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/*
* # Semantic - API
* http://github.com/jlukic/semantic-ui/
*
*
* Copyright 2013 Contributors
* Released under the MIT license
* http://opensource.org/licenses/MIT
*
*/
;(function ( $, window, document, undefined ) {
$.api = $.fn.api = function(parameters) {
var
settings = $.extend(true, {}, $.api.settings, parameters),
// if this keyword isn't a jQuery object, create one
context = (typeof this != 'function')
? this
: $('<div/>'),
// context defines the element used for loading/error state
$context = (settings.stateContext)
? $(settings.stateContext)
: $(context),
// module is the thing that initiates the api action, can be independent of context
$module = typeof this == 'object'
? $(context)
: $context,
element = this,
time = new Date().getTime(),
performance = [],
moduleSelector = $module.selector || '',
moduleNamespace = settings.namespace + '-module',
className = settings.className,
metadata = settings.metadata,
error = settings.error,
instance = $module.data(moduleNamespace),
query = arguments[0],
methodInvoked = (instance !== undefined && typeof query == 'string'),
queryArguments = [].slice.call(arguments, 1),
module,
returnedValue
;
module = {
initialize: function() {
var
runSettings,
loadingTimer = new Date().getTime(),
loadingDelay,
promise,
url,
formData = {},
data,
ajaxSettings = {},
xhr
;
// serialize parent form if requested!
if(settings.serializeForm && $(this).toJSON() !== undefined) {
formData = module.get.formData();
module.debug('Adding form data to API Request', formData);
$.extend(true, settings.data, formData);
}
// let beforeSend change settings object
runSettings = $.proxy(settings.beforeSend, $module)(settings);
// check for exit conditions
if(runSettings !== undefined && !runSettings) {
module.error(error.beforeSend);
module.reset();
return;
}
// get real url from template
url = module.get.url( module.get.templateURL() );
// exit conditions reached from missing url parameters
if( !url ) {
module.error(error.missingURL);
module.reset();
return;
}
// promise handles notification on api request, so loading min. delay can occur for all notifications
promise =
$.Deferred()
.always(function() {
if(settings.stateContext) {
$context
.removeClass(className.loading)
;
}
$.proxy(settings.complete, $module)();
})
.done(function(response) {
module.debug('API request successful');
// take a stab at finding success state if json
if(settings.dataType == 'json') {
if (response.error !== undefined) {
$.proxy(settings.failure, $context)(response.error, settings, $module);
}
else if ($.isArray(response.errors)) {
$.proxy(settings.failure, $context)(response.errors[0], settings, $module);
}
else {
$.proxy(settings.success, $context)(response, settings, $module);
}
}
// otherwise
else {
$.proxy(settings.success, $context)(response, settings, $module);
}
})
.fail(function(xhr, status, httpMessage) {
var
errorMessage = (settings.error[status] !== undefined)
? settings.error[status]
: httpMessage,
response
;
// let em know unless request aborted
if(xhr !== undefined) {
// readyState 4 = done, anything less is not really sent
if(xhr.readyState !== undefined && xhr.readyState == 4) {
// if http status code returned and json returned error, look for it
if( xhr.status != 200 && httpMessage !== undefined && httpMessage !== '') {
module.error(error.statusMessage + httpMessage);
}
else {
if(status == 'error' && settings.dataType == 'json') {
try {
response = $.parseJSON(xhr.responseText);
if(response && response.error !== undefined) {
errorMessage = response.error;
}
}
catch(error) {
module.error(error.JSONParse);
}
}
}
$context
.removeClass(className.loading)
.addClass(className.error)
;
// show error state only for duration specified in settings
if(settings.errorLength > 0) {
setTimeout(function(){
$context
.removeClass(className.error)
;
}, settings.errorLength);
}
module.debug('API Request error:', errorMessage);
$.proxy(settings.failure, $context)(errorMessage, settings, this);
}
else {
module.debug('Request Aborted (Most likely caused by page change)');
}
}
})
;
// look for params in data
$.extend(true, ajaxSettings, settings, {
success : function(){},
failure : function(){},
complete : function(){},
type : settings.method || settings.type,
data : data,
url : url,
beforeSend : settings.beforeXHR
});
if(settings.stateContext) {
$context
.addClass(className.loading)
;
}
if(settings.progress) {
module.verbose('Adding progress events');
$.extend(true, ajaxSettings, {
xhr: function() {
var
