basecamp-guide/lib/FileContentModifier.js

Task automator for the Basecamp Framework.

// Dependecies
var p = require('path');
var fs = require('fs');
var Colors = require('colors');
var Exec = require('child_process').execSync;
var FileSys = require('./FileSystem.js');

/**
 * 
 * Modifes content of files.
 * 
 */

var FileContentModifier = {
    addContent : function(newContent, afterText, originalContent) {
        
        if (this.contentExist(newContent, originalContent)) {
            return undefined;
        };

        var rexpression = new RegExp(this.escapeRegExp(afterText));
        var position = originalContent.search(rexpression);
        var updatedContent = this.writeContentAtPosition(position + afterText.length, newContent, originalContent);
        
        return updatedContent;
    },
    replaceContent : function(oldContent, newContent, originalContent) {
        var rexpression = new RegExp(this.escapeRegExp(oldContent));
        return originalContent.replace(rexpression, newContent);
    },
    writeContentAtPosition : function(position, content, fileContent) {
        var part1 = fileContent.slice(0, position);
        var part2 = fileContent.slice(position);
        
        return part1 + content + part2;
    },
    searchNextPositionOf : function(searchChar, content, startPosition) {
        var position = -1;
        for (var i = startPosition; i <= content.length -1; i++) {
            if (content[i] == searchChar) {
                position = i;
                break;
            } 
        };

        return position;
    },
    escapeRegExp : function(expression) {
        return expression.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
    },
    contentExist : function(newContent, originalContent) {
        var rexpression = new RegExp(this.escapeRegExp(newContent));
        var position = originalContent.search(rexpression);

        if (position >= 0) return true;
        return false;
    },
    /*
     * config-property will be injected from the 
     * CommandLineTool while adding the command
     */
    config : {},
    
}

module.exports = FileContentModifier;