mirror of
https://git.tt-rss.org/fox/tt-rss.git
synced 2025-10-31 11:51:17 +01:00
545 lines
16 KiB
JavaScript
545 lines
16 KiB
JavaScript
define("dojo/data/ObjectStore", ["../_base/lang", "../Evented", "../_base/declare", "../_base/Deferred", "../_base/array",
|
|
"../_base/connect", "../regexp"
|
|
], function(lang, Evented, declare, Deferred, array, connect, regexp){
|
|
|
|
// module:
|
|
// dojo/data/ObjectStore
|
|
|
|
function convertRegex(character){
|
|
return character == '*' ? '.*' : character == '?' ? '.' : character;
|
|
}
|
|
return declare("dojo.data.ObjectStore", [Evented],{
|
|
// summary:
|
|
// A Dojo Data implementation that wraps Dojo object stores for backwards
|
|
// compatibility.
|
|
|
|
objectStore: null,
|
|
constructor: function(options){
|
|
// options:
|
|
// The configuration information to pass into the data store.
|
|
//
|
|
// - options.objectStore:
|
|
//
|
|
// The object store to use as the source provider for this data store
|
|
|
|
this._dirtyObjects = [];
|
|
if(options.labelAttribute){
|
|
// accept the old labelAttribute to make it easier to switch from old data stores
|
|
options.labelProperty = options.labelAttribute;
|
|
}
|
|
lang.mixin(this, options);
|
|
},
|
|
labelProperty: "label",
|
|
|
|
getValue: function(/*Object*/ item, /*String*/property, /*value?*/defaultValue){
|
|
// summary:
|
|
// Gets the value of an item's 'property'
|
|
// item:
|
|
// The item to get the value from
|
|
// property:
|
|
// property to look up value for
|
|
// defaultValue:
|
|
// the default value
|
|
|
|
return typeof item.get === "function" ? item.get(property) :
|
|
property in item ?
|
|
item[property] : defaultValue;
|
|
},
|
|
getValues: function(item, property){
|
|
// summary:
|
|
// Gets the value of an item's 'property' and returns
|
|
// it. If this value is an array it is just returned,
|
|
// if not, the value is added to an array and that is returned.
|
|
// item: Object
|
|
// property: String
|
|
// property to look up value for
|
|
|
|
var val = this.getValue(item,property);
|
|
return val instanceof Array ? val : val === undefined ? [] : [val];
|
|
},
|
|
|
|
getAttributes: function(item){
|
|
// summary:
|
|
// Gets the available attributes of an item's 'property' and returns
|
|
// it as an array.
|
|
// item: Object
|
|
|
|
var res = [];
|
|
for(var i in item){
|
|
if(item.hasOwnProperty(i) && !(i.charAt(0) == '_' && i.charAt(1) == '_')){
|
|
res.push(i);
|
|
}
|
|
}
|
|
return res;
|
|
},
|
|
|
|
hasAttribute: function(item,attribute){
|
|
// summary:
|
|
// Checks to see if item has attribute
|
|
// item: Object
|
|
// The item to check
|
|
// attribute: String
|
|
// The attribute to check
|
|
return attribute in item;
|
|
},
|
|
|
|
containsValue: function(item, attribute, value){
|
|
// summary:
|
|
// Checks to see if 'item' has 'value' at 'attribute'
|
|
// item: Object
|
|
// The item to check
|
|
// attribute: String
|
|
// The attribute to check
|
|
// value: Anything
|
|
// The value to look for
|
|
return array.indexOf(this.getValues(item,attribute),value) > -1;
|
|
},
|
|
|
|
|
|
isItem: function(item){
|
|
// summary:
|
|
// Checks to see if the argument is an item
|
|
// item: Object
|
|
// The item to check
|
|
|
|
// we have no way of determining if it belongs, we just have object returned from
|
|
// service queries
|
|
return (typeof item == 'object') && item && !(item instanceof Date);
|
|
},
|
|
|
|
isItemLoaded: function(item){
|
|
// summary:
|
|
// Checks to see if the item is loaded.
