniquePageviews' );
+		}
+
+		// Create the Dimension object.
+		$dimension = new Google_Service_AnalyticsReporting_Dimension();
+		$dimension->setName( 'ga:pageTitle' );
+
+		// Create the ReportRequest object.
+		$request = new Google_Service_AnalyticsReporting_ReportRequest();
+		$request->setViewId( $this->profileId );
+		$request->setDateRanges( [ $dateRange ] );
+		$request->setMetrics( [ $gaMetric ] );
+		$request->setDimensions( [ $dimension ] );
+		$request->setOrderBys( [ $orderBy ] );
+
+		$body = new Google_Service_AnalyticsReporting_GetReportsRequest();
+		$body->setReportRequests( [ $request ] );
+
+		$status = Status::newGood();
+		try {
+			$data = $this->analytics->reports->batchGet( $body );
+			$rows = $data->getReports()[0]->getData()->getRows();
+
+			foreach ( $rows as $row ) {
+				$title = $row->dimensions[0];
+				$title = preg_replace( '/ - [^-]+$/', '', $title );
+				$title = preg_replace( '/ /', '_', $title );
+				$count = (int)$row->metrics[0]->values[0];
+				$result[$title] = $count;
+			}
+			$status->setResult( $status->isOK(), $result );
+		} catch ( RuntimeException $e ) {
+			$status->fatal( 'pvi-invalidresponse' );
+		}
+		return $status;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getCacheExpiry( $metric, $scope ) {
+		// data is valid until the end of the day
+		$endOfDay = strtotime( '0:0 next day' );
+		return $endOfDay - time();
+	}
+
+	/**
+	 * @param array $apiOptions
+	 * @throws InvalidArgumentException
+	 */
+	protected function verifyApiOptions( array $apiOptions ) {
+		if ( !isset( $apiOptions['credentialsFile'] ) ) {
+			throw new InvalidArgumentException( "'credentialsFile' is required" );
+		} elseif ( !isset( $apiOptions['profileId'] ) ) {
+			throw new InvalidArgumentException( "'profileId' is required" );
+		}
+	}
+
+	/**
+	 * The API omits dates if there is no data. Fill it with nulls to make client-side
+	 * processing easier.
+	 * @param int $days
+	 * @return array YYYY-MM-DD => null
+	 */
+	protected function getEmptyDateRange( $days ) {
+		if ( !$this->range ) {
+			$this->range = [];
+			// we only care about the date part, so add some hours to avoid errors when there is a
+			// leap second or some other weirdness
+			$end = $this->lastCompleteDay + 12 * 3600;
+			$start = $end - ( $days - 1 ) * 24 * 3600;
+			for ( $ts = $start; $ts <= $end; $ts += 24 * 3600 ) {
+				$this->range[gmdate( 'Y-m-d', $ts )] = null;
+			}
+		}
+		return $this->range;
+	}
+
+	/**
+	 * Get start and end timestamp in YYYYMMDDHH format
+	 * @param int $days
+	 * @return string[]
+	 */
+	protected function getStartEnd( $days ) {
+		$end = $this->lastCompleteDay + 12 * 3600;
+		$start = $end - ( $days - 1 ) * 24 * 3600;
+		return [ gmdate( 'Ymd', $start ) . '00', gmdate( 'Ymd', $end ) . '00' ];
+	}
+}
diff --git a/includes/Hooks/Handler.php b/includes/Hooks/Handler.php
index 895ed4d..eda0d32 100644
--- a/includes/Hooks/Handler.php
+++ b/includes/Hooks/Handler.php
@@ -170,7 +170,12 @@ public function onHtmlPageLinkRendererBegin( $linkRenderer, $target, &$text,
 		&$customAttribs, &$query, &$ret
 	) {
 		// See https://github.com/femiwiki/UnifiedExtensionForFemiwiki/issues/23
-		if ( defined( 'MW_PHPUNIT_TEST' ) && ( $target == 'Rights Page' || $target == 'Parser test' ) ) {
+		if ( defined( 'MW_PHPUNIT_TEST' ) && in_array( $target, [
+				'Link to nowhere',
+				'Link',
+				'Parser test',
+				'Rights Page',
+			] ) ) {
