/
helper.js
351 lines (309 loc) · 10.9 KB
/
helper.js
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(function() {
var ref = YAHOO.namespace('lcl.helper');
ref.guidLong2Short = function(st) {
var bin = ref.hex2Bin(st.replace(/-/g, ''));
return ref.urlsafe_base64Encode(bin).replace(/=/g, '');
};
ref.guidShort2Long = function(st) {
var hex = ref.bin2Hex(ref.urlsafe_base64Decode(st + "=="));
return [hex.substring(0,8), hex.substring(8,12), hex.substring(12,16), hex.substring(16,20), hex.substring(20)].join('-');
};
/**
* taken from http://www.webtoolkit.info/javascript-base64.html
*/
ref.base64Encode = function(str) {
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var data = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
do {
chr1 = str.charCodeAt(i++);
chr2 = str.charCodeAt(i++);
chr3 = str.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
data = data + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) + keyStr.charAt(enc4);
} while (i < str.length);
return data;
};
ref.urlsafe_base64Encode = function(input) {
return ref.base64Encode(input).replace(/\+/g, '-').replace(/\//g, '_');
};
/**
* taken from http://www.webtoolkit.info/javascript-base64.html
*/
ref.base64Decode = function(input) {
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
do {
enc1 = keyStr.indexOf(input.charAt(i++));
enc2 = keyStr.indexOf(input.charAt(i++));
enc3 = keyStr.indexOf(input.charAt(i++));
enc4 = keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
} while (i < input.length);
return output;
};
ref.urlsafe_base64Decode = function(input) {
return ref.base64Decode(input.replace(/-/g, '+').replace(/_/g, '/'));
};
ref.hex2Bin = function(string) {
var bin = '';
for (var i=0; i<string.length; i+=2) {
var hex = string.substring(i, i+2);
bin += String.fromCharCode(parseInt(hex, 16));
}
return bin;
};
ref.bin2Hex = function(bin) {
var hex = '';
for (var i=0; i<bin.length; i++) {
var chunk = bin.charCodeAt(i).toString(16);
if (chunk.length == 1) {
chunk = '0' + chunk;
}
hex += chunk;
}
return hex.toUpperCase();
};
/**
* taken from http://snippets.dzone.com/posts/show/5925
*/
ref.formatDate = function (formatDate, formatString) {
if(formatDate instanceof Date) {
var months = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
var yyyy = formatDate.getFullYear();
var yy = yyyy.toString().substring(2);
var m = formatDate.getMonth();
var mm = m < 10 ? "0" + m : m;
var mmm = months[m];
var d = formatDate.getDate();
var dd = d < 10 ? "0" + d : d;
var h = formatDate.getHours();
var hh = h < 10 ? "0" + h : h;
var n = formatDate.getMinutes();
var nn = n < 10 ? "0" + n : n;
var s = formatDate.getSeconds();
var ss = s < 10 ? "0" + s : s;
formatString = formatString.replace(/yyyy/i, yyyy);
formatString = formatString.replace(/yy/i, yy);
formatString = formatString.replace(/mmm/i, mmm);
formatString = formatString.replace(/mm/i, mm);
formatString = formatString.replace(/m/i, m);
formatString = formatString.replace(/dd/i, dd);
formatString = formatString.replace(/d/i, d);
formatString = formatString.replace(/hh/i, hh);
formatString = formatString.replace(/h/i, h);
formatString = formatString.replace(/nn/i, nn);
formatString = formatString.replace(/n/i, n);
formatString = formatString.replace(/ss/i, ss);
formatString = formatString.replace(/s/i, s);
return formatString;
} else {
return "";
}
};
ref.getFirstProperty = function(obj){
for(var key in obj){
return key;
}
};
/**
* var o = objectConverter(['one', 'two', 'three'])
* -> o = {one: '', two: '', three: ''}
* used for checking if a value is in an array
* taken from http://snook.ca/archives/javascript/testing_for_a_v/
*/
ref.objectConverter = function(a) {
var o = {};
for(var i=0;i<a.length;i++) {
o[a[i]]='';
}
return o;
};
/**
* {a:1, b:2} → "a=1&b=2"
*/
ref.object2str = function(object) {
var list = [];
for (var key in object) {
