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template.js
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template.js
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const fs = require('fs');
const path = require('path');
const util = require('./util');
const CARET_START = /\$caret_start\$/i;
module.exports = (function(){
var app;
var tpls;
function cls(_app, _tpls)
{
app = _app;
tpls = _tpls;
/**
* Adds or replaces an existing template.
* @param filePath The caller must check whether the path exists.
* @return boolean whether ok.
*/
this.add = function(filePath){
var fileExt = util.getFileExt(filePath);
var lang = util.getLang(fileExt.toLowerCase());
if (lang < 0)
return false;
// check whether exists until we have to open the file
tpls[lang+''] = filePath;
return true;
};
/**
* @param lang LANG_* constant
*/
this.remove = function(lang){
tpls[lang+''] = null;
};
this.getAll = function(){
return tpls;
};
this.spawn = function(lang, destFilePath){
var contents = '';
var srcFilePath = tpls[lang+''];
if (srcFilePath)
{
contents = fs.readFileSync(srcFilePath, {encoding: 'utf8'});
}
var opts = {
// use default mode (inherit from parent usually)
encoding: 'utf8',
flag: 'w' // create if not exist, truncate otherwise
};
var lineNum = 1;
var r = {lineNum: -1, colNum: 1};
var writer = fs.createWriteStream(destFilePath, opts);
var m;
var lastIndex = -1;
// localize this regex since it remembers previous matches
const LINE_MATCH = /(.*?)(\r\n?|\n|$)/g;
// Do this to preserve line ending
while(true)
{
m = LINE_MATCH.exec(contents);
if (!m || LINE_MATCH.lastIndex == lastIndex) break;
var line = m[1];
var m2;
if (r.lineNum < 0 && (m2 = CARET_START.exec(line)))
{
r.lineNum = lineNum;
r.colNum = m2.index+1;
writer.write(line.substring(0, m2.index), 'utf8');
}
else
{
writer.write(line, 'utf8');
}
// write the line ending
writer.write(m[2], 'ascii');
lineNum++;
lastIndex = LINE_MATCH.lastIndex;
}
writer.end();
return r;
};
}
return cls;
})();