 			return true;
 		}
 
diff --git a/includes/Hooks/PageViewInfoHandler.php b/includes/Hooks/PageViewInfoHandler.php
new file mode 100644
index 0000000..92f51ad
--- /dev/null
+++ b/includes/Hooks/PageViewInfoHandler.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace MediaWiki\Extension\UnifiedExtensionForFemiwiki\Hooks;
+
+use MediaWiki\Extension\UnifiedExtensionForFemiwiki\GoogleAnalyticsPageViewService;
+use MediaWiki\Extensions\PageViewInfo\PageViewService;
+use MediaWiki\MediaWikiServices;
+
+class PageViewInfoHandler {
+	/**
+	 * @param PageViewService &$service
+	 * @return bool|void
+	 */
+	public static function onPageViewInfoAfterPageViewService( &$service ) {
+		$config = MediaWikiServices::getInstance()->getMainConfig();
+		$credentialsFile = $config->get( 'UnifiedExtensionForFemiwikiGoogleAnalyticsCredentialsFile' );
+		$profileId = $config->get( 'UnifiedExtensionForFemiwikiGoogleAnalyticsProfileId' );
+
+		$service = new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => $credentialsFile,
+			'profileId' => $profileId
+		] );
+
+		return false;
+	}
+}
diff --git a/tests/phpunit/integration/GoogleAnalyticsPageViewServiceTest.php b/tests/phpunit/integration/GoogleAnalyticsPageViewServiceTest.php
new file mode 100644
index 0000000..831843d
--- /dev/null
+++ b/tests/phpunit/integration/GoogleAnalyticsPageViewServiceTest.php
@@ -0,0 +1,178 @@
+<?php
+
+namespace MediaWiki\Extension\UnifiedExtensionForFemiwiki\Tests\Integration;
+
+use Exception;
+use MediaWiki\Extension\UnifiedExtensionForFemiwiki\GoogleAnalyticsPageViewService;
+use MediaWikiIntegrationTestCase;
+use RuntimeException;
+use Status;
+use Title;
+use Wikimedia\TestingAccessWrapper;
+
+/**
+ * @covers \MediaWiki\Extension\UnifiedExtensionForFemiwiki\GoogleAnalyticsPageViewService
+ */
+class GoogleAnalyticsPageViewServiceTest extends MediaWikiIntegrationTestCase {
+	/** @var [ stdClass ] */
+	public static $batches = [];
+
+	public function setUp() : void {
+		parent::setUp();
+		self::$batches = [];
+	}
+
+	protected function assertThrows( $class, callable $test ) {
+		try {
+			$test();
+		} catch ( Exception $e ) {
+			$this->assertInstanceOf( $class, $e );
+			return;
+		}
+		$this->fail( 'No exception was thrown, expected ' . $class );
+	}
+
+	/**
+	 * Prepare the mock \Google_Service_Analytics which will be used for the next call
+	 * @param GoogleAnalyticsPageViewService $service
+	 * @param array|false $rows If false error is thrown
+	 * @throws RuntimeException
+	 */
+	protected function mockNextBatchGet(
+		GoogleAnalyticsPageViewService $service, $rows
+	) {
+		self::$batches[] = $rows;
+		$wrapper = TestingAccessWrapper::newFromObject( $service );
+		$wrapper->analytics = (object)[
+			'reports' => new class {
+				public function batchGet() {
+					return new class {
+						public function getReports() {
+							return [
+								new class {
+									public function getData() {
+										return new class {
+											public function getRows() {
+												$batch = array_shift( GoogleAnalyticsPageViewServiceTest::$batches );
+												if ( $batch === false ) {
+													throw new RuntimeException();
+												}
+												return $batch;
+											}
+										};
+									}
+								}
+							];
+						}
+					};
+				}
+			}
+		];
+	}
+
+	/**
+	 * Changes the start/end dates
+	 * @param GoogleAnalyticsPageViewService $service
+	 * @param string $end YYYY-MM-DD
+	 */
