mod_util.py

'''
	Copyright 2014-2015 Teemu Piippo
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. The name of the author may not be used to endorse or promote products
	   derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''

from __future__ import print_function
import math
import json
import subprocess
import re
from modulecore import command_error
import modulecore as ModuleCore
import utility
import calc
import urllib

ModuleData = {
	'commands':
	[
		{
			'name': 'convert',
			'description': 'Performs numeric conversion',
			'args': '<value> as <valuetype>',
			'level': 'normal',
		},
		
		{
			'name': 'ud',
			'description': 'Looks up a term in urban dictionary',
			'args': '<term...>',
			'level': 'normal',
		},

		{
			'name': 'commands',
			'description': 'Lists commands available to the calling user',
			'args': None,
			'level': 'normal',
		},

		{
			'name': 'help',
			'description': 'Prints help about a given command',
			'args': '<command>',
			'level': 'normal',
		},

		{
			'name': 'calc',
			'description': 'Calculates a mathematical expression using apcalc',
			'args': '<expression...>',
			'level': 'normal',
		},

		{
			'name': 'calcfunctions',
			'description': 'Lists the functions supported by .calc',
			'args': None,
			'level': 'normal',
		},

		{
			'name': 'more',
			'description': 'Prints subsequent command result pages',
			'args': None,
			'level': 'normal',
		},

		{
			'name': 'yes',
			'description': 'Confirms the previous command',
			'args': None,
			'level': 'normal',
		},

		{
			'name': 'no',
			'description': 'Unconfirms the previous command',
			'args': None,
			'level': 'normal',
		},

		{
			'name': 'bitly',
			'description': 'Shortens a link using bit.ly',
			'args': '<link>',
			'level': 'normal'
		},

		{
			'name': 'py',
			'description': 'Evaluates python',
			'args': '<command...>',
			'level': 'normal'
		}
	]
}

def cmd_convert (bot, args, reply, **rest):
	try:
		value = float (args['value'])
	except Exception as e:
		command_error (str (e))

	valuetype = args['valuetype']
	
	if valuetype in ['radians', 'degrees']:
		if valuetype == 'radians':
			radvalue = value
			degvalue = (value * 180.) / math.pi
		else:
			radvalue = (value * math.pi) / 180.
			degvalue = value
		
		reply ('%s radians, %s degrees (%s)' % (radvalue, degvalue, degvalue % 360.))
		return
	
	if valuetype in ['celsius', 'fahrenheit']:
		if valuetype == 'celsius':
			celvalue = value
			fahrvalue = value * 1.8 + 32
		else:
			celvalue = (value - 32) / 1.8
			fahrvalue = value
		
		reply ('%s degrees celsius, %s degrees fahrenheit' % (celvalue, fahrvalue))
		return
	
	command_error ('unknown valuetype %s, expected one of: degrees, radians (angle conversion), ' +
		'celsius, fahrenheit (temperature conversion)' % valuetype)

def cmd_ud (bot, args, reply, **rest):
	try:
		url = 'http://api.urbandictionary.com/v0/define?term=%s' % (args['term'].replace (' ', '%20'))
		response = utility.read_url (url)
		data = json.loads (response)
		
		if not 'list' in data \
		or len(data['list']) == 0 \
		or not 'word' in data['list'][0] \
		or not 'definition' in data['list'][0]:
			command_error ("couldn't find a definition of \002%s\002" % args['term'])
		
		word = data['list'][0]['word']
		definition = data['list'][0]['definition'].replace ('\r', ' ').replace ('\n', ' ').replace ('  ', ' ')
		up = data['list'][0]['thumbs_up']
		down = data['list'][0]['thumbs_down']
		reply ("\002%s\002: %s\0033 %d\003 up,\0035 %d\003 down" % (word, definition, up, down))
	except Exception as e:
		command_error ('Urban dictionary lookup failed: %s' % e)

def cmd_commands (bot, reply, ident, host, **rest):
	commandlist = ModuleCore.get_available_commands (ident, host)
	partitioned=[]

	while len (commandlist) > 0:
		partitioned.append (commandlist[0:15])
		commandlist = commandlist[15:]

	for part in partitioned:
		reply ('\002Available commands\002: %s' % (", ".join (part)))

def cmd_help (bot, reply, ident, host, args, **rest):
	cmd = ModuleCore.get_command_by_name (args['command'])

	if not cmd:
		command_error ('unknown command \'%s\'' % args['command'])

	if not ModuleCore.is_available (cmd, ident, host):
		command_error ('you may not use %s' % cmd['name'])

	reply ('%s %s: %s' % (cmd['name'], cmd['args'], cmd['description']))

def mathsubstitute (expr, token, value):
	rex = re.compile (r'^(.*)\b' + token + r'\b(.*)$')
	match = rex.match (expr)

	while match:
		expr = match.group(1) + str (value) + match.group(2)
		match = rex.match (expr)

	return expr

def cmd_calcfunctions (bot, reply, **rest):
	reply ('Available functions for .calc: %s' % \
		', '.join (sorted ([name for name, data in calc.Functions.items()])))

def cmd_calc (bot, reply, args, **rest):
	reply (calc.Calculator().calc (args['expression']))
	# expr = args['expression']
	# try:
		# Substitute some mathematical constants
		# expr = mathsubstitute (expr, 'pi' , 3.14159265358979323846264338327950288419716939937510)
		# expr = mathsubstitute (expr, 'e'  , 2.71828182845904523536028747135266249775724709369995)
		# expr = mathsubstitute (expr, 'phi', 1.6180339887498948482) # golden ratio

		# result = subprocess.check_output (['calc', '--', expr], stderr=subprocess.STDOUT) \
			# .replace ('\t', '') \
			# .replace ('\n', '')

		# errmatch = re.compile (r'^.*\bError\b.*$').match (result)

		# if errmatch:
			# command_error ('math error')
			# return

		# reply ('Result: %s' % result)
	# except subprocess.CalledProcessError as e:
		# command_error (e.output.split('\n')[0])
	# except OSError as e:
		# command_error ('failed to execute calc: ' + e.strerror)

def cmd_more (commandObject, **rest):
	ModuleCore.print_responses (commandObject)

def cmd_yes (**k):
	ModuleCore.confirm (k, True)

def cmd_no (**k):
	ModuleCore.confirm (k, False)

def cmd_bitly (reply, args, **k):
	reply ('Result: %s' % utility.shorten_link (args['link']))

def cmd_py (reply, args, **rest):
	url = 'http://eval.appspot.com/eval?statement=' + urllib.quote (args['command'])
	result = utility.read_url (url).splitlines()

	# \x0f is the 'reset colors' code, prepended to all reply lines to prevent other bots from
	# reacting to this .py call.

	if result[0] == 'Traceback (most recent call last):':
		reply ('\x0f' + result[-1])
	else:
		for line in result:
			reply ('\x0f' + line)