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jam-cloud/web/app/assets/javascripts/utils.js

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JavaScript
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/**
* Common utility functions.
*/
(function(context,$) {
"use strict";
context.JK = context.JK || {};
var logger = context.JK.logger;
context.JK.stringToBool = function(s) {
switch(s.toLowerCase()){
case "true": case "yes": case "1": return true;
case "false": case "no": case "0": case null: return false;
default: return Boolean(s);
}
};
// Build up two maps of images, for each instrument id.
// This map is a simple base map of instrument id to the basic image name.
// Below, a loop goes through this and builds two size-specific maps.
// In the future, we should test Whether having a single larger image
// available, and allowing the browser to resize offers better quality.
var icon_map_base = {
"accordion":"accordion",
"acoustic guitar":"acoustic",
"banjo":"banjo",
"bass guitar":"bass",
"cello":"cello",
"clarinet":"clarinet",
"computer":"computer",
"default":"default",
"drums":"drums",
"electric guitar":"guitar",
"euphonium":"euphonium",
"flute":"flute",
"french horn":"frenchhorn",
"harmonica":"harmonica",
"keyboard":"keyboard",
"mandolin":"mandolin",
"oboe":"oboe",
"other":"other",
"saxophone":"saxophone",
"trombone":"trombone",
"trumpet":"trumpet",
"tuba":"tuba",
"ukulele":"ukelele",
"viola":"viola",
"violin":"violin",
"voice":"vocals"
};
var instrumentIconMap24 = {};
var instrumentIconMap45 = {};
$.each(context._.keys(icon_map_base), function(index, instrumentId) {
var icon = icon_map_base[instrumentId];
instrumentIconMap24[instrumentId] = "../assets/content/icon_instrument_" + icon + "24.png";
instrumentIconMap45[instrumentId] = "../assets/content/icon_instrument_" + icon + "45.png";
});
// Uber-simple templating
// var template = "Hey {name}";
// var vals = { name: "Jon" };
// _fillTemplate(template, vals);
// --> "Hey Jon"
context.JK.fillTemplate = function(template, vals) {
for(var val in vals)
template=template.replace(new RegExp('{'+val+'}','g'), vals[val]);
return template;
};
context.JK.resolveAvatarUrl = function(photo_url) {
return photo_url ? photo_url : "/assets/shared/avatar_generic.png";
};
context.JK.getInstrumentIconMap24 = function() {
return instrumentIconMap24;
};
context.JK.getInstrumentIconMap45 = function() {
return instrumentIconMap45;
};
context.JK.getInstrumentIcon24 = function(instrument) {
if (instrument in instrumentIconMap24) {
return instrumentIconMap24[instrument];
}
return instrumentIconMap24["default"];
};
context.JK.getInstrumentIcon45 = function(instrument) {
if (instrument in instrumentIconMap45) {
return instrumentIconMap45[instrument];
}
return instrumentIconMap45["default"];
};
context.JK.listInstruments = function(app, callback) {
var url = "/api/instruments";
$.ajax({
type: "GET",
dataType: "json",
url: url,
success: function(response) {
callback(response);
},
error: app.ajaxError
});
};
context.JK.showErrorDialog = function(app, msg, title) {
app.layout.showDialog('error-dialog');
$('#error-msg', 'div[layout-id="error-dialog"]').html(msg);
$('#error-summary', 'div[layout-id="error-dialog"]').html(title);
}
// TODO: figure out how to handle this in layout.js for layered popups
context.JK.showOverlay = function() {
$('.dialog-overlay').show();
}
context.JK.hideOverlay = function() {
$('.dialog-overlay').hide();
}
/*
* Loads a listbox or dropdown with the values in input_array, setting the option value
* to the id_field and the option text to text_field. It will preselect the option with
* value equal to selected_id.
*/
context.JK.loadOptions = function(templateHtml, listbox_id, input_array, id_field, text_field, selected_id) {
$.each(input_array, function(index, val) {
var isSelected = "";
if (val[id_field] === selected_id) {
isSelected = "selected";
}
var html = context.JK.fillTemplate(templateHtml, {
value: val[id_field],
label: val[text_field],
selected: isSelected
});
listbox_id.append(html);
});
}
context.JK.trimString = function(str) {
return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
};
context.JK.padString = function(str, max) {
var retVal = '' + str;
while (retVal.length < max) {
retVal = '0' + retVal;
}
return retVal;
}
context.JK.formatDate = function(dateString) {
var date = new Date(dateString);
return date.getFullYear() + "-" + context.JK.padString(date.getMonth()+1, 2) + "-" + context.JK.padString(date.getDate(), 2) + " @ " + date.toLocaleTimeString();
}
context.JK.search = function(query, app, callback) {
$.ajax({
type: "GET",
dataType: "json",
contentType: 'application/json',
url: "/api/search?query=" + query,
processData: false,
success: function(response) {
callback(response);
},
error: app.ajaxError
});
};
context.JK.sendFriendRequest = function(app, userId, callback) {
var url = "/api/users/" + context.JK.currentUserId + "/friend_requests";
$.ajax({
type: "POST",
dataType: "json",
contentType: 'application/json',
url: url,
data: '{"friend_id":"' + userId + '"}',
processData: false,
success: function(response) {
callback(userId);
context.JK.GA.trackFriendConnect(context.JK.GA.FriendConnectTypes.request);
},
error: app.ajaxError
});
};
/*
* Get the length of a dictionary
*/
context.JK.dlen = function(d) {
var count = 0;
for (var i in d) {
if (d.hasOwnProperty(i)) {
count++;
}
}
return count;
};
/**
* Finds the first error associated with the field.