+	protected function mockDate( GoogleAnalyticsPageViewService $service, $end ) {
+		$wrapper = TestingAccessWrapper::newFromObject( $service );
+		$wrapper->lastCompleteDay = strtotime( $end . 'T00:00Z' );
+		$wrapper->range = null;
+	}
+
+	public function testGetPageData() {
+		$service = new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => false,
+			'profileId' => '123456'
+		] );
+		$this->mockDate( $service, '2000-01-05' );
+
+		// valid request
+		foreach ( [ 'Foo', 'Bar' ] as $page ) {
+			$this->mockNextBatchGet( $service, [
+				(object)[
+					'dimensions' => [ '20000101' ],
+					'metrics' => [ (object)[ 'values' => [ $page === 'Foo' ? '1000' : '500' ] ] ]
+				],
+				(object)[
+					'dimensions' => [ '20000102' ],
+					'metrics' => [ (object)[ 'values' => [ $page === 'Foo' ? '100' : '50' ] ] ]
+				],
+				(object)[
+					'dimensions' => [ '20000104' ],
+					'metrics' => [ (object)[ 'values' => [ $page === 'Foo' ? '10' : '5' ] ] ]
+				],
+			] );
+		}
+
+		$status = $service->getPageData( [
+			Title::newFromText( 'Foo' ),
+			Title::newFromText( 'Bar' )
+		], 5 );
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'Foo' => [
+				'2000-01-01' => 1000,
+				'2000-01-02' => 100,
+				'2000-01-03' => null,
+				'2000-01-04' => 10,
+				'2000-01-05' => null,
+			],
+			'Bar' => [
+				'2000-01-01' => 500,
+				'2000-01-02' => 50,
+				'2000-01-03' => null,
+				'2000-01-04' => 5,
+				'2000-01-05' => null,
+			],
+		], $status->getValue() );
+		$this->assertSame( [ 'Foo' => true, 'Bar' => true ], $status->success );
+		$this->assertSame( 2, $status->successCount );
+		$this->assertSame( 0, $status->failCount );
+
+		$this->mockDate( $service, '2000-01-01' );
+		// valid, no result and error, combined
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, [
+			(object)[
+				'dimensions' => [ '20000101' ],
+				'metrics' => [ (object)[ 'values' => [ '1' ] ] ]
+			]
+		] );
+		$this->mockNextBatchGet( $service, [] );
+		$this->mockNextBatchGet( $service, false );
+		$status = $service->getPageData( [ Title::newFromText( 'A' ),
+			Title::newFromText( 'B' ), Title::newFromText( 'C' ) ], 1 );
+		$this->assertFalse( $status->isGood() );
+		if ( !$status->isOK() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'A' => [
+				'2000-01-01' => 1,
+			],
+			'B' => [
+				'2000-01-01' => null,
+			],
+			'C' => [
+				'2000-01-01' => null,
+			],
+		], $status->getValue() );
+		$this->assertSame( [ 'A' => true, 'B' => true, 'C' => false ], $status->success );
+		$this->assertSame( 2, $status->successCount );
+		$this->assertSame( 1, $status->failCount );
+
+		// all error out
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, false );
+		$this->mockNextBatchGet( $service, false );
+		$status = $service->getPageData( [ Title::newFromText( 'A' ), Title::newFromText( 'B' ) ], 1 );
+		$this->assertFalse( $status->isOK() );
+		$this->assertSame( [ 'A' => false, 'B' => false ], $status->success );
+		$this->assertSame( 0, $status->successCount );
+		$this->assertSame( 2, $status->failCount );
+	}
+}
diff --git a/tests/phpunit/unit/GoogleAnalyticsPageViewServiceTest.php b/tests/phpunit/unit/GoogleAnalyticsPageViewServiceTest.php
new file mode 100644
index 0000000..126d97f
--- /dev/null
+++ b/tests/phpunit/unit/GoogleAnalyticsPageViewServiceTest.php
@@ -0,0 +1,260 @@
+<?php
+
+namespace MediaWiki\Extension\UnifiedExtensionForFemiwiki\Tests\Unit;
+
+use Exception;