|
|
// item: Object
|
|
// The item to check
|
|
|
|
return item && typeof item.load !== "function";
|
|
},
|
|
|
|
loadItem: function(args){
|
|
// summary:
|
|
// Loads an item and calls the callback handler. Note, that this will call the callback
|
|
// handler even if the item is loaded. Consequently, you can use loadItem to ensure
|
|
// that an item is loaded is situations when the item may or may not be loaded yet.
|
|
// If you access a value directly through property access, you can use this to load
|
|
// a lazy value as well (doesn't need to be an item).
|
|
// args: Object
|
|
// See dojo/data/api/Read.fetch()
|
|
// example:
|
|
// | store.loadItem({
|
|
// | item: item, // this item may or may not be loaded
|
|
// | onItem: function(item){
|
|
// | // do something with the item
|
|
// | }
|
|
// | });
|
|
|
|
var item;
|
|
if(typeof args.item.load === "function"){
|
|
Deferred.when(args.item.load(), function(result){
|
|
item = result; // in synchronous mode this can allow loadItem to return the value
|
|
var func = result instanceof Error ? args.onError : args.onItem;
|
|
if(func){
|
|
func.call(args.scope, result);
|
|
}
|
|
});
|
|
}else if(args.onItem){
|
|
// even if it is already loaded, we will use call the callback, this makes it easier to
|
|
// use when it is not known if the item is loaded (you can always safely call loadItem).
|
|
args.onItem.call(args.scope, args.item);
|
|
}
|
|
return item;
|
|
},
|
|
close: function(request){
|
|
// summary:
|
|
// See dojo/data/api/Read.close()
|
|
return request && request.abort && request.abort();
|
|
},
|
|
fetch: function(args){
|
|
// summary:
|
|
// See dojo/data/api/Read.fetch()
|
|
|
|
args = lang.delegate(args, args && args.queryOptions);
|
|
var self = this;
|
|
var scope = args.scope || self;
|
|
var query = args.query;
|
|
if(typeof query == "object"){ // can be null, but that is ignore by for-in
|
|
query = lang.delegate(query); // don't modify the original
|
|
for(var i in query){
|
|
// find any strings and convert them to regular expressions for wildcard support
|
|
var required = query[i];
|
|
if(typeof required == "string"){
|
|
query[i] = RegExp("^" + regexp.escapeString(required, "*?\\").replace(/\\.|\*|\?/g, convertRegex) + "$", args.ignoreCase ? "mi" : "m");
|
|
query[i].toString = (function(original){
|
|
return function(){
|
|
return original;
|
|
};
|
|
})(required);
|
|
}
|
|
}
|
|
}
|
|
|
|
var results = this.objectStore.query(query, args);
|
|
Deferred.when(results.total, function(totalCount){
|
|
Deferred.when(results, function(results){
|
|
if(args.onBegin){
|
|
args.onBegin.call(scope, totalCount || results.length, args);
|
|
}
|
|
if(args.onItem){
|
|
for(var i=0; i<results.length;i++){
|
|
args.onItem.call(scope, results[i], args);
|
|
}
|
|
}
|
|
if(args.onComplete){
|
|
args.onComplete.call(scope, args.onItem ? null : results, args);
|
|
}
|
|
return results;
|
|
}, errorHandler);
|
|
}, errorHandler);
|
|
function errorHandler(error){
|
|
if(args.onError){
|
|
args.onError.call(scope, error, args);
|
|
}
|
|
}
|
|
args.abort = function(){
|
|
// abort the request
|
|
if(results.cancel){
|
|
results.cancel();
|
|
}
|
|
};
|
|
if(results.observe){
|
|
if(this.observing){
|
|