* @param fieldName the name of the field
* @param errors_data response from a 422 response in ajax
* @returns null if no error for the field name, or the 1st error associated with that field
*/
context.JK.get_first_error = function(fieldName, errors_data) {
var errors = errors_data["errors"];
if(errors == null) return null;
if(errors[fieldName] && errors[fieldName].length > 0) {
return errors[fieldName][0]
}
else {
return null;
}
}
/**
* Returns a ul with an li per field name.
* @param fieldName the name of the field
* @param errors_data error data return by a 422 ajax response
* @returns null if no error for the field name; otherwise a ul/li
*/
context.JK.format_errors = function(fieldName, errors_data) {
var errors = errors_data["errors"];
if(errors == null) return null;
var field_errors = errors[fieldName];
if(field_errors == null) {
return null;
}
var ul = $('<ul class="error-text"></ul>')
$.each(field_errors, function(index, item) {
ul.append(context.JK.fillTemplate("<li>{message}</li>", {message: item}))
})
return ul;
}
/**
* Way to verify that a number of parallel tasks have all completed.
* Provide a function to evaluate completion, and a callback to
* invoke when that function evaluates to true.
* NOTE: this does not pause execution, it simply ensures that
* when the test function evaluates to true, the callback will
* be invoked.
*/
context.JK.joinCalls = function(completionTestFunction, callback, interval) {
function doneYet() {
if (completionTestFunction()) {
callback();
} else {
context.setTimeout(doneYet, interval);
}
}
doneYet();
};
/**
* Returns 'MacOSX' if the os appears to be macintosh,
* 'Win32' if the os appears to be windows,
* 'Unix' if the OS appears to be linux,
* and null if unknown
* @returns {*}
*/
context.JK.detectOS = function() {
if(!navigator.platform) { return null; }
if (navigator.platform.toLowerCase().indexOf( 'mac' ) !== -1) {
return "MacOSX";
}
if (navigator.platform.toLowerCase().indexOf( 'win' ) !== -1 ) {
return "Win32"
}
if (navigator.platform.toLowerCase().indexOf('linux') !== -1 ) {
return "Unix"
}
return null;
}
context.JK.popExternalLinks = function() {
// Allow any a link with a rel="external" attribute to launch
// the link in the default browser, using jamClient:
$('a[rel="external"]').click(function(evt) {
evt.preventDefault();
var href = $(this).attr("href");
if (href) {
// make absolute if not already
if(href.indexOf('http') != 0 && href.indexOf('mailto') != 0) {
href = window.location.protocol + '//' + window.location.host + href;
}
context.jamClient.OpenSystemBrowser(href);
}
return false;
});
}
/*
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Copyright (C) Paul Johnston 1999 - 2000.
* Updated by Greg Holt 2000 - 2001.
* See http://pajhome.org.uk/site/legal.html for details.
*/
/*
* Convert a 32-bit number to a hex string with ls-byte first
*/
var hex_chr = "0123456789abcdef";
function rhex(num) {
var str, j;
str = "";
for(j=0; j<=3; j++) {
str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) +
hex_chr.charAt((num >> (j * 8)) & 0x0F);
}
return str;
}
/*
* Convert a string to a sequence of 16-word blocks, stored as an array.
* Append padding bits and the length, as described in the MD5 standard.
*/
function str2blks_MD5(str) {
var nblk, blks, i;
nblk = ((str.length + 8) >> 6) + 1;
blks = new Array(nblk * 16);
for(i = 0; i < nblk * 16; i++) blks[i] = 0;
for(i = 0; i < str.length; i++)
blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);
blks[i >> 2] |= 0x80 << ((i % 4) * 8);
blks[nblk * 16 - 2] = str.length * 8;
return blks;
}
/*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function add(x, y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
/*
* Bitwise rotate a 32-bit number to the left
*/
function rol(num, cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* These functions implement the basic operation for each round of the
* algorithm.
*/
function cmn(q, a, b, x, s, t)
{
return add(rol(add(add(a, q), add(x, t)), s), b);
}
function ff(a, b, c, d, x, s, t)
{
return cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function gg(a, b, c, d, x, s, t)
{
return cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function hh(a, b, c, d, x, s, t)
{
return cmn(b ^ c ^ d, a, b, x, s, t);
}
function ii(a, b, c, d, x, s, t)
{
return cmn(c ^ (b | (~d)), a, b, x, s, t);
}
/*
* Take a string and return the hex representation of its MD5.
