WIP [indexedDB] Add pseudo index support in allDocs

src/jio.storage/indexeddbstorage.js

@@ -65,7 +65,7 @@
   }
 
   IndexedDBStorage.prototype.hasCapacity = function (name) {
-    return ((name === "list") || (name === "include"));
+    return ((name === "list") || (name === "include") || (name === "index"));
   };
 
   function buildKeyPath(key_list) {
@@ -268,7 +268,9 @@
 
   IndexedDBStorage.prototype.buildQuery = function (options) {
     var result_list = [],
-      context = this;
+      context = this,
+      key = "_id",
+      value;
 
     function pushIncludedMetadata(cursor) {
       result_list.push({
@@ -285,20 +287,30 @@
       });
     }
 
+    if (options.index) {
+      if (context._index_key_list.indexOf(options.index.key) === -1) {
+        throw new jIO.util.jIOError(
+          "IndexedDB: unsupported index '" + options.index.key + "'",
+          400
+        );
+      }
+      key = INDEX_PREFIX + options.index.key;
+      value = options.index.value;
+    }
+
     return new RSVP.Queue()
       .push(function () {
         return waitForOpenIndexedDB(context, function (db) {
           return waitForTransaction(db, ["metadata"], "readonly",
                                     function (tx) {
-              var key = "_id";
               if (options.include_docs === true) {
                 return waitForAllSynchronousCursor(
-                  tx.objectStore("metadata").index(key).openCursor(),
+                  tx.objectStore("metadata").index(key).openCursor(value),
                   pushIncludedMetadata
                 );
               }
               return waitForAllSynchronousCursor(
-                tx.objectStore("metadata").index(key).openKeyCursor(),
+                tx.objectStore("metadata").index(key).openKeyCursor(value),
                 pushMetadata
               );
             });

test/jio.storage/indexeddbstorage.tests.js

@@ -700,6 +700,78 @@
       });
   });
 
+  test("Unhandled index", function () {
+    var context = this;
+    stop();
+    expect(3);
+
+    deleteIndexedDB(context.jio)
+      .then(function () {
+        return context.jio.allDocs({index: {key: 'a', value: '3'}});
+      })
+      .fail(function (error) {
+        ok(error instanceof jIO.util.jIOError);
+        equal(
+          error.message,
+          "IndexedDB: unsupported index 'a'"
+        );
+        equal(error.status_code, 400);
+      })
+      .fail(function (error) {
+        ok(false, error);
+      })
+      .always(function () {
+        start();
+      });
+  });
+
+  test("Handled index", function () {
+    var context = this;
+    this.jio = jIO.createJIO({
+      type: "indexeddb",
+      database: "qunit",
+      index_key_list: ['foo']
+    });
+    stop();
+    expect(1);
+
+    deleteIndexedDB(context.jio)
+      .then(function () {
+        return RSVP.all([
+          context.jio.put("1", {"foo": "bar"}),
+          context.jio.put("2", {"foo": "bar2"}),
+          context.jio.put("3", {"foo2": "bar"}),
+          context.jio.put("4", {"foo": "bar"})
+        ]);
+      })
+      .then(function () {
+        return context.jio.allDocs({index: {key: 'foo', value: 'bar'}});
+      })
+      .then(function (result) {
+        deepEqual(result, {
+          "data": {
+            "rows": [
+              {
+                "id": "1",
+                "value": {}
+              },
+              {
+                "id": "4",
+                "value": {}
+              }
+            ],
+            "total_rows": 2
+          }
+        });
+      })
+      .fail(function (error) {
+        ok(false, error);
+      })
+      .always(function () {
+        start();
+      });
+  });
+
   /////////////////////////////////////////////////////////////////
   // indexeddbStorage.get
   /////////////////////////////////////////////////////////////////