// if we were previously observing, cancel the last time to avoid multiple notifications. Just the best we can do for the impedance mismatch between APIs
|
|
this.observing.cancel();
|
|
}
|
|
this.observing = results.observe(function(object, removedFrom, insertedInto){
|
|
if(array.indexOf(self._dirtyObjects, object) == -1){
|
|
if(removedFrom == -1){
|
|
self.onNew(object);
|
|
}
|
|
else if(insertedInto == -1){
|
|
self.onDelete(object);
|
|
}
|
|
else{
|
|
for(var i in object){
|
|
if(i != self.objectStore.idProperty){
|
|
self.onSet(object, i, null, object[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}, true);
|
|
}
|
|
this.onFetch(results);
|
|
args.store = this;
|
|
return args;
|
|
},
|
|
getFeatures: function(){
|
|
// summary:
|
|
// return the store feature set
|
|
|
|
return {
|
|
"dojo.data.api.Read": !!this.objectStore.get,
|
|
"dojo.data.api.Identity": true,
|
|
"dojo.data.api.Write": !!this.objectStore.put,
|
|
"dojo.data.api.Notification": true
|
|
};
|
|
},
|
|
|
|
getLabel: function(/* dojo/data/api/Item */ item){
|
|
// summary:
|
|
// See dojo/data/api/Read.getLabel()
|
|
if(this.isItem(item)){
|
|
return this.getValue(item,this.labelProperty); //String
|
|
}
|
|
return undefined; //undefined
|
|
},
|
|
|
|
getLabelAttributes: function(/* dojo/data/api/Item */ item){
|
|
// summary:
|
|
// See dojo/data/api/Read.getLabelAttributes()
|
|
return [this.labelProperty]; //array
|
|
},
|
|
|
|
//Identity API Support
|
|
|
|
|
|
getIdentity: function(item){
|
|
// summary:
|
|
// returns the identity of the given item
|
|
// See dojo/data/api/Read.getIdentity()
|
|
return this.objectStore.getIdentity ? this.objectStore.getIdentity(item) : item[this.objectStore.idProperty || "id"];
|
|
},
|
|
|
|
getIdentityAttributes: function(item){
|
|
// summary:
|
|
// returns the attributes which are used to make up the
|
|
// identity of an item. Basically returns this.objectStore.idProperty
|
|
// See dojo/data/api/Read.getIdentityAttributes()
|
|
|
|
return [this.objectStore.idProperty];
|
|
},
|
|
|
|
fetchItemByIdentity: function(args){
|
|
// summary:
|
|
// fetch an item by its identity, by looking in our index of what we have loaded
|
|
var item;
|
|
Deferred.when(this.objectStore.get(args.identity),
|
|
function(result){
|
|
item = result;
|
|
args.onItem.call(args.scope, result);
|
|
},
|
|
function(error){
|
|
args.onError.call(args.scope, error);
|
|
}
|
|
);
|
|
return item;
|
|
},
|
|
|
|
newItem: function(data, parentInfo){
|
|
// summary:
|
|
// adds a new item to the store at the specified point.
|
|
// Takes two parameters, data, and options.
|
|
// data: Object
|
|
// The data to be added in as an item.
|
|
// data: Object
|
|
// See dojo/data/api/Write.newItem()
|
|
|
|
if(parentInfo){
|
|
// get the previous value or any empty array
|
|
var values = this.getValue(parentInfo.parent,parentInfo.attribute,[]);
|
|
// set the new value
|
|
values = values.concat([data]);
|
|
data.__parent = values;
|
|
this.setValue(parentInfo.parent, parentInfo.attribute, values);
|
|
}
|
|
this._dirtyObjects.push({object:data, save: true});
|
|
this.onNew(data);
|
|
return data;
|
|
},
|
|
deleteItem: function(item){
|
|
// summary:
|
|
// deletes item and any references to that item from the store.
