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goatee.js
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goatee.js
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/*** Built using revealing module pattern for public/private functions ***/
/*** Feel free to change the namespace, it will not alter the libraries functionality ***/
goatee = (function() {
var fill = function(html, data) {
var currentHTML = html;
// lowercase data keys
var myData = lcaseKeys(data);
var context = {
tags : [],
start : 0,
inner : html,
innerStart : 0,
innerEnd : html.length,
end : html.length
};
var myContext = context;
var previousContext = [];
while(true) {
var matches = currentHTML.match(/\{\{([##!:%\/-]?)(.*?)\}\}/);
if (matches == null) {
break;
}
if (matches[1] != "/") {
myContext.tags.push({ label : matches[2].toLowerCase(), type : matches[1], start : matches.index, end : matches[0].length + matches.index, innerStart : matches[0].length + matches.index, innerEnd : "", tags : [] });
if (matches[1] != "" && matches[1] != "%") {
previousContext.push(myContext);
myContext = myContext.tags[myContext.tags.length - 1];
}
} else {
myContext.end = matches[0].length + matches.index;
myContext.innerEnd = matches.index;
myContext.inner = html.substring(myContext.innerStart, myContext.innerEnd);
myContext = previousContext[previousContext.length - 1];
previousContext.splice(previousContext.length - 1, 1);
}
var temp = [];
for(var i = 0; i < matches[0].length; i++) {
temp.push("-");
}
currentHTML = currentHTML.replace(matches[0], temp.join(""));
}
return processTags(html, context, [ myData ]);
};
var processTags = function(html, context, data) {
var returnArray = [];
var position = context.innerStart;
for(var i = 0; i < context.tags.length; i++) {
returnArray.push(html.substring(position, context.tags[i].start));
position = context.tags[i].end;
if (context.tags[i].type == "-") {
if (data.length > 1) {
var newData = data.slice();
newData.splice(data.length - 1, 1);
returnArray.push(processTags(html, context.tags[i], newData));
}
continue;
}
var myData = data[data.length - 1][context.tags[i].label];
if (context.tags[i].type == "" || context.tags[i].type == "%") {
if (typeof myData == "undefined") {
// do nothing
} else if (typeof myData == "string" || typeof myData == "number") {
/*** standard tags ***/
if (context.tags[i].type == "") {
returnArray.push(myData)
} else {
returnArray.push(myData.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"'));
}
} else if (typeof myData.template != "undefined" && typeof myData.data != "undefined") {
/*** passing a template and data structure ***/
/*** Is array loop over array ***/
if (myData.data instanceof Array) {
for(var j = 0; j < myData.data.length; j++) {
returnArray.push(fill(myData.template, myData.data[j]));
}
} else {
returnArray.push(fill(myData.template, myData.data));
}
}
} else if (context.tags[i].type == "#") {
if (typeof myData != "undefined") {
if (myData instanceof Array) {
for(var j = 0; j < myData.length; j++) {
var newData = data.slice();
newData.push(myData[j]);
returnArray.push(processTags(html, context.tags[i], newData));
}
} else if (myData instanceof Object && !isEmpty(myData)) {
var newData = data.slice();
newData.push(myData);
returnArray.push(processTags(html, context.tags[i], newData));
}
}
} else if (context.tags[i].type == ":") {
if (
typeof myData != "undefined" && (
(typeof myData == "string" && myData != "" && myData != "false")
||
(myData instanceof Array && myData.length > 0)
||
(myData instanceof Object && !isEmpty(myData))
||
(typeof myData == "boolean" && myData != false)
||
(typeof myData == "number")
)
) {
returnArray.push(processTags(html, context.tags[i], data));
}
} else if (context.tags[i].type == "!") {
if (
typeof myData == "undefined"
|| (
(typeof myData == "string" && (myData == "" || myData == "false"))
||
(myData instanceof Array && myData.length == 0)
||
(myData instanceof Object && isEmpty(myData))
||
(typeof myData == "boolean" && myData == false)
)
) {
returnArray.push(processTags(html, context.tags[i], data));
}
}
}
if (position < context.end) {
returnArray.push(html.substring(position, context.innerEnd));
}
return returnArray.join("");
};
/*** Cross browser way to test if an object has no keys ***/
var isEmpty = function(obj) {
for(var prop in obj) {
if(obj.hasOwnProperty(prop)) {
return false;
}
}
return true;
};
// lower cases the keys in our passed in data to make lookups possible
var lcaseKeys = function(data) {
if (data instanceof Array) {
var newData = [];
for(var i = 0; i < data.length; i++) {
newData[i] = lcaseKeys(data[i]);
}
return newData;
} else if (typeof data == "object" && data !== null) {
var newData = {};
for(var i in data) {
newData[i.toLowerCase()] = lcaseKeys(data[i]);
}
return newData;
} else {
return data;
}
};
var unpreserve = function(html) {
return html.replace(/\{\{\$/g, "{{");
};
/*** only reveal public methods ***/
return {
fill : fill,
unpreserve : unpreserve
}
})();