Merge pull request #52 from bikingbadger/51-get-all-pagination-values…

…-for-weight Get all pagination values for weight
bikingbadger · Jun 17, 2020 · a90755a · a90755a
2 parents 989b13b + 1c06985
commit a90755a
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Showing 2 changed files with 81 additions and 52 deletions.
diff --git a/src/components/Home.vue b/src/components/Home.vue
@@ -80,24 +80,6 @@ export default {
       },
     ];
 
-    /**
-     * It will also sort the data from oldest to newest based on the date
-     */
-    this.weightData.sort((a, b) => {
-      const dateA = new Date(a.weightDate);
-      const dateB = new Date(b.weightDate);
-
-      /**
-       * Return result based on whether the date is bigger or smaller
-       * The return is based on sorting oldest to newest so
-       * newer values should come after older ones
-       */
-      if (dateA > dateB) return 1;
-      if (dateA < dateB) return -1;
-      return 0;
-    });
-    // console.log(this.weightData);
-
     /**
      * Fill the array with empty dates where a weight has not been input
      * This is to give the graph x-axis the correct number of days

diff --git a/src/functions/weight-read-all.js b/src/functions/weight-read-all.js
@@ -1,11 +1,15 @@
 require('dotenv').config();
 const axios = require('axios');
 
-exports.handler = (event, context, callback) => {
-  console.log('===============================================');
-  console.log('===============================================');
-  console.log(`${event.httpMethod}: ${event.path}`);
-  return axios({
+const getResponse = async (after = null) => {
+  // Calculate size of the pagination
+  const size = `_size: 90`;
+
+  // Create a cursor if pagination value is given for the next page
+  // This value is used in the query parameter below
+  const cursor = after ? `,_cursor: "${after}"` : '';
+  // console.log(cursor);
+  return await axios({
     url: 'https://graphql.fauna.com/graphql',
     headers: {
       'Content-Type': 'application/json',
@@ -15,36 +19,79 @@ exports.handler = (event, context, callback) => {
     method: 'post',
     data: {
       query: `
-        query FindAllWeights {
-          allWeights(_size: 90) {
-            data {
-              weightDate
-              weightKilograms
-            }
-            before
-            after
+      query FindAllWeights {
+        allWeights(${size} ${cursor}) {
+          data {
+            weightDate
+            weightKilograms
           }
+          before
+          after
         }
-        `,
+      }
+      `,
     },
-  })
-    .then((result) => {
-      const weightArray = result.data.data.allWeights.data;
-      console.log('weightArray',weightArray);
-      console.log('===============================================');
-      console.log('===============================================');
-      return callback(null, {
-        statusCode: 200,
-        body: JSON.stringify(weightArray),
-      });
-    })
-    .catch((error) => {
-      console.log(error);
-      console.log('===============================================');
-      console.log('===============================================');
-      return callback(null, {
-        statusCode: 400,
-        body: JSON.stringify(error),
-      });
-    });
+  });
+};
+
+const getWeights = async () => {
+  let response = await getResponse();
+  let weightArray = [];
+
+  // Push the array if there is data
+  response.data.data.allWeights.data &&
+    weightArray.push(response.data.data.allWeights.data);
+
+  // Find the next page
+  let nextPage = response.data.data.allWeights.after;
+
+  // Check if there is another page in the pagination, using recursion
+  // get the next values
+  while (nextPage) {
+    // Get the next page of results using the nextPage value returned
+    // by the previous query
+    response = await getResponse(nextPage);
+
+    // Push the array if there is data
+    response.data.data.allWeights.data &&
+      weightArray.push(response.data.data.allWeights.data);
+
+    // Find the next page
+    nextPage = response.data.data.allWeights.after;
+  }
+
+  // Return flattened the array that is for each page into a single array
+  return weightArray.flat(1);
+};
+
+exports.handler = async (event, context, callback) => {
+  console.log('===============================================');
+  console.log('===============================================');
+  console.log(`${event.httpMethod}: ${event.path}`);
+
+  const weightArray = await getWeights();
+
+  /**
+   * Sort the data from oldest to newest based on the date
+   */
+  weightArray.sort((a, b) => {
+    const dateA = new Date(a.weightDate);
+    const dateB = new Date(b.weightDate);
+
+    /**
+     * Return result based on whether the date is bigger or smaller
+     * The return is based on sorting oldest to newest so
+     * newer values should come after older ones
+     */
+    if (dateA > dateB) return 1;
+    if (dateA < dateB) return -1;
+    return 0;
+  });
+
+  console.log('===============================================');
+  console.log('===============================================');
+  return callback(null, {
+    statusCode: 200,
+    body: JSON.stringify(weightArray),
+  });
 };