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Commit a8f62949 authored by Sven Franck's avatar Sven Franck
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jslint pass localstorage.js

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src/jio.storage/localstorage.js
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/*jslint indent: 2, maxlen: 80, sloppy: true, nomen: true */
/*global jIO: true, localStorage: true, setTimeout: true */
/**
* JIO Local Storage. Type = 'local'.
* Local browser "database" storage.
*/
jIO.addStorageType('local', function (spec, my) {
spec = spec || {};
var that, priv, localstorage;
that = my.basicStorage(spec, my);
priv = {};
spec = spec || {};
var that, priv, localstorage;
that = my.basicStorage(spec, my);
priv = {};
/*
* Wrapper for the localStorage used to simplify instion of any kind of
* values
*/
localstorage = {
getItem: function (item) {
var value = localStorage.getItem(item);
return value === null? null: JSON.parse(value);
},
setItem: function (item, value) {
return localStorage.setItem(item, JSON.stringify(value));
},
removeItem: function (item) {
return localStorage.removeItem(item);
}
};
/*
* Wrapper for the localStorage used to simplify instion of any kind of
* values
*/
localstorage = {
getItem: function (item) {
var value = localStorage.getItem(item);
return value === null ? null : JSON.parse(value);
},
setItem: function (item, value) {
return localStorage.setItem(item, JSON.stringify(value));
},
removeItem: function (item) {
return localStorage.removeItem(item);
}
};
// attributes
priv.username = spec.username || '';
priv.application_name = spec.application_name || 'untitled';
// attributes
priv.username = spec.username || '';
priv.application_name = spec.application_name || 'untitled';
priv.localpath = 'jio/localstorage/' +
priv.username + '/' + priv.application_name;
priv.localpath = 'jio/localstorage/' + priv.username + '/' +
priv.application_name;
// ==================== Tools ====================
/**
* Update [doc] the document object and remove [doc] keys
* which are not in [new_doc]. It only changes [doc] keys not starting
* with an underscore.
* ex: doc: {key:value1,_key:value2} with
* new_doc: {key:value3,_key:value4} updates
* doc: {key:value3,_key:value2}.
* @param {object} doc The original document object.
* @param {object} new_doc The new document object
*/
priv.documentObjectUpdate = function (doc, new_doc) {
var k;
for (k in doc) {
if (k[0] !== '_') {
delete doc[k];
}
// ==================== Tools ====================
/**
* Update [doc] the document object and remove [doc] keys
* which are not in [new_doc]. It only changes [doc] keys not starting
* with an underscore.
* ex: doc: {key:value1,_key:value2} with
* new_doc: {key:value3,_key:value4} updates
* doc: {key:value3,_key:value2}.
* @param {object} doc The original document object.
* @param {object} new_doc The new document object
*/
priv.documentObjectUpdate = function (doc, new_doc) {
var k;
for (k in doc) {
if (doc.hasOwnProperty(k)) {
if (k[0] !== '_') {
delete doc[k];
}
for (k in new_doc) {
if (k[0] !== '_') {
doc[k] = new_doc[k];
}
}
}
for (k in new_doc) {
if (new_doc.hasOwnProperty(k)) {
if (k[0] !== '_') {
doc[k] = new_doc[k];
}
};
}
}
};
/**
* Checks if an object has no enumerable keys
* @method objectIsEmpty
* @param {object} obj The object
* @return {boolean} true if empty, else false
*/
priv.objectIsEmpty = function (obj) {
var k;
for (k in obj) {
return false;
}
return true;
};
/**
* Checks if an object has no enumerable keys
* @method objectIsEmpty
* @param {object} obj The object
* @return {boolean} true if empty, else false
*/
priv.objectIsEmpty = function (obj) {
var k;
for (k in obj) {
if (obj.hasOwnProperty(k)) {
return false;
}
}
return true;
};
// ===================== overrides ======================
that.specToStore = function () {
return {
"application_name": priv.application_name,
"username": priv.username
};
// ===================== overrides ======================
that.specToStore = function () {
return {
"application_name": priv.application_name,
"username": priv.username
};
};
that.validateState = function() {
if (typeof priv.username === "string" &&
priv.username !== '') {
return '';
}
return 'Need at least one parameter: "username".';
};
that.validateState = function () {
if (typeof priv.username === "string" && priv.username !== '') {
return '';
}
return 'Need at least one parameter: "username".';
};
// ==================== commands ====================
/**
* Create a document in local storage.
* @method post
* @param {object} command The JIO command
*/
that.post = function (command) {
setTimeout (function () {
var doc = command.getDocId();
if (!(typeof doc === "string" && doc !== "")) {
that.error({
"status": 405,
"statusText": "Method Not Allowed",
"error": "method_not_allowed",
"message": "Cannot create document which id is undefined",
"reason": "Document id is undefined"
});
return;
}
doc = localstorage.getItem(
priv.localpath + "/" + doc);
if (doc === null) {
// the document does not exist
localstorage.setItem(
priv.localpath + "/" + command.getDocId(),
command.cloneDoc());
that.success({"ok":true,"id":command.getDocId()});
} else {
// the document already exists
that.error({
"status": 409,
"statusText": "Conflicts",
"error": "conflicts",
"message": "Cannot create a new document",
"reason": "Document already exists"
});
}
// ==================== commands ====================
/**
* Create a document in local storage.
