lib.js

/*
 Copyright 2017 Google Inc.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

var lodash 			= require('lodash');
var path 			= require('path');
var fs				= require('fs-extra');
var mustache 		= require('mustache');
var prompt_lib		= require('prompt');
var gutil 			= require('gulp-util');
var zipdir          = require('zip-dir');
var spawn 			= require('cross-spawn');

function replace_variables(paths, inject_object) {
    mustache.escape = function (value) {
        return value;
    };

	for(var i=0; i<paths.length; i++){
		var path_to_template = paths[i];

		var data

		try {
			data = fs.readFileSync(path_to_template, 'utf8');
		} catch(e){
			console.log(e);
		}

		var mu_template = String(data);

		try {
			var output = mustache.render(mu_template, inject_object);
		} catch(e) {
			console.log(e);
		}

		try {
			fs.outputFileSync(path_to_template, output);
		} catch (e){
			console.log(e);
		}

		output = '< yet to copy from original template >'
	}
}

function npm_install_local_only(npm_dir, callback) {
	var npm_process 			= spawn('npm', ['install'],{'cwd': npm_dir});

	if(npm_process.stdout){
        npm_process.stdout.setEncoding('utf8');

        npm_process.stdout.on('data', function (data) {
            console.log(data);
        });
	}

    if(npm_process.stderr){
        npm_process.stderr.setEncoding('utf8');

        npm_process.stderr.on('data', function (data) {
            console.log(data);
        });
    }

	npm_process.on('exit', function(code){
		callback(code);
	});
}

function prompt(inputs, cb) {
	var required_values = [];

	for(var i=0; i<inputs.length; i++){
		required_values.push({name: inputs[i].name, description: inputs[i].prompt, type: 'string', required: true});
	}

	prompt_lib.start();

	prompt_lib.get(required_values, function(err, results) {
		cb(err, result);
	});

}

function print(level, msg){
	if(level.toUpperCase() == 'ERROR')
		gutil.log(gutil.colors.red(msg));
	else if(level.toUpperCase() == 'INFO')
		gutil.log(gutil.colors.green(msg));
	else if(level.toUpperCase() == 'META')
        gutil.log(gutil.colors.magenta(msg));
    else if(level.toUpperCase() == 'WARNING')
        gutil.log(gutil.colors.yellow(msg));
	else
		console.log(msg);
}

function normalize_data(obj) {
	if(obj.scopes){
		var list = obj.scopes;
		var str = '';
        ;
		for (var i=0; i< list.length-1; i++) {
			if(list[i] && list[i].trim()!= '') {
				str += list[i].trim() + ",";
			}
		}
        ;
		str += list[list.length-1];
		obj.scopes = str;
	}
	if(obj.environments){
		var list = obj.environments
		var str = ''
		for (var i=0; i< list.length-1; i++) {
			if(list[i] && list[i].trim()!= '') {
				str += list[i].trim() + ",";
			}
		}
		str += list[list.length-1];
		obj.environments = str;
	}

	if(obj.proxies){
		var list = obj.proxies;
		var str = '';
		for (var i=0; i< list.length-1; i++) {
			if(list[i] && list[i].trim()!= '') {
				str += list[i].trim() + ",";
			}
		}
		str += list[list.length-1];
		obj.proxies = str;
	}

	return obj
}

function zip(dir, options, cb) {
    zipdir(dir, options, function (err, buffer) {
        cb(err, buffer);
    });
}

function filter_items(items, params) {
	var output = [];

	if(params.items) {
        for (var i = 0; i < items.length; i++) {
            var item = items[i];

			if (params.items.indexOf(item.name) != -1)
                output.push(items[i]);
        }
    } else {
        output = items;
	}

	return output;
}

function extract_response(context, collect_info, result) {
    for (var i=0; i<collect_info.length; i++){
        var pattern;
		var value;

		if(collect_info[i]['from'] && collect_info[i]['from'] != '') {
            pattern = collect_info[i]['from'].split('.')

            if(typeof result == 'string') {
                value = JSON.parse(result);
            } else {
                value = result;
            }

        } else {
            value = result;
		}

		if(pattern != undefined) {
            for (var j = 0; j < pattern.length; j++) {
                value = value[pattern[j]];
            }
        }

        context.setVariable(collect_info[i]['to'], value);
    }
}

function is_json_string(str) {
    try {
        JSON.parse(str);
    } catch (e) {
        return false;
    }

    return true;
}

exports.replace_variables 		= replace_variables;
exports.npm_install_local_only	= npm_install_local_only;
exports.prompt 					= prompt;
exports.print 					= print;
exports.normalize_data 			= normalize_data;
exports.zip                     = zip;
exports.filter_items 			= filter_items;
exports.extract_response 		= extract_response;
exports.is_json_string 			= is_json_string;