|
|
// item:
|
|
// item to delete
|
|
|
|
// If the desire is to delete only one reference, unsetAttribute or
|
|
// setValue is the way to go.
|
|
this.changing(item, true);
|
|
|
|
this.onDelete(item);
|
|
},
|
|
setValue: function(item, attribute, value){
|
|
// summary:
|
|
// sets 'attribute' on 'item' to 'value'
|
|
// See dojo/data/api/Write.setValue()
|
|
|
|
var old = item[attribute];
|
|
this.changing(item);
|
|
item[attribute]=value;
|
|
this.onSet(item,attribute,old,value);
|
|
},
|
|
setValues: function(item, attribute, values){
|
|
// summary:
|
|
// sets 'attribute' on 'item' to 'value' value
|
|
// must be an array.
|
|
// See dojo/data/api/Write.setValues()
|
|
|
|
if(!lang.isArray(values)){
|
|
throw new Error("setValues expects to be passed an Array object as its value");
|
|
}
|
|
this.setValue(item,attribute,values);
|
|
},
|
|
|
|
unsetAttribute: function(item, attribute){
|
|
// summary:
|
|
// unsets 'attribute' on 'item'
|
|
// See dojo/data/api/Write.unsetAttribute()
|
|
|
|
this.changing(item);
|
|
var old = item[attribute];
|
|
delete item[attribute];
|
|
this.onSet(item,attribute,old,undefined);
|
|
},
|
|
|
|
changing: function(object,_deleting){
|
|
// summary:
|
|
// adds an object to the list of dirty objects. This object
|
|
// contains a reference to the object itself as well as a
|
|
// cloned and trimmed version of old object for use with
|
|
// revert.
|
|
// object: Object
|
|
// Indicates that the given object is changing and should be marked as
|
|
// dirty for the next save
|
|
// _deleting: [private] Boolean
|
|
|
|
object.__isDirty = true;
|
|
//if an object is already in the list of dirty objects, don't add it again
|
|
//or it will overwrite the premodification data set.
|
|
for(var i=0; i<this._dirtyObjects.length; i++){
|
|
var dirty = this._dirtyObjects[i];
|
|
if(object==dirty.object){
|
|
if(_deleting){
|
|
// we are deleting, no object is an indicator of deletiong
|
|
dirty.object = false;
|
|
if(!this._saveNotNeeded){
|
|
dirty.save = true;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
var old = object instanceof Array ? [] : {};
|
|
for(i in object){
|
|
if(object.hasOwnProperty(i)){
|
|
old[i] = object[i];
|
|
}
|
|
}
|
|
this._dirtyObjects.push({object: !_deleting && object, old: old, save: !this._saveNotNeeded});
|
|
},
|
|
|
|
save: function(kwArgs){
|
|
// summary:
|
|
// Saves the dirty data using object store provider. See dojo/data/api/Write for API.
|
|
// kwArgs:
|
|
// - kwArgs.global:
|
|
// This will cause the save to commit the dirty data for all
|
|
// ObjectStores as a single transaction.
|
|
//
|
|
// - kwArgs.revertOnError:
|
|
// This will cause the changes to be reverted if there is an
|
|
// error on the save. By default a revert is executed unless
|
|
// a value of false is provide for this parameter.