+use InvalidArgumentException;
+use MediaWiki\Extension\UnifiedExtensionForFemiwiki\GoogleAnalyticsPageViewService;
+use MediaWiki\Extensions\PageViewInfo\PageViewService;
+use PHPUnit\Framework\TestCase;
+use RuntimeException;
+use Status;
+use Wikimedia\TestingAccessWrapper;
+
+/**
+ * @covers \MediaWiki\Extension\UnifiedExtensionForFemiwiki\GoogleAnalyticsPageViewService
+ */
+class GoogleAnalyticsPageViewServiceTest extends TestCase {
+	/** @var [ stdClass ] */
+	public static $batches = [];
+
+	public function setUp() : void {
+		parent::setUp();
+		self::$batches = [];
+	}
+
+	protected function assertThrows( $class, callable $test ) {
+		try {
+			$test();
+		} catch ( Exception $e ) {
+			$this->assertInstanceOf( $class, $e );
+			return;
+		}
+		$this->fail( 'No exception was thrown, expected ' . $class );
+	}
+
+	/**
+	 * Prepare the mock \Google_Service_Analytics which will be used for the next call
+	 * @param GoogleAnalyticsPageViewService $service
+	 * @param array|false $rows If false error is thrown
+	 * @throws RuntimeException
+	 */
+	protected function mockNextBatchGet(
+		GoogleAnalyticsPageViewService $service, $rows
+	) {
+		self::$batches[] = $rows;
+		$wrapper = TestingAccessWrapper::newFromObject( $service );
+		$wrapper->analytics = (object)[
+			'reports' => new class {
+				public function batchGet() {
+					return new class {
+						public function getReports() {
+							return [
+								new class {
+									public function getData() {
+										return new class {
+											public function getRows() {
+												$batch = array_shift( GoogleAnalyticsPageViewServiceTest::$batches );
+												if ( $batch === false ) {
+													throw new RuntimeException();
+												}
+												return $batch;
+											}
+										};
+									}
+								}
+							];
+						}
+					};
+				}
+			}
+		];
+	}
+
+	/**
+	 * Changes the start/end dates
+	 * @param GoogleAnalyticsPageViewService $service
+	 * @param string $end YYYY-MM-DD
+	 */
+	protected function mockDate( GoogleAnalyticsPageViewService $service, $end ) {
+		$wrapper = TestingAccessWrapper::newFromObject( $service );
+		$wrapper->lastCompleteDay = strtotime( $end . 'T00:00Z' );
+		$wrapper->range = null;
+	}
+
+	public function testConstructor() {
+		$this->assertThrows( InvalidArgumentException::class, static function () {
+			new GoogleAnalyticsPageViewService( [] );
+		} );
+		$this->assertThrows( InvalidArgumentException::class, static function () {
+			new GoogleAnalyticsPageViewService( [
+				'credentialsFile' => 'non-exist-file.json',
+				'profileId' => 'foobar'
+			] );
+		} );
+		new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => false,
+			'profileId' => '123456'
+		] );
+	}
+
+	public function testGetSiteData() {
+		$service = new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => false,
+			'profileId' => '123456'
+		] );
+		$this->mockDate( $service, '2000-01-05' );
+
+		// valid request
+		$this->mockNextBatchGet( $service, [
+			(object)[
+				'dimensions' => [ '20000101' ],
+				'metrics' => [ (object)[ 'values' => [ '1000' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ '20000102' ],
+				'metrics' => [ (object)[ 'values' => [ '100' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ '20000104' ],
+				'metrics' => [ (object)[ 'values' => [ '10' ] ] ]
+			]
+		] );
+		$status = $service->getSiteData( 5 );