*/
context.JK.calcMD5 = function(str) {
var x, a, b, c, d, i,
olda, oldb, oldc, oldd;
x = str2blks_MD5(str);
a = 1732584193;
b = -271733879;
c = -1732584194;
d = 271733878;
for(i = 0; i < x.length; i += 16)
{
olda = a;
oldb = b;
oldc = c;
oldd = d;
a = ff(a, b, c, d, x[i+ 0], 7 , -680876936);
d = ff(d, a, b, c, x[i+ 1], 12, -389564586);
c = ff(c, d, a, b, x[i+ 2], 17, 606105819);
b = ff(b, c, d, a, x[i+ 3], 22, -1044525330);
a = ff(a, b, c, d, x[i+ 4], 7 , -176418897);
d = ff(d, a, b, c, x[i+ 5], 12, 1200080426);
c = ff(c, d, a, b, x[i+ 6], 17, -1473231341);
b = ff(b, c, d, a, x[i+ 7], 22, -45705983);
a = ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
d = ff(d, a, b, c, x[i+ 9], 12, -1958414417);
c = ff(c, d, a, b, x[i+10], 17, -42063);
b = ff(b, c, d, a, x[i+11], 22, -1990404162);
a = ff(a, b, c, d, x[i+12], 7 , 1804603682);
d = ff(d, a, b, c, x[i+13], 12, -40341101);
c = ff(c, d, a, b, x[i+14], 17, -1502002290);
b = ff(b, c, d, a, x[i+15], 22, 1236535329);
a = gg(a, b, c, d, x[i+ 1], 5 , -165796510);
d = gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
c = gg(c, d, a, b, x[i+11], 14, 643717713);
b = gg(b, c, d, a, x[i+ 0], 20, -373897302);
a = gg(a, b, c, d, x[i+ 5], 5 , -701558691);
d = gg(d, a, b, c, x[i+10], 9 , 38016083);
c = gg(c, d, a, b, x[i+15], 14, -660478335);
b = gg(b, c, d, a, x[i+ 4], 20, -405537848);
a = gg(a, b, c, d, x[i+ 9], 5 , 568446438);
d = gg(d, a, b, c, x[i+14], 9 , -1019803690);
c = gg(c, d, a, b, x[i+ 3], 14, -187363961);
b = gg(b, c, d, a, x[i+ 8], 20, 1163531501);
a = gg(a, b, c, d, x[i+13], 5 , -1444681467);
d = gg(d, a, b, c, x[i+ 2], 9 , -51403784);
c = gg(c, d, a, b, x[i+ 7], 14, 1735328473);
b = gg(b, c, d, a, x[i+12], 20, -1926607734);
a = hh(a, b, c, d, x[i+ 5], 4 , -378558);
d = hh(d, a, b, c, x[i+ 8], 11, -2022574463);
c = hh(c, d, a, b, x[i+11], 16, 1839030562);
b = hh(b, c, d, a, x[i+14], 23, -35309556);
a = hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
d = hh(d, a, b, c, x[i+ 4], 11, 1272893353);
c = hh(c, d, a, b, x[i+ 7], 16, -155497632);
b = hh(b, c, d, a, x[i+10], 23, -1094730640);
a = hh(a, b, c, d, x[i+13], 4 , 681279174);
d = hh(d, a, b, c, x[i+ 0], 11, -358537222);
c = hh(c, d, a, b, x[i+ 3], 16, -722521979);
b = hh(b, c, d, a, x[i+ 6], 23, 76029189);
a = hh(a, b, c, d, x[i+ 9], 4 , -640364487);
d = hh(d, a, b, c, x[i+12], 11, -421815835);
c = hh(c, d, a, b, x[i+15], 16, 530742520);
b = hh(b, c, d, a, x[i+ 2], 23, -995338651);
a = ii(a, b, c, d, x[i+ 0], 6 , -198630844);
d = ii(d, a, b, c, x[i+ 7], 10, 1126891415);
c = ii(c, d, a, b, x[i+14], 15, -1416354905);
b = ii(b, c, d, a, x[i+ 5], 21, -57434055);
a = ii(a, b, c, d, x[i+12], 6 , 1700485571);
d = ii(d, a, b, c, x[i+ 3], 10, -1894986606);
c = ii(c, d, a, b, x[i+10], 15, -1051523);
b = ii(b, c, d, a, x[i+ 1], 21, -2054922799);
a = ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
d = ii(d, a, b, c, x[i+15], 10, -30611744);
c = ii(c, d, a, b, x[i+ 6], 15, -1560198380);
b = ii(b, c, d, a, x[i+13], 21, 1309151649);
a = ii(a, b, c, d, x[i+ 4], 6 , -145523070);
d = ii(d, a, b, c, x[i+11], 10, -1120210379);
c = ii(c, d, a, b, x[i+ 2], 15, 718787259);
b = ii(b, c, d, a, x[i+ 9], 21, -343485551);
a = add(a, olda);
b = add(b, oldb);
c = add(c, oldc);
d = add(d, oldd);
}
return rhex(a) + rhex(b) + rhex(c) + rhex(d);
};
})(window,jQuery);
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