* @method post
* @param {object} command The JIO command
*/
that.post = function (command) {
setTimeout(function () {
var doc = command.getDocId();
if (!(typeof doc === "string" && doc !== "")) {
that.error({
"status": 405,
"statusText": "Method Not Allowed",
"error": "method_not_allowed",
"message": "Cannot create document which id is undefined",
"reason": "Document id is undefined"
});
};
return;
}
doc = localstorage.getItem(priv.localpath + "/" + doc);
if (doc === null) {
// the document does not exist
localstorage.setItem(priv.localpath + "/" + command.getDocId(),
command.cloneDoc());
that.success({
"ok": true,
"id": command.getDocId()
});
} else {
// the document already exists
that.error({
"status": 409,
"statusText": "Conflicts",
"error": "conflicts",
"message": "Cannot create a new document",
"reason": "Document already exists"
});
}
});
};
/**
* Create or update a document in local storage.
* @method put
* @param {object} command The JIO command
*/
that.put = function (command) {
setTimeout(function () {
var doc;
doc = localstorage.getItem(
priv.localpath + "/" + command.getDocId());
if (doc === null) {
// the document does not exist
doc = command.cloneDoc();
} else {
// the document already exists
priv.documentObjectUpdate(doc, command.cloneDoc());
}
// write
localstorage.setItem(
priv.localpath + "/" + command.getDocId(),
doc);
that.success({"ok":true,"id":command.getDocId()});
/**
* Create or update a document in local storage.
* @method put
* @param {object} command The JIO command
*/
that.put = function (command) {
setTimeout(function () {
var doc;
doc = localstorage.getItem(priv.localpath + "/" + command.getDocId());
if (doc === null) {
// the document does not exist
doc = command.cloneDoc();
} else {
// the document already exists
priv.documentObjectUpdate(doc, command.cloneDoc());
}
// write
localstorage.setItem(priv.localpath + "/" + command.getDocId(), doc);
that.success({
"ok": true,
"id": command.getDocId()
});
});
};
/**
* Add an attachment to a document
* @method putAttachment
* @param {object} command The JIO command
*/
that.putAttachment = function (command) {
setTimeout(function () {
var doc;
doc = localstorage.getItem(priv.localpath + "/" + command.getDocId());
if (doc === null) {
// the document does not exist
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Impossible to add attachment",
"reason": "Document not found"
});
};
return;
}
// the document already exists
doc._attachments = doc._attachments || {};
doc._attachments[command.getAttachmentId()] = {
"content_type": command.getAttachmentMimeType(),
"digest": "md5-" + command.md5SumAttachmentData(),
"length": command.getAttachmentLength()
};
// upload data
localstorage.setItem(priv.localpath + "/" + command.getDocId() + "/" +
command.getAttachmentId(),
command.getAttachmentData());
// write document
localstorage.setItem(priv.localpath + "/" + command.getDocId(), doc);
that.success({
"ok": true,
"id": command.getDocId() + "/" + command.getAttachmentId()
});
});
};
/**
* Add an attachment to a document
* @method putAttachment
* @param {object} command The JIO command
*/
that.putAttachment = function (command) {
setTimeout(function () {
var doc;
doc = localstorage.getItem(
priv.localpath + "/" + command.getDocId());
if (doc === null) {
// the document does not exist
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Impossible to add attachment",
"reason": "Document not found"
});
return;
} else {
// the document already exists
doc["_attachments"] = doc["_attachments"] || {};
doc["_attachments"][command.getAttachmentId()] = {
"content_type": command.getAttachmentMimeType(),
"digest": "md5-"+command.md5SumAttachmentData(),
"length": command.getAttachmentLength()
};
/**
* Get a document or attachment
* @method get
* @param {object} command The JIO command
*/
that.get = function (command) {
setTimeout(function () {
var doc;
if (typeof command.getAttachmentId() === "string") {
// seeking for an attachment
doc = localstorage.getItem(priv.localpath + "/" + command.getDocId() +
"/" + command.getAttachmentId());
if (doc !== null) {
that.success(doc);
} else {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Cannot find the attachment",
"reason": "Attachment does not exist"
});
}
} else {
// seeking for a document
doc = localstorage.getItem(priv.localpath + "/" + command.getDocId());
if (doc !== null) {
that.success(doc);
} else {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Cannot find the document",
"reason": "Document does not exist"
});
}
}
});
};
/**
* Remove a document or attachment
* @method remove
* @param {object} command The JIO command
*/
that.remove = function (command) {
setTimeout(function () {
var doc, error, i, attachment_list;
error = function (word) {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": word + " not found",
"reason": "missing"
});
};
doc = localstorage.getItem(priv.localpath + "/" + command.getDocId());
if (typeof command.getAttachmentId() === "string") {
// remove attachment from document
