init

frontend/widgets/ChatOmemo/chatomemo_db.js

@@ -0,0 +1,91 @@
+var ChatOmemoDB = {
+    dbName: 'movim',
+    storeName: 'decryptedMessages',
+    version: 3,
+
+    cachedMessages: {},
+
+    db: null,
+
+    setup: async function() {
+        var db = window.indexedDB.open(this.dbName, this.version);
+        db.onupgradeneeded = function (event) {
+            var db = event.target.result;
+            db.createObjectStore(ChatOmemoDB.storeName, { keyPath: "id" });
+        }
+
+        db.onsuccess = function() {
+            ChatOmemoDB.db = db;
+        }
+
+        db.onerror = function() {
+            console.log('Movim Decrypted Messages database cannot be opened properly');
+        }
+    },
+
+    loadMessagesByIds: async function(ids) {
+        ChatOmemoDB.cachedMessages = {};
+
+        var tx = ChatOmemoDB.db.result.transaction(ChatOmemoDB.storeName, 'readonly');
+        var os = tx.objectStore(ChatOmemoDB.storeName);
+
+        var promises = [];
+
+        ids.forEach(id => {
+            var request = os.get(id);
+
+            promises.push(new Promise((resolve, reject) => {
+                request.onsuccess = function (event) {
+                    if (event.target.result) {
+                        ChatOmemoDB.cachedMessages[id] = event.target.result.body;
+                    }
+                    resolve();
+                }
+
+                request.onerror = function() {
+                    resolve();
+                }
+            }));
+        });
+
+        return Promise.all(promises);
+    },
+
+    putMessage: async function(id, body) {
+        let promise = new Promise(resolve => {
+            var tx = ChatOmemoDB.db.result.transaction(ChatOmemoDB.storeName, 'readwrite');
+            var os = tx.objectStore(ChatOmemoDB.storeName);
+
+            var request = os.put({"id" : id, "body" : body});
+            request.onsuccess = function(event) {
+                resolve(body);
+            }
+        });
+
+        return promise;
+    },
+
+    getMessage: async function(id) {
+        let promise = new Promise(resolve => {
+            if (id in ChatOmemoDB.cachedMessages) {
+                resolve(ChatOmemoDB.cachedMessages[String(id)]);
+            } else {
+                var tx = ChatOmemoDB.db.result.transaction(ChatOmemoDB.storeName, 'readonly');
+                var os = tx.objectStore(ChatOmemoDB.storeName);
+
+                var request = os.get(id);
+                request.onsuccess = function(event) {
+                    if (event.target.result) {
+                        resolve(event.target.result.body);
+                    } else {
+                        resolve();
+                    }
+                }
+            }
+        });
+
+        return promise;
+    }
+}
+
+ChatOmemoDB.setup();