Add book command to search modding book

COMMANDS.md

@@ -78,4 +78,6 @@ Required arguments are enclosed in { and }, optional arguments are enclosed in [
     <tr> <td>!tell {nick} {message}</td>             <td>Tell somebody a message</td>                         <td>Anyone</td>        </tr>
     <tr> <td><b>modsearch.py</b></td>                <td></td>                                                <td></td>              </tr>
     <tr> <td>!mod {modname}</td>                     <td>Searches for a mod</td>                              <td>Anyone</td>        </tr>
+    <tr> <td><b>booksearch.py</b></td>               <td></td>                                                <td></td>              </tr>
+    <tr> <td>!book {term}</td>                       <td>Searches for a chapter/page in the modding book</td> <td>Anyone</td>        </tr>
 </table>

booksearch.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+"""
+booksearch.py - Phenny Minetest Modding Book Search Module
+Copyright 2018, rubenwardy
+Licensed under GNU General Public License v2.0
+"""
+
+import web
+
+def book(phenny, input):
+	uri = "https://rubenwardy.com/minetest_modding_book/sitemap.json"
+	text, status = web.get(uri)
+	text = str(text, 'utf-8')
+	data = web.json(text)
+
+	query = (input.group(2) or "").lower()
+	if not query: return
+	for ele in data:
+		title = ele["title"]
+		desc  = ele.get("description", "")
+		if query in title.lower() or query in desc.lower():
+			return phenny.reply(title + " - " + ele["loc"])
+
+	phenny.reply("Nothing found.")
+
+book.commands = ['book']
+book.example = '.book folder structure'
+
+if __name__ == '__main__':
+	print(__doc__)