Feature/takedown bot

.env.sample

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+# https://ai.google.dev/gemini-api/docs/api-key
+GEMINI_API_KEY=
+
+# https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/authenticating-as-a-github-app-installation#using-the-octokitjs-sdk-to-authenticate-as-an-app-installation
+# See the step1 in the above link
+GITHUBAPP_ID=
+# See the step2 in the link, and make sure to convert to base64: `base64 -i your_private_key_file > key.base64`
+GITHUBAPP_PRIVATE_KEY_BASE64=
+# Step3 in the link
+GITHUBAPP_INSTALLATION_ID=
+
+# To generate takedown document(reply url) for moderators to review
+COFACTS_URL=https://dev.cofacts.tw
+
+# Query article replies from Cofacts API
+COFACTS_API_URL=https://dev-api.cofacts.tw/graphql
+
+# Specifies the time range to query replies from `REVIEW_REPLY_BEFORE`
+REVIEW_REPLY_BEFORE={ "seconds":0, "minutes":0, "hours":23, "days":46 }
+
+# Optional: use langfuse for tracing the llm response
+LANGFUSE_SECRET_KEY=
+LANGFUSE_PUBLIC_KEY=
+LANGFUSE_BASEURL=
+ENV=development

.eslintrc.cjs

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+module.exports = {
+  parser: '@babel/eslint-parser',
+  extends: [
+    'eslint:recommended',
+    'plugin:import/errors',
+    'plugin:import/warnings',
+    'prettier',
+  ],
+  env: { node: true, es6: true, jest: true },
+  plugins: ['prettier', 'import'],
+  rules: {
+    'prettier/prettier': [
+      'error',
+      {
+        trailingComma: 'es5',
+        singleQuote: true,
+      },
+    ],
+  },
+  settings: {
+    'import/resolver': {
+      'babel-module': {},
+      typescript: {},
+    },
+  },
+};

.github/workflows/takedown.yml

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+name: Spam Detection
+
+on:
+  schedule:
+    - cron: '4-59/10 * * * *'  # run every ten minutes, starting at 4 minutes past the hour
+  workflow_dispatch:      # allow manual trigger
+
+jobs:
+  scanning-spam:
+    environment: ${{ github.ref == 'refs/heads/master' && 'production' || 'staging' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+      - run: npm i
+
+      - name: Detect and create takedown PR
+        env:
+          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
+          GITHUBAPP_PRIVATE_KEY_BASE64: ${{ secrets.GITHUBAPP_PRIVATE_KEY_BASE64 }}
+          GITHUBAPP_ID: ${{ secrets.GITHUBAPP_ID }}
+          GITHUBAPP_INSTALLATION_ID: ${{ secrets.GITHUBAPP_INSTALLATION_ID }}
+          COFACTS_URL: ${{ vars.COFACTS_URL }}
+          COFACTS_API_URL: ${{ vars.COFACTS_API_URL }}
+          REVIEW_REPLY_BEFORE: ${{ vars.REVIEW_REPLY_BEFORE }}
+          LANGFUSE_BASEURL: ${{ vars.LANGFUSE_BASEURL }}
+          LANGFUSE_PUBLIC_KEY: ${{ secrets.LANGFUSE_PUBLIC_KEY }}
+          LANGFUSE_SECRET_KEY: ${{ secrets.LANGFUSE_SECRET_KEY }}
+          ENV: ${{ github.environment }}
+        run: npm run takedown

.gitignore

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+node_modules

babel.config.json

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+{
+  "presets": [
+    ["@babel/env", {
+      "targets": {
+        "node": "current"
+      }
+    }]
+  ],
+  "plugins": [
+    ["module-resolver", {
+      "root": ["./src", "./test"],
+      "extensions": [".js", ".ts"]
+    }]
+  ]
+}