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'2000-01-01' => 1000,
+			'2000-01-02' => 100,
+			'2000-01-03' => null,
+			'2000-01-04' => 10,
+			'2000-01-05' => null,
+		], $status->getValue() );
+
+		// no result
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, [] );
+		$status = $service->getSiteData( 5 );
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'2000-01-01' => null,
+			'2000-01-02' => null,
+			'2000-01-03' => null,
+			'2000-01-04' => null,
+			'2000-01-05' => null,
+		], $status->getValue() );
+
+		// genuine error
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, false );
+		$status = $service->getSiteData( 5 );
+		$this->assertFalse( $status->isOK() );
+	}
+
+	public function testGetSiteData_unique() {
+		$service = new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => false,
+			'profileId' => '123456'
+		] );
+		$this->mockDate( $service, '2000-01-05' );
+
+		// valid request
+		$this->mockNextBatchGet( $service, [
+			(object)[
+				'dimensions' => [ '20000101' ],
+				'metrics' => [ (object)[ 'values' => [ '1000' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ '20000102' ],
+				'metrics' => [ (object)[ 'values' => [ '100' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ '20000104' ],
+				'metrics' => [ (object)[ 'values' => [ '10' ] ] ]
+			]
+		] );
+		$status = $service->getSiteData( 5, PageViewService::METRIC_UNIQUE );
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'2000-01-01' => 1000,
+			'2000-01-02' => 100,
+			'2000-01-03' => null,
+			'2000-01-04' => 10,
+			'2000-01-05' => null,
+		], $status->getValue() );
+
+		// no result
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, [] );
+		$status = $service->getSiteData( 5, PageViewService::METRIC_UNIQUE );
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'2000-01-01' => null,
+			'2000-01-02' => null,
+			'2000-01-03' => null,
+			'2000-01-04' => null,
+			'2000-01-05' => null,
+		], $status->getValue() );
+
+		// genuine error
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, false );
+		$status = $service->getSiteData( 5, PageViewService::METRIC_UNIQUE );
+		$this->assertFalse( $status->isOK() );
+	}
+
+	public function testGetTopPages() {
+		$service = new GoogleAnalyticsPageViewService( [
+			'credentialsFile' => false,
+			'profileId' => '123456'
+		] );
+		$this->mockDate( $service, '2000-01-05' );
+
+		// valid request
+		$this->mockNextBatchGet( $service, [
+			(object)[
+				'dimensions' => [ "Main Page - ExampleWiki" ],
+				'metrics' => [ (object)[ 'values' => [ '1000' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ 'Special:Search - ExampleWiki' ],
+				'metrics' => [ (object)[ 'values' => [ '100' ] ] ]
+			],
+			(object)[
+				'dimensions' => [ '404.php' ],
+				'metrics' => [ (object)[ 'values' => [ '10' ] ] ]
+			]
+		] );
+		$status = $service->getTopPages();
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [
+			'Main_Page' => 1000,
+			'Special:Search' => 100,
+			'404.php' => 10,
+		], $status->getValue() );
+
+		// no result
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, [] );
+		$status = $service->getTopPages();
+		if ( !$status->isGood() ) {
+			$this->fail( Status::wrap( $status )->getWikiText() );
+		}
+		$this->assertSame( [], $status->getValue() );
+
+		// genuine error
+		self::$batches = [];
+		$this->mockNextBatchGet( $service, false );
+		$status = $service->getTopPages();
+		$this->assertFalse( $status->isOK() );
+	}
+}