13512019 Christ Angga Saputra

.gitignore

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+node_modules/
+npm-debug.log

README.md

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 # README for Service Adapter Assignment on IF4050 2015
 
-##Instruction
-1. Fork this repository https://github.com/if-itb/if4050-2015-ServiceAdapter.git
-2. Work on your fork --> commit --> push [as many as you want]
-3. [When you are done OR the deadline] create pull request  
+ * NIM      = 13512019
+ * Name     = Christ Angga Saputra
+ * GithubID = christangga
 
-Each participnats should indicate clearly the following data:
- * NIM      = 1[35|82]+XXYYY
- * Name     = XXXXXXX
- * GithubID = YYYY
-
-Requreiments:
- * ....
- * ....
- * 
+Requirements:
+ * NodeJS
 
 How to Deploy
- 1. .....
- 2. .....
- 3. .....
- 4. 
-
+ 1. Install all dependencies with `npm update`
+ 2. Run the server with `npm start`.
+ 2. Your web service is ready at `http://localhost:8000`
+
 How to Run
- 1. .....
- 2. .....
-
+ 1. Available endpoint is:
+   - `[GET] /?ps=XXX&kode=YYYYYY&kelas=ZZ`
+   - `ps` is major code
+   - `kode` is course code
+   - `kelas` is class number code
+   - Return value will be in `json`

index.js

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+var express = require('express');
+var fs      = require('fs');
+var request = require('request');
+var cheerio = require('cheerio');
+var async   = require('async');
+var app     = express();
+
+app.use(function(req, res, next) {
+	if (!req.query.ps || !req.query.kode || !req.query.kelas) {
+		res.type('application/json');
+		res.status(400).json({'error': 'Request tidak sesuai format'});
+	} else {
+		next();
+	}
+});
+
+app.get('/', function(req, res) {
+	var base_url = 'https://six.akademik.itb.ac.id/publik/';
+
+	var ps = req.query.ps;
+	var code = req.query.kode.toUpperCase();
+	var class_no = req.query.kelas;
+
+	async.waterfall([
+		function(callback) {
+			var classlist_url = 'daftarkelas.php?ps=' + ps + '&semester=1&tahun=2015&th_kur=2013';
+
+			request(base_url + classlist_url, function(error, response, html) {
+				var dpk_url = '';
+				var err = null;
+
+				if (!error) {
+					var $ = cheerio.load(html);
+
+					$('ol li').filter(function(i, el) {
+						var text = $(this).text();
+						return (text.substring(0, text.indexOf(' ')) == code);
+					}).children('ul').children('li').each(function(i, el) {
+						var text = $(this).children('a').first().html();
+						if (text == class_no) {
+							dpk_url = $(this).children('a').first().attr('href');
+						}
+					});
+
+					if (!dpk_url) {
+						err = 404;
+					}
+				} else {
+					err = 500;
+				}
+
+				callback(err, base_url + dpk_url);
+			});
+		},
+		function(dpk_url, callback) {
+			request(dpk_url, function(error, response, html) {
+				var json = {};
+				var err = null;
+
+				if (!error) {
+					var $ = cheerio.load(html);
+
+					var data              	= $('pre').text().replace('"','').split('\n');
+					json['fakultas']      	= data[0];
+					json['prodi']			= data[1].substring(data[1].indexOf(':')+2);
+					json['semester']      	= data[2].substring(data[2].indexOf(':')+2,data[2].indexOf('/'));
+					json['tahun']         	= parseInt('20' + data[2].substring(data[2].indexOf('/')+1));
+					json['kode']          	= data[4].substring(data[4].indexOf(':')+2,data[4].lastIndexOf('/')-1);
+					json['mata_kuliah']   	= data[4].substring(data[4].lastIndexOf('/')+2,data[4].indexOf(','));
+					json['sks']           	= data[4].substr(data[4].indexOf(',')+2,1);
+					json['kelas']         	= data[5].substring(data[5].indexOf(':')+2,data[5].lastIndexOf('/')-1);
+					json['dosen']         	= data[5].substring(data[5].lastIndexOf('/')+2);
+					json['jumlah_peserta']	= data[data.length-2].substring(data[data.length-2].indexOf('=')+2);
+					json['peserta']     	= [];
+
+					for (var i=10; i<data.length-3; i++) {
+						data[i] = data[i].trim();
+
+						var peserta     = {};
+						peserta['nim']  = data[i].substring(data[i].indexOf(' ')+1,data[i].indexOf('   '));
+						peserta['nama'] = data[i].substring(data[i].indexOf('   ')+3);
+
+						json['peserta'].push(peserta);
+					}
+				} else {
+					err = 500;
+				}
+
+				callback(err, json);
+			});
+		}
+	], function (err, result) {
+		res.type('application/json');
+		if (!err) {
+			res.status(200).json(result);
+		} else if (err == 404) {
+			res.status(404).json({'error': 'Tidak ditemukan kelas dengan kode ' + code});
+		} else if (err = 500) {
+			res.status(500).json({'error': 'Terjadi kesalahan pada server'});
+		} else {
+			res.status(500).json({'error': 'Terjadi kesalahan pada server'});
+		}
+	});
+});
+
+app.listen('8000');
+console.log('Magic happens on port 8000');
+
+exports = module.exports = app;

package.json

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+{
+  "name"         : "six-scrapper",
+  "version"      : "0.0.1",
+  "description"  : "SIX Scrapper",
+  "main"         : "index.js",
+  "scripts"      : {
+    "start"      : "node index.js"
+  },
+  "keywords"     : [
+    "six",
+    "scrap"
+  ],
+  "author"       : "Christ Angga Saputra",
+  "license"      : "",
+  "dependencies" : {
+    "express"    : "latest",
+    "request"    : "latest",
+    "cheerio"    : "latest",
+    "async"      : "latest"
+  }
+}