chore(seed): Move seed script to tools

tools/scripts/seed/seedChallenges.js

@@ -0,0 +1,77 @@
+const path = require('path');
+const fs = require('fs');
+require('dotenv').config({ path: path.resolve(__dirname, '../.env') });
+const MongoClient = require('mongodb').MongoClient;
+const { getChallengesForLang } = require('@freecodecamp/curriculum');
+const { flatten } = require('lodash');
+const debug = require('debug');
+
+const { createPathMigrationMap } = require('./createPathMigrationMap');
+
+const log = debug('fcc:tools:seedChallenges');
+const { MONGOHQ_URL, LOCALE: lang } = process.env;
+
+function handleError(err, client) {
+  if (err) {
+    console.error('Oh noes!!');
+    console.error(err);
+    try {
+      client.close();
+    } catch (e) {
+      // no-op
+    } finally {
+      /* eslint-disable-next-line no-process-exit */
+      process.exit(1);
+    }
+  }
+}
+
+MongoClient.connect(
+  MONGOHQ_URL,
+  { useNewUrlParser: true },
+  function(err, client) {
+    handleError(err, client);
+
+    log('Connected successfully to mongo');
+
+    const db = client.db('freecodecamp');
+    const challenges = db.collection('challenges');
+
+    challenges.deleteMany({}, err => {
+      handleError(err, client);
+
+      const curriculum = getChallengesForLang(lang);
+
+      const allChallenges = Object.keys(curriculum)
+        .map(key => curriculum[key].blocks)
+        .reduce((challengeArray, superBlock) => {
+          const challengesForBlock = Object.keys(superBlock).map(
+            key => superBlock[key].challenges
+          );
+          return [...challengeArray, ...flatten(challengesForBlock)];
+        }, []);
+
+      try {
+        challenges.insertMany(allChallenges, { ordered: false });
+      } catch (e) {
+        handleError(e, client);
+      } finally {
+        log('challenge seed complete');
+        client.close();
+        log('generating path migration map');
+        const pathMap = createPathMigrationMap(curriculum);
+        const outputDir = path.resolve(
+          __dirname,
+          '../../../api-server/server/resources/pathMigration.json'
+        );
+        fs.writeFile(outputDir, JSON.stringify(pathMap), err => {
+          if (err) {
+            console.error('Oh noes!!');
+            console.error(err);
+          }
+          log('path migration map generated');
+        });
+      }
+    });
+  }
+);