mapping storage: create this storage

src/jio.storage/mappingstorage.js

+/*jslint indent:2, maxlen: 80, nomen: true */
+/*global jIO */
+(function (jIO) {
+  "use strict";
+
+  function MappingStorage(spec) {
+    this._mapping_dict = spec.mapping_dict || {};
+    this._default_dict = spec.default_dict || {};
+    this._sub_storage = jIO.createJIO(spec.sub_storage);
+  }
+
+  MappingStorage.prototype._getSubStorageId = function (index) {
+    var option = {};
+    option.query = this._mapping_dict.id.equal + ': "' + index + '"';
+    return this._sub_storage.allDocs(option)
+      .push(function (data) {
+        return data.data.rows[0].id;
+      });
+  };
+
+  MappingStorage.prototype._mapDocFromStorage = function (object) {
+    var result = {},
+      that = this,
+      prop;
+    for (prop in that._mapping_dict) {
+      if (that._mapping_dict.hasOwnProperty(prop)) {
+        if (prop !== "id") {
+          result[prop] = object[that._mapping_dict[prop].equal];
+        }
+      }
+    }
+    return result;
+  };
+
+  MappingStorage.prototype.get = function (index) {
+    var that = this;
+    if (this._mapping_dict.id === undefined ||
+        this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.get(index)
+        .push(function (result) {
+          return that._mapDocFromStorage(result);
+        });
+    }
+    return this._getSubStorageId(index)
+      .push(function (id) {
+        return that._sub_storage.get(id);
+      })
+      .push(function (result) {
+        return that._mapDocFromStorage(result);
+      });
+  };
+
+  MappingStorage.prototype.put = function (index, doc) {
+    var prop,
+      doc_mapped = JSON.parse(JSON.stringify(this._default_dict));
+    for (prop in doc) {
+      if (doc.hasOwnProperty(prop)) {
+        doc_mapped[this._mapping_dict[prop].equal] = doc[prop];
+      }
+    }
+    if (this._mapping_dict.id === undefined ||
+         this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.put(index, doc_mapped);
+    }
+    doc_mapped[this._mapping_dict.id.equal] = index;
+    return this._sub_storage.post(doc_mapped)
+      .push(function () {
+        return index;
+      });
+  };
+
+  MappingStorage.prototype.remove = function (index) {
+    var that = this;
+    if (this._mapping_dict.id === undefined
+        || this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.remove.apply(this._sub_storage,
+        arguments);
+    }
+    return this._getSubStorageId(index)
+      .push(function (id) {
+        return that._sub_storage.remove(id);
+      })
+      .push(function () {
+        return index;
+      });
+  };
+
+  MappingStorage.prototype.putAttachment = function (doc_id) {
+    var that = this;
+    if (this._mapping_dict.id === undefined
+        || this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.putAttachment.apply(this._sub_storage,
+        arguments);
+    }
+    return this._getSubStorageId(doc_id)
+      .push(function (id) {
+        doc_id = id;
+        return that._sub_storage.putAttachment.apply(that._sub_storage,
+          arguments);
+      });
+  };
+
+  MappingStorage.prototype.getAttachment = function (doc_id) {
+    var that = this;
+    if (this._mapping_dict.id === undefined
+        || this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.getAttachment.apply(this._sub_storage,
+        arguments);
+    }
+    return this._getSubStorageId(doc_id)
+      .push(function (id) {
+        doc_id = id;
+        return that._sub_storage.getAttachment.apply(that._sub_storage,
+          arguments);
+      });
+  };
+
+  MappingStorage.prototype.removeAttachment = function (doc_id) {
+    var that = this;
+    if (this._mapping_dict.id === undefined
+        || this._mapping_dict.id.equal === "id") {
+      return this._sub_storage.removeAttachment.apply(this._sub_storage,
+        arguments);
+    }
+    return this._getSubStorageId(doc_id)
+      .push(function (id) {
+        doc_id = id;
+        return that._sub_storage.removeAttachment.apply(that._sub_storage,
+          arguments);
+      });
+  };
+
+  MappingStorage.prototype.hasCapacity = function () {
+    return this._sub_storage.hasCapacity.apply(this._sub_storage, arguments);
+  };
+
+  MappingStorage.prototype.buildQuery = function (option) {
+    var that = this, i, select_list = [], sort_on = [], query;
+
+    function mapQuery(one_query) {
+      var i, query_list = [];
+      if (one_query.type === "complex") {
+        for (i = 0; i < one_query.query_list.length; i += 1) {
+          query_list.push(mapQuery(one_query.query_list[i]));
+        }
+        return {
+          operator: one_query.operator,
+          query_list: query_list,
+          type: "complex"
+        };
+      }
+      return {
+        key: that._mapping_dict[one_query.key].equal,
+        type: "simple",
+        value: one_query.value
+      };
+    }
+
+    if (option.sort_on !== undefined) {
+      for (i = 0; i < option.sort_on.length; i += 1) {
+        sort_on.push([this._mapping_dict[option.sort_on[i][0]].equal,
+          option.sort_on[i][1]]);
+      }
+    }
+    if (option.select_list !== undefined) {
+      for (i = 0; i < option.select_list.length; i += 1) {
+        select_list.push(this._mapping_dict[option.select_list[i]].equal);
+      }
+    }
+    if (this._mapping_dict.id !== undefined
+        && this._mapping_dict.id.equal !== "id") {
+      select_list.push(this._mapping_dict.id.equal);
+    }
+    query = jIO.Query.parseStringToObject(option.query);
+    return this._sub_storage.allDocs(
+      {
+        query: mapQuery(query),
+        select_list: select_list,
+        sort_on: sort_on,
+        limit: option.limit,
+        include_docs: option.include_docs || false
+      }
+    )
+      .push(function (result) {
+        for (i = 0; i < result.data.total_rows; i += 1) {
+          if (that._mapping_dict.id !== undefined
+              && that._mapping_dict.id.equal !== "id") {
+            result.data.rows[i].id =
+              result.data.rows[i].value[that._mapping_dict.id.equal];
+            delete result.data.rows[i].value[that._mapping_dict.id.equal];
+          }
+          result.data.rows[i].value =
+            that._mapDocFromStorage(result.data.rows[i].value);
+        }
+        return result.data.rows;
+      });
+  };
+
+  jIO.addStorage('mapping', MappingStorage);
+
+}(jIO));
\ No newline at end of file

test/tests.html

@@ -28,7 +28,6 @@
   <script src="queries/key-jiodate.tests.js"></script>
 
   <!--script src="queries/key-localstorage.tests.js"></script-->
-
   <script src="jio.storage/memorystorage.tests.js"></script>
   <script src="jio.storage/querystorage.tests.js"></script>
   <script src="jio.storage/localstorage.tests.js"></script>
@@ -45,7 +44,7 @@
   <script src="jio.storage/replicatestorage_fastrepair.tests.js"></script>
   <script src="jio.storage/replicatestorage_fastrepairattachment.tests.js"></script>
   <script src="jio.storage/shastorage.tests.js"></script>
-
+  <script src="jio.storage/mappingstorage.tests.js"></script>
   <!--script src="jio.storage/qiniustorage.tests.js"></script-->
   <!--script src="jio.storage/indexstorage.tests.js"></script-->
   <script src="jio.storage/cryptstorage.tests.js"></script>