if (doc !== null && typeof doc === "object" &&
typeof doc._attachments === "object") {
if (typeof doc._attachments[command.getAttachmentId()] ===
"object") {
delete doc._attachments[command.getAttachmentId()];
if (priv.objectIsEmpty(doc._attachments)) {
delete doc._attachments;
}
// upload data
localstorage.setItem(
priv.localpath + "/" + command.getDocId() + "/" +
command.getAttachmentId(),
command.getAttachmentData()
);
// write document
localstorage.setItem(
priv.localpath + "/" + command.getDocId(),
doc);
localstorage.setItem(priv.localpath + "/" + command.getDocId(),
doc);
localstorage.removeItem(priv.localpath + "/" + command.getDocId() +
"/" + command.getAttachmentId());
that.success({
"ok":true,
"id":command.getDocId()+"/"+command.getAttachmentId()
"ok": true,
"id": command.getDocId() + "/" + command.getAttachmentId()
});
});
};
/**
* Get a document or attachment
* @method get
* @param {object} command The JIO command
*/
that.get = function (command) {
setTimeout (function () {
var doc;
if (typeof command.getAttachmentId() === "string") {
// seeking for an attachment
doc = localstorage.getItem(
priv.localpath + "/" + command.getDocId() + "/" +
command.getAttachmentId());
if (doc !== null) {
that.success(doc);
} else {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Cannot find the attachment",
"reason": "Attachment does not exist"
});
}
} else {
// seeking for a document
doc = localstorage.getItem(
priv.localpath + "/" + command.getDocId());
if (doc !== null) {
that.success(doc);
} else {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": "Cannot find the document",
"reason": "Document does not exist"
});
}
}
});
};
/**
* Remove a document or attachment
* @method remove
* @param {object} command The JIO command
*/
that.remove = function (command) {
setTimeout (function () {
var doc, error;
error = function (word) {
that.error({
"status": 404,
"statusText": "Not Found",
"error": "not_found",
"message": word+" not found",
"reason": "missing"
});
};
doc = localstorage.getItem(
priv.localpath + "/" + command.getDocId());
if (typeof command.getAttachmentId() === "string") {
// remove attachment from document
if (doc !== null && typeof doc === "object" &&
typeof doc["_attachments"] === "object") {
if (typeof doc["_attachments"][
command.getAttachmentId()] === "object") {
delete doc["_attachments"][command.getAttachmentId()];
if (priv.objectIsEmpty(doc["_attachments"])) {
delete doc["_attachments"];
}
localstorage.setItem(
priv.localpath + "/" + command.getDocId(),
doc);
localstorage.removeItem(
priv.localpath + "/" + command.getDocId() + "/" +
command.getAttachmentId());
that.success({
"ok": true,
"id": command.getDocId()+"/"+
command.getAttachmentId()
});
} else {
error("Attachment");
}
} else {
error("Document");
}
} else {
// seeking for a document
var attachment_list = [], i;
if (doc !== null && typeof doc === "object") {
if (typeof doc["_attachments"] === "object") {
// prepare list of attachments
for (i in doc["_attachments"]) {
attachment_list.push(i);
}
}
} else {
return error("Document");
}
localstorage.removeItem(
priv.localpath + "/" + command.getDocId());
// delete all attachments
for (i = 0; i < attachment_list.length; i += 1) {
localstorage.removeItem(
priv.localpath+"/"+command.getDocId()+"/"+
attachment_list[i]);
}
that.success({
"ok": true,
"id": command.getDocId()
});
} else {
error("Attachment");
}
} else {
error("Document");
}
} else {
// seeking for a document
attachment_list = [];
if (doc !== null && typeof doc === "object") {
if (typeof doc._attachments === "object") {
// prepare list of attachments
for (i in doc._attachments) {
if (doc._attachments.hasOwnProperty(i)) {
attachment_list.push(i);
}
}
}
} else {
return error("Document");
}
localstorage.removeItem(priv.localpath + "/" + command.getDocId());
// delete all attachments
for (i = 0; i < attachment_list.length; i += 1) {
localstorage.removeItem(priv.localpath + "/" + command.getDocId() +
"/" + attachment_list[i]);
}
that.success({
"ok": true,
"id": command.getDocId()
});
};
}
});
};
/**
* Get all filenames belonging to a user from the document index
* @method allDocs
* @param {object} command The JIO command
*/
that.allDocs = function (command) {
setTimeout(function () {
that.error({
"status": 405,
"statusText": "Method Not Allowed",
"error": "method_not_allowed",
"message": "Your are not allowed to use this command",
"reason": "LocalStorage forbids AllDocs command executions"
});
});
};
/**
* Get all filenames belonging to a user from the document index
* @method allDocs
* @param {object} command The JIO command
*/
that.allDocs = function () {
setTimeout(function () {
that.error({
"status": 405,
"statusText": "Method Not Allowed",
"error": "method_not_allowed",
"message": "Your are not allowed to use this command",
"reason": "LocalStorage forbids AllDocs command executions"
});
});
};
return that;
});
return that;
});
\ No newline at end of file
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