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gaia/distros/spark/apps/studio/js/storage.js

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+/*global
+  ThemeCreator
+ */
+
+(function(exports) {
+  'use strict';
+
+  exports.Storage = {
+    fetchThemesList: function() {
+      return getAllThemes().then(function(themes) {
+        return themes.map(function(theme) {
+          return {
+            id: theme.id,
+            title: theme.title
+          };
+        });
+      });
+    },
+
+    fetchTheme: function(id) {
+      return getTheme(id);
+    },
+
+    createTheme: function(theme) {
+      return setTheme(theme);
+    },
+
+    forkTheme: function(theme, title) {
+      delete theme.id;
+      delete theme.manifestURL;
+      theme.title = title;
+      return setTheme(theme);
+    },
+
+    updateTheme: function(theme) {
+      return setTheme(theme);
+    },
+
+    removeTheme: function(id) {
+      return deleteTheme(id);
+    }
+  };
+
+  // IDB private stuffs
+  var defaults = [
+    ThemeCreator.solarized('light'),
+    ThemeCreator.solarized('dark')
+  ];
+
+  var database;
+  function getDB() {
+    return new Promise(function(resolve, reject) {
+      if (database) {
+        resolve(database);
+        return;
+      }
+
+      var req = exports.indexedDB.open('Studio', 1);
+      req.onerror = function(e) {
+        reject(e.target.request.errorCode);
+      };
+      req.onsuccess = function(e) {
+        database = e.target.result;
+        resolve(database);
+      };
+      req.onupgradeneeded = function(e) {
+        var db = e.target.result;
+        var store = db.createObjectStore('themes', {
+          keyPath:  'id',
+          autoIncrement : true
+        });
+        for (var i = 0; i < defaults.length; i++) {
+          store.put(defaults[i]);
+        }
+      };
+    });
+  }
+
+  function getAllThemes() {
+    return getDB().then(function(db) {
+      return new Promise(function(resolve, reject) {
+        var store = db.transaction('themes').objectStore('themes');
+
+        var themes = [];
+        var req = store.openCursor();
+        req.onsuccess = function(e) {
+          var cursor = e.target.result;
+          if (cursor) {
+            themes.push(cursor.value);
+            cursor.continue();
+          } else {
+            resolve(themes);
+          }
+        };
+        req.onerror = function(e) {
+          reject(e.target.errorCode);
+        };
+      });
+    });
+  }
+
+  function getTheme(id) {
+    return getDB().then(function(db) {
+      return new Promise(function(resolve, reject) {
+        var req = db.transaction('themes').objectStore('themes').get(id);
+        req.onsuccess = function(e) {
+          resolve(e.target.result);
+        };
+        req.onerror = function(e) {
+          reject(e.target.errorCode);
+        };
+      });
+    });
+  }
+
+  function setTheme(theme) {
+    return getDB().then(function(db) {
+      return new Promise(function(resolve, reject) {
+        var store = db.transaction('themes', 'readwrite').objectStore('themes');
+        var req = store.put(theme);
+        req.onsuccess = function(e) {
+          resolve(e.target.result);
+        };
+        req.onerror = function(e) {
+          reject(e.target.errorCode);
+        };
+      });
+    });
+  }
+
+  function deleteTheme(id) {
+    return getDB().then(function(db) {
+      return new Promise(function(resolve, reject) {
+        var store = db.transaction('themes', 'readwrite').objectStore('themes');
+        var req = store.delete(id);
+        req.onsuccess = function(e) {
+          resolve(e.target.result);
+        };
+        req.onerror = function(e) {
+          reject(e.target.errorCode);
+        };
+      });
+    });
+  }
+})(window);