ImageUpload: local storage erste Version

[kivitendo-erp.git] / js / kivi.FileDB.js

diff --git a/js/kivi.FileDB.js b/js/kivi.FileDB.js
new file mode 100644 (file)
index 0000000..3edb45b
--- /dev/null
+++ b/js/kivi.FileDB.js
@@ -0,0 +1,87 @@
+namespace("kivi.FileDB", function(ns) {
+  "use strict";
+
+  const database = 'kivi';
+  const store    = 'files';
+  const db_version = 1;
+
+  // IndexedDB
+  const indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.OIndexedDB || window.msIndexedDB;
+
+  // Create/open database
+  let db;
+  let request = indexedDB.open(database, db_version);
+  request.onupgradeneeded = (event) => {
+    ns.create_image_store(event.target.result);
+  };
+  request.onerror = ns.onerror;
+  request.onsuccess = () => {
+    db = request.result;
+
+    db.onerror = (event) => {
+      console.error("Error creating/accessing IndexedDB database");
+      console.error(event);
+    };
+
+    // Interim solution for Google Chrome to create an objectStore. Will be deprecated
+    if (db.setVersion) {
+      if (db.version != db_version) {
+        let setVersion = db.setVersion(db_version);
+        setVersion.onsuccess = () =>  {
+          ns.create_image_store(db);
+        };
+      }
+    }
+  };
+
+  ns.create_image_store = function (db) {
+    db.createObjectStore(store, { autoIncrement : true });
+  };
+
+  ns.store_image = function (blob, filename, success) {
+    let put_request = ns.open_store("readwrite").add(blob, filename);
+
+    put_request.onsuccess = success;
+    put_request.on_error = ns.onerror;
+  };
+
+  ns.retrieve_image = function(key, success) {
+    let get_request = ns.open_store().objectStore(store).get(key);
+
+    get_request.onsuccess = success;
+    get_request.onerror = request.onerror;
+  };
+
+  ns.retrieve_all = function(success) {
+    let request = ns.open_store().getAll();
+    request.onsuccess = (event) => { success(event.target.result); };
+    request.onerror = ns.error;
+  };
+
+  ns.retrieve_all_keys = function(success) {
+    let request = ns.open_store().getAllKeys();
+    request.onsuccess = (event) => { success(event.target.result); };
+    request.onerror = ns.error;
+  };
+
+  ns.delete_all= function() {
+    ns.retrieve_all_keys((keys) => {
+      keys.forEach((key) => ns.delete_key(key));
+    });
+  };
+
+  ns.delete_key= function(key, success) {
+    let request = ns.open_store("readwrite").delete(key);
+    request.onsuccess = (event) => { if (success) success(event.target.result); };
+    request.onerror = ns.error;
+  };
+
+  ns.open_store = function(mode = "readonly")  {
+    return db.transaction([store], mode).objectStore(store);
+  };
+
+  ns.onerror = (event) => {
+    console.error("Error creating/accessing IndexedDB database");
+    console.error(event.errorState);
+  };
+});