list.push(key + '=' + object[key]);
}
return list.join('&');
};
/**
* taken from http://keithdevens.com/weblog/archive/2007/Jun/07/javascript.clone
*/
ref.clone = function(obj) {
if(obj == null || typeof(obj) != 'object') {
return obj;
}
var temp = new obj.constructor(); // changed (twice)
for(var key in obj) {
temp[key] = ref.clone(obj[key]);
}
return temp;
};
/**
* e.g: substitute_reverse('hans hat dampf', 'hans {verb} {nomen}')
* returns {verb:'hat', nomen:'dampf'}
*
* if template doesn't match str, false is returned
*/
ref.substitute_reverse = function(str, template) {
var search = template.replace(/\{[^\}]+\}/g, '([^/]+)');
var regExp = new RegExp(search, "g");
if (str.search(regExp) == 0) {
var values = regExp.exec(str).slice(1);
var keys = template.match(/{([^}]+)}/g, template);
var dict = {};
for (var i=0; i<values.length; i++) {
var key = keys[i].substring(1, keys[i].length - 1);
dict[key] = values[i];
}
return dict;
} else {
return false;
}
};
ref.removeAllChildNodes = function(node) {
while (node.hasChildNodes()){
node.removeChild(node.firstChild);
}
};
/**
* taken from http://www.webtoolkit.info/javascript-url-decode-encode.html
* needed for non-ascii-chars in urlencode (escape doesn't handle these correctly)
*/
ref.utf8_encode = function (string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
};
ref.urlencode = function(string) {
return escape(ref.utf8_encode(string));
};
/**
* sameProperties({a:1}, {a:2}) -> true
*/
ref.hasSameProperties = function(object1, object2) {
var objects_merged = YAHOO.lang.merge(object1, object2);
return ((ref.countProperties(object1) == ref.countProperties(object2)) && (ref.countProperties(object1) == ref.countProperties(objects_merged)));
};
/**
* countProperties({a:1, b:2}) -> 2
*/
ref.countProperties = function(object) {
var count = 0;
for (k in object) {
if (object.hasOwnProperty(k)) {
count++;
}
}
return count;
};
/**
* generates a somehow smart String-Difference:
*
* stringDiff("Query: Guide", "Cockpit: Guide")
* returns ["Query", "Cockpit"]
*
* stringDiff("Query: Guide", "Query Phonebook")
* returns ["Guide", "Phonebook"]
*/
ref.stringDiff = function(str1, str2) {
if (str1 == str2) {
return undefined;
}
var prefixLength = ref.samePrefixLength(str1, str2);
if (prefixLength > 3) {
return [str1.substring(prefixLength).trim(" .:"), str2.substring(prefixLength).trim(" .:")];
}
var postfixLength = ref.samePostfixLength(str1, str2);
if (postfixLength > 3) {
return [str1.slice(0, postfixLength * -1).trim(" .:"), str2.slice(0, postfixLength * -1).trim(" .:")];
}
};
/**
* e.g. samePrefixLength("Query: Guide", "Query: Phonebook")
* returns 7 (which is == "Query: ".length)
* function ignores case
*/
ref.samePrefixLength = function(str1, str2) {
var i = 0;
var str1lower = str1.toLowerCase();
var str2lower = str2.toLowerCase();
while (str1.charAt(i) == str2.charAt(i)) {
i++;
}
return i;
};
/**
* e.g. samePrefixLength("Query: Guide", "Cockpit: Guide")
* returns 7 (which is == ": Guide".length)
* function ignores case
*/
ref.samePostfixLength = function(str1, str2) {
return ref.samePrefixLength(str1.reverse(), str2.reverse());
};
})();
/**
* taken from http://www.tek-tips.com/faqs.cfm?fid=6620
*/
String.prototype.startsWith = function(str) {
return (this.match("^"+str)==str);
};
String.prototype.endsWith = function(str) {
return (this.match(str+"$")==str);
};
/*
* " string ".trim(" ") -> "string"
* ".:string:."trim(".:") -> "string"
*/
String.prototype.trim = function(trimChars){
var regExpStart = new RegExp("^["+trimChars+"]+", "g");
var regExpEnd = new RegExp("["+trimChars+"]+$", "g");
return (this.replace(regExpStart, "").replace(regExpEnd, ""));
};
String.prototype.reverse = function(){
var splitext = this.split("");
var revertext = splitext.reverse();
var reversed = revertext.join("");
return reversed;
};