Commit 30be9a4c authored by Xiaowu Zhang's avatar Xiaowu Zhang

add {get,put,remove}Attachment in indexedDB Storage

parent cf895161
...@@ -573,6 +573,181 @@ ...@@ -573,6 +573,181 @@
}); });
}; };
/**
* Add an attachment to a document
*
* @param {Object} command The JIO command
* @param {Object} metadata The data
*/
IndexedDBStorage.prototype.putAttachment = function (command, metadata) {
var jio_storage = this,
transaction,
global_db,
BlobInfo,
digest;
new RSVP.Queue()
.push(jIO.util.readBlobAsBinaryString(metadata._blob).
then(function (e) {
digest = jIO.util.makeBinaryStringDigest(e.target.result);
BlobInfo = {
"content_type": metadata._blob.type,
"digest": digest,
"length": metadata._blob.size
};
}, function () {
command.error("conflict", "broken blob",
"Cannot read data to put");
}))
.push(function () {
return openIndexedDB(jio_storage._database_name);
})
.push(function (db) {
global_db = db;
transaction = db.transaction(["attachment",
"blob"], "readwrite");
return promiseResearch(transaction, metadata._id, "attachment", "_id");
})
.push(function (researchResult) {
if (researchResult.result === undefined) {
throw ({"status": 404, "reason": "Not Found",
"message": "indexeddbStorage unable to put attachment"});
}
//update attachment
researchResult.result._attachment = researchResult.result._attachment
|| {};
researchResult.result._attachment[metadata._attachment] =
BlobInfo;
return putIndexedDB(researchResult.store, researchResult.result);
})
.push(function () {
//put in blob
var store = transaction.objectStore("blob");
return putIndexedDB(store, {"_id": metadata._id,
"_attachment" : metadata._attachment,
"blob": metadata._blob});
})
.push(function () {
return ({"digest": digest});
})
.push(undefined, function (error) {
// Check if transaction is ongoing, if so, abort it
if (transaction !== undefined) {
transaction.abort();
}
if (global_db !== undefined) {
global_db.close();
}
throw error;
})
.push(command.success, command.error, command.notify);
};
/**
* Retriev a document attachment
*
* @param {Object} command The JIO command
* @param {Object} param The command parameter
*/
IndexedDBStorage.prototype.getAttachment = function (command, param) {
var jio_storage = this,
transaction,
global_db,
_id_attachment = [param._id, param._attachment];
new RSVP.Queue()
.push(function () {
return openIndexedDB(jio_storage._database_name);
})
.push(function (db) {
global_db = db;
transaction = db.transaction(["blob"], "readwrite");
//check if the attachment exists
return promiseResearch(transaction, _id_attachment,
"blob", "_id_attachment");
})
.push(function (researchResult) {
if (researchResult.result === undefined) {
throw ({"status": 404, "reason": "missing attachment",
"message": "IndexeddbStorage, unable to get attachment."});
}
return getIndexedDB(researchResult.store, _id_attachment);
})
.push(function (result) {
//get data
return ({ "data": result.blob});
})
.push(undefined, function (error) {
// Check if transaction is ongoing, if so, abort it
if (transaction !== undefined) {
transaction.abort();
}
if (global_db !== undefined) {
global_db.close();
}
throw error;
})
.push(command.success, command.error, command.notify);
};
/**
* Remove an attachment
*
* @method removeAttachment
* @param {Object} command The JIO command
* @param {Object} param The command parameters
*/
IndexedDBStorage.prototype.removeAttachment = function (command, param) {
var jio_storage = this,
transaction,
global_db,
_id_attachment = [param._id, param._attachment];
new RSVP.Queue()
.push(function () {
return openIndexedDB(jio_storage._database_name);
})
.push(function (db) {
global_db = db;
transaction = db.transaction(["attachment", "blob"], "readwrite");
//check if the attachment exists
return promiseResearch(transaction, _id_attachment,
"blob", "_id_attachment");
})
.push(function (researchResult) {
if (researchResult.result === undefined) {
throw ({"status": 404, "reason": "missing attachment",
"message":
"IndexeddbStorage, document attachment not found."});
}
return removeIndexedDB(researchResult.store, _id_attachment);
})
.push(function () {
//updata attachment
var store = transaction.objectStore("attachment");
return getIndexedDB(store, param._id);
})
.push(function (result) {
delete result._attachment[param._attachment];
var store = transaction.objectStore("attachment");
return putIndexedDB(store, result);
})
.push(function () {
return ({ "status": 204 });
})
.push(undefined, function (error) {
// Check if transaction is ongoing, if so, abort it
if (transaction !== undefined) {
transaction.abort();
}
if (global_db !== undefined) {
global_db.close();
}
throw error;
})
.push(command.success, command.error, command.notify);
};
IndexedDBStorage.prototype.allDocs = function (command, param, option) { IndexedDBStorage.prototype.allDocs = function (command, param, option) {
/*jslint unparam: true */ /*jslint unparam: true */
this.createDBIfNecessary(). this.createDBIfNecessary().
......
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