Split database migrations into pre- and post-attachment migration

- Run light-weight migrations before attachment migration.
- Run regular migrations after attachments have been moved to disk.

js/database.js

@@ -2,13 +2,11 @@
 /* global Backbone: false */
 /* global _: false */
 
-/* eslint-disable more/no-then */
-
 // eslint-disable-next-line func-names
 (function () {
   'use strict';
 
-  const { Migrations } = window.Signal;
+  const { Migrations1DatabaseWithoutAttachmentData } = window.Signal.Database;
 
   window.Whisper = window.Whisper || {};
   window.Whisper.Database = window.Whisper.Database || {};
@@ -125,132 +123,5 @@
       request.onsuccess = resolve;
     }));
 
-  Whisper.Database.migrations = [
-    {
-      version: '12.0',
-      migrate(transaction, next) {
-        console.log('migration 12.0');
-        console.log('creating object stores');
-        const messages = transaction.db.createObjectStore('messages');
-        messages.createIndex('conversation', ['conversationId', 'received_at'], {
-          unique: false,
-        });
-        messages.createIndex('receipt', 'sent_at', { unique: false });
-        messages.createIndex('unread', ['conversationId', 'unread'], { unique: false });
-        messages.createIndex('expires_at', 'expires_at', { unique: false });
-
-        const conversations = transaction.db.createObjectStore('conversations');
-        conversations.createIndex('inbox', 'active_at', { unique: false });
-        conversations.createIndex('group', 'members', {
-          unique: false,
-          multiEntry: true,
-        });
-        conversations.createIndex('type', 'type', {
-          unique: false,
-        });
-        conversations.createIndex('search', 'tokens', {
-          unique: false,
-          multiEntry: true,
-        });
-
-        transaction.db.createObjectStore('groups');
-
-        transaction.db.createObjectStore('sessions');
-        transaction.db.createObjectStore('identityKeys');
-        transaction.db.createObjectStore('preKeys');
-        transaction.db.createObjectStore('signedPreKeys');
-        transaction.db.createObjectStore('items');
-
-        console.log('creating debug log');
-        transaction.db.createObjectStore('debug');
-
-        next();
-      },
-    },
-    {
-      version: '13.0',
-      migrate(transaction, next) {
-        console.log('migration 13.0');
-        console.log('Adding fields to identity keys');
-        const identityKeys = transaction.objectStore('identityKeys');
-        const request = identityKeys.openCursor();
-        const promises = [];
-        request.onsuccess = (event) => {
-          const cursor = event.target.result;
-          if (cursor) {
-            const attributes = cursor.value;
-            attributes.timestamp = 0;
-            attributes.firstUse = false;
-            attributes.nonblockingApproval = false;
-            attributes.verified = 0;
-            promises.push(new Promise(((resolve, reject) => {
-              const putRequest = identityKeys.put(attributes, attributes.id);
-              putRequest.onsuccess = resolve;
-              putRequest.onerror = (e) => {
-                console.log(e);
-                reject(e);
-              };
-            })));
-            cursor.continue();
-          } else {
-            // no more results
-            Promise.all(promises).then(() => {
-              next();
-            });
-          }
-        };
-        request.onerror = (event) => {
-          console.log(event);
-        };
-      },
-    },
-    {
-      version: '14.0',
-      migrate(transaction, next) {
-        console.log('migration 14.0');
-        console.log('Adding unprocessed message store');
-        const unprocessed = transaction.db.createObjectStore('unprocessed');
-        unprocessed.createIndex('received', 'timestamp', { unique: false });
-        next();
-      },
-    },
-    {
-      version: '15.0',
-      migrate(transaction, next) {
-        console.log('migration 15.0');
-        console.log('Adding messages index for de-duplication');
-        const messages = transaction.objectStore('messages');
-        messages.createIndex('unique', ['source', 'sourceDevice', 'sent_at'], {
-          unique: true,
-        });
-        next();
-      },
-    },
-    {
-      version: '16.0',
-      migrate(transaction, next) {
-        console.log('migration 16.0');
-        console.log('Dropping log table, since we now log to disk');
-        transaction.db.deleteObjectStore('debug');
-        next();
-      },
-    },
-    {
-      version: 17,
-      async migrate(transaction, next) {
-        console.log('migration 17');
-        console.log('Start migration to database version 17');
-
-        const start = Date.now();
-        await Migrations.V17.run(transaction);
-        const duration = Date.now() - start;
-
-        console.log(
-          'Complete migration to database version 17.',
-          `Duration: ${duration}ms`
-        );
-        next();
-      },
-    },
-  ];
+  Whisper.Database.migrations = Migrations1DatabaseWithoutAttachmentData.migrations;
 }());