xhr = new window.XMLHttpRequest()
;
xhr.upload.addEventListener('progress', function(event) {
var
percentComplete
;
if (event.lengthComputable) {
percentComplete = Math.round(event.loaded / event.total * 10000) / 100 + '%';
$.proxy(settings.progress, $context)(percentComplete, event);
}
}, false);
xhr.addEventListener('progress', function(event) {
var
percentComplete
;
if (event.lengthComputable) {
percentComplete = Math.round(event.loaded / event.total * 10000) / 100 + '%';
$.proxy(settings.progress, $context)(percentComplete, event);
}
}, false);
return xhr;
}
});
}
module.verbose('Creating AJAX request with settings: ', ajaxSettings);
xhr =
$.ajax(ajaxSettings)
.always(function() {
// calculate if loading time was below minimum threshold
loadingDelay = ( settings.loadingLength - (new Date().getTime() - loadingTimer) );
settings.loadingDelay = loadingDelay < 0
? 0
: loadingDelay
;
})
.done(function(response) {
var
context = this
;
setTimeout(function(){
promise.resolveWith(context, [response]);
}, settings.loadingDelay);
})
.fail(function(xhr, status, httpMessage) {
var
context = this
;
// page triggers abort on navigation, dont show error
if(status != 'abort') {
setTimeout(function(){
promise.rejectWith(context, [xhr, status, httpMessage]);
}, settings.loadingDelay);
}
else {
$context
.removeClass(className.error)
.removeClass(className.loading)
;
}
})
;
if(settings.stateContext) {
$module
.data(metadata.promise, promise)
.data(metadata.xhr, xhr)
;
}
},
get: {
formData: function() {
return $module
.closest('form')
.toJSON()
;
},
templateURL: function() {
var
action = $module.data(settings.metadata.action) || settings.action || false,
url
;
if(action) {
module.debug('Creating url for: ', action);
if(settings.api[action] !== undefined) {
url = settings.api[action];
}
else {
module.error(error.missingAction);
}
}
// override with url if specified
if(settings.url) {
url = settings.url;
module.debug('Getting url', url);
}
return url;
},
url: function(url, urlData) {
var
urlVariables
;
if(url) {
urlVariables = url.match(settings.regExpTemplate);
urlData = urlData || settings.urlData;
if(urlVariables) {
module.debug('Looking for URL variables', urlVariables);
$.each(urlVariables, function(index, templateValue){
var
term = templateValue.substr( 2, templateValue.length - 3),
termValue = ($.isPlainObject(urlData) && urlData[term] !== undefined)
? urlData[term]
: ($module.data(term) !== undefined)
? $module.data(term)
: urlData[term]
;
module.verbose('Looking for variable', term, $module, $module.data(term), urlData[term]);
// remove optional value
if(termValue === false) {
module.debug('Removing variable from URL', urlVariables);
url = url.replace('/' + templateValue, '');
}
// undefined condition
else if(termValue === undefined || !termValue) {
module.error(error.missingParameter + term);
url = false;
return false;
}
else {
url = url.replace(templateValue, termValue);
}
});
}
}
return url;
}
},
// reset api request
reset: function() {
$module
.data(metadata.promise, false)
.data(metadata.xhr, false)
;
$context
.removeClass(className.error)
.removeClass(className.loading)
;
},
setting: function(name, value) {
if( $.isPlainObject(name) ) {
$.extend(true, settings, name);
}
else if(value !== undefined) {
settings[name] = value;
}
else {
return settings[name];
}
},
internal: function(name, value) {
if( $.isPlainObject(name) ) {
$.extend(true, module, name);
}
else if(value !== undefined) {
module[name] = value;
}
else {
return module[name];
}
},
debug: function() {
if(settings.debug) {
if(settings.performance) {
module.performance.log(arguments);
}
else {
module.debug = Function.prototype.bind.call(console.info, console, settings.name + ':');
module.debug.apply(console, arguments);
}
}
},
verbose: function() {
if(settings.verbose && settings.debug) {
if(settings.performance) {
module.performance.log(arguments);
}
else {
module.verbose = Function.prototype.bind.call(console.info, console, settings.name + ':');
module.verbose.apply(console, arguments);
}
}
},
error: function() {
module.error = Function.prototype.bind.call(console.error, console, settings.name + ':');
module.error.apply(console, arguments);
},
performance: {
log: function(message) {
var
currentTime,
executionTime,
previousTime
;
if(settings.performance) {
currentTime = new Date().getTime();
previousTime = time || currentTime;
executionTime = currentTime - previousTime;
time = currentTime;
performance.push({
'Element' : element,
'Name' : message[0],
'Arguments' : [].slice.call(message, 1) || '',