|
|
//
|
|
// - kwArgs.onError:
|
|
// Called when an error occurs in the commit
|
|
//
|
|
// - kwArgs.onComplete:
|
|
// Called when an the save/commit is completed
|
|
|
|
kwArgs = kwArgs || {};
|
|
var result, actions = [];
|
|
var savingObjects = [];
|
|
var self = this;
|
|
var dirtyObjects = this._dirtyObjects;
|
|
var left = dirtyObjects.length;// this is how many changes are remaining to be received from the server
|
|
try{
|
|
connect.connect(kwArgs,"onError",function(){
|
|
if(kwArgs.revertOnError !== false){
|
|
var postCommitDirtyObjects = dirtyObjects;
|
|
dirtyObjects = savingObjects;
|
|
self.revert(); // revert if there was an error
|
|
self._dirtyObjects = postCommitDirtyObjects;
|
|
}
|
|
else{
|
|
self._dirtyObjects = dirtyObjects.concat(savingObjects);
|
|
}
|
|
});
|
|
if(this.objectStore.transaction){
|
|
var transaction = this.objectStore.transaction();
|
|
}
|
|
for(var i = 0; i < dirtyObjects.length; i++){
|
|
var dirty = dirtyObjects[i];
|
|
var object = dirty.object;
|
|
var old = dirty.old;
|
|
delete object.__isDirty;
|
|
if(object){
|
|
result = this.objectStore.put(object, {overwrite: !!old});
|
|
}
|
|
else if(typeof old != "undefined"){
|
|
result = this.objectStore.remove(this.getIdentity(old));
|
|
}
|
|
savingObjects.push(dirty);
|
|
dirtyObjects.splice(i--,1);
|
|
Deferred.when(result, function(value){
|
|
if(!(--left)){
|
|
if(kwArgs.onComplete){
|
|
kwArgs.onComplete.call(kwArgs.scope, actions);
|
|
}
|
|
}
|
|
},function(value){
|
|
|
|
// on an error we want to revert, first we want to separate any changes that were made since the commit
|
|
left = -1; // first make sure that success isn't called
|
|
kwArgs.onError.call(kwArgs.scope, value);
|
|
});
|
|
|
|
}
|
|
if(transaction){
|
|
transaction.commit();
|
|
}
|
|
}catch(e){
|
|
kwArgs.onError.call(kwArgs.scope, value);
|
|
}
|
|
},
|
|
|
|
revert: function(){
|
|
// summary:
|
|
// returns any modified data to its original state prior to a save();
|
|
|
|
var dirtyObjects = this._dirtyObjects;
|
|
for(var i = dirtyObjects.length; i > 0;){
|
|
i--;
|
|
var dirty = dirtyObjects[i];
|
|
var object = dirty.object;
|
|
var old = dirty.old;
|
|
if(object && old){
|
|
// changed
|
|
for(var j in old){
|
|
if(old.hasOwnProperty(j) && object[j] !== old[j]){
|
|
this.onSet(object, j, object[j], old[j]);
|
|
object[j] = old[j];
|
|
}
|
|
}
|
|
for(j in object){
|
|
if(!old.hasOwnProperty(j)){
|
|
this.onSet(object, j, object[j]);
|
|
delete object[j];
|
|
}
|
|
}
|
|
}else if(!old){
|
|
// was an addition, remove it
|
|
this.onDelete(object);
|
|
}else{
|
|
// was a deletion, we will add it back
|
|
this.onNew(old);
|
|
}
|
|
delete (object || old).__isDirty;
|
|
dirtyObjects.splice(i, 1);
|
|
}
|
|
|
|
},
|
|
isDirty: function(item){
|
|
// summary:
|
|
// returns true if the item is marked as dirty or true if there are any dirty items
|
|
// item: Object
|
|
// The item to check
|
|
if(!item){
|
|
return !!this._dirtyObjects.length;
|
|
}
|
|
return item.__isDirty;
|
|
},
|
|
|
|
// Notification Support
|
|
|
|
onSet: function(){
|
|
// summary:
|
|
// See dojo/data/api/Notification.onSet()
|
|
},
|
|
onNew: function(){
|
|
// summary:
|
|
// See dojo/data/api/Notification.onNew()
|
|
},
|
|
onDelete: function(){
|
|
// summary:
|
|
// See dojo/data/api/Notification.onDelete()
|
|
},
|
|
// an extra to get result sets
|
|
onFetch: function(results){
|
|
// summary:
|
|
// Called when a fetch occurs
|
|
}
|
|
|
|
}
|
|
);
|
|
});
|