'Execution Time' : executionTime
});
}
clearTimeout(module.performance.timer);
module.performance.timer = setTimeout(module.performance.display, 100);
},
display: function() {
var
title = settings.name + ':',
totalTime = 0
;
time = false;
clearTimeout(module.performance.timer);
$.each(performance, function(index, data) {
totalTime += data['Execution Time'];
});
title += ' ' + totalTime + 'ms';
if(moduleSelector) {
title += ' \'' + moduleSelector + '\'';
}
if( (console.group !== undefined || console.table !== undefined) && performance.length > 0) {
console.groupCollapsed(title);
if(console.table) {
console.table(performance);
}
else {
$.each(performance, function(index, data) {
console.log(data['Name'] + ': ' + data['Execution Time']+'ms');
});
}
console.groupEnd();
}
performance = [];
}
},
invoke: function(query, passedArguments, context) {
var
maxDepth,
found,
response
;
passedArguments = passedArguments || queryArguments;
context = element || context;
if(typeof query == 'string' && instance !== undefined) {
query = query.split(/[\. ]/);
maxDepth = query.length - 1;
$.each(query, function(depth, value) {
var camelCaseValue = (depth != maxDepth)
? value + query[depth + 1].charAt(0).toUpperCase() + query[depth + 1].slice(1)
: query
;
if( $.isPlainObject( instance[value] ) && (depth != maxDepth) ) {
instance = instance[value];
}
else if( $.isPlainObject( instance[camelCaseValue] ) && (depth != maxDepth) ) {
instance = instance[camelCaseValue];
}
else if( instance[value] !== undefined ) {
found = instance[value];
return false;
}
else if( instance[camelCaseValue] !== undefined ) {
found = instance[camelCaseValue];
return false;
}
else {
module.error(error.method, query);
return false;
}
});
}
if ( $.isFunction( found ) ) {
response = found.apply(context, passedArguments);
}
else if(found !== undefined) {
response = found;
}
if($.isArray(returnedValue)) {
returnedValue.push(response);
}
else if(returnedValue !== undefined) {
returnedValue = [returnedValue, response];
}
else if(response !== undefined) {
returnedValue = response;
}
return found;
}
};
if(methodInvoked) {
if(instance === undefined) {
module.initialize();
}
module.invoke(query);
}
else {
if(instance !== undefined) {
module.destroy();
}
module.initialize();
}
return (returnedValue !== undefined)
? returnedValue
: this
;
};
// handle DOM attachment to API functionality
$.fn.apiButton = function(parameters) {
$(this)
.each(function(){
var
// if only function passed it is success callback
$module = $(this),
selector = $(this).selector || '',
settings = ( $.isFunction(parameters) )
? $.extend(true, {}, $.api.settings, $.fn.apiButton.settings, { stateContext: this, success: parameters })
: $.extend(true, {}, $.api.settings, $.fn.apiButton.settings, { stateContext: this}, parameters),
module
;
module = {
initialize: function() {
if(settings.context && selector !== '') {
$(settings.context)
.on(selector, 'click.' + settings.namespace, module.click)
;
}
else {
$module
.on('click.' + settings.namespace, module.click)
;
}
},
click: function() {
if(!settings.filter || $(this).filter(settings.filter).size() === 0) {
$.proxy( $.api, this )(settings);
}
}
};
module.initialize();
})
;
return this;
};
$.api.settings = {
name : 'API',
namespace : 'api',
debug : true,
verbose : true,
performance : true,
api : {},
beforeSend : function(settings) {
return settings;
},
beforeXHR : function(xhr) {},
success : function(response) {},
complete : function(response) {},
failure : function(errorCode) {},
progress : false,
error : {
missingAction : 'API action used but no url was defined',
missingURL : 'URL not specified for the API action',
missingParameter : 'Missing an essential URL parameter: ',
timeout : 'Your request timed out',
error : 'There was an error with your request',
parseError : 'There was an error parsing your request',
JSONParse : 'JSON could not be parsed during error handling',
statusMessage : 'Server gave an error: ',
beforeSend : 'The before send function has aborted the request',
exitConditions : 'API Request Aborted. Exit conditions met'
},
className: {
loading : 'loading',
error : 'error'
},
metadata: {
action : 'action',
promise : 'promise',
xhr : 'xhr'
},
regExpTemplate: /\{\$([A-z]+)\}/g,
action : false,
url : false,
urlData : false,
serializeForm : false,
stateContext : false,
method : 'get',
data : {},
dataType : 'json',
cache : true,
loadingLength : 200,
errorLength : 2000
};
$.fn.apiButton.settings = {
filter : '.disabled, .loading',
context : false,
stateContext : false
};
})( jQuery, window , document );