From 6ae70537c08a149dacd4cee6244b4f481c6bd727 Mon Sep 17 00:00:00 2001
From: Ryan Hitchman <hitchmanr@gmail.com>
Date: Tue, 7 Jan 2014 13:41:07 -0800
Subject: [PATCH] .near: show closest users to you

---
 plugins/tag.py     | 37 ++++++++++++++++++++++++++++++++++++-
 plugins/weather.py | 36 +++++++++++++++++++++++++++---------
 2 files changed, 63 insertions(+), 10 deletions(-)

diff --git a/plugins/tag.py b/plugins/tag.py
index b249434..0653feb 100644
--- a/plugins/tag.py
+++ b/plugins/tag.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import math
 import random
 import re
 import threading
@@ -128,7 +129,7 @@ def get_nicks_by_tagset(db, chan, tagset):
 
     nicks = [munge(x[0], 1) for x in sorted(nicks)]
     if not nicks:
-        return 'no tags found in intersection of "%s"' % tagset
+        return 'no nicks found with tags "%s"' % tagset
     return 'nicks tagged "%s": ' % tagset + winnow(nicks)
 
 
@@ -173,6 +174,40 @@ def tagged(inp, chan='', db=None):
 
     return get_nicks_by_tagset(db, chan, inp)
 
+def distance(lat1, lon1, lat2, lon2):
+    deg_to_rad = math.pi / 180
+    lat1 *= deg_to_rad
+    lat2 *= deg_to_rad
+    lon1 *= deg_to_rad
+    lon2 *= deg_to_rad
+
+    R = 6371 # km
+    d = math.acos(math.sin(lat1)*math.sin(lat2) +
+                  math.cos(lat1)*math.cos(lat2) *
+                  math.cos(lon2-lon1)) * R
+    return d
+
+
+@hook.command(autohelp=False)
+def near(inp, nick='', chan='', db=None):
+    init_db(db)
+
+    try:
+        loc = db.execute("select lat, lon from location where chan=? and lower(nick)=lower(?)", (chan, nick)).fetchone()
+    except db.OperationError:
+        loc = None
+
+    if loc is None:
+        return 'use .weather <loc> first to set your location'
+
+    lat, lon = loc
+
+    db.create_function('distance', 4, distance)
+    nearby = db.execute("select nick, distance(lat, lon, ?, ?) as dist from location where chan=?"
+                         " limit 20", (lat, lon, chan)).fetchall()
+
+    return nearby
+
 
 character_replacements = {
     'a': 'ä',
diff --git a/plugins/weather.py b/plugins/weather.py
index 74169dd..cefeda8 100644
--- a/plugins/weather.py
+++ b/plugins/weather.py
@@ -1,30 +1,43 @@
 "weather, thanks to wunderground"
 
+import math
+
 from util import hook, http
 
 
+
 @hook.api_key('wunderground')
 @hook.command(autohelp=False)
-def weather(inp, nick='', server='', reply=None, db=None, api_key=None):
+def weather(inp, chan='', nick='', reply=None, db=None, api_key=None):
     ".weather <location> [dontsave] -- gets weather data from Wunderground "\
             "http://wunderground.com/weather/api"
 
     if not api_key:
         return None
 
+    # this database is used by other plugins interested in user's locations,
+    # like .near in tag.py
+    db.execute("create table if not exists location(chan, nick, loc, lat, lon, primary key(chan, lower(nick)))")
+
     loc = inp
 
     dontsave = loc.endswith(" dontsave")
     if dontsave:
         loc = loc[:-9].strip().lower()
 
-    db.execute("create table if not exists weather(nick primary key, loc)")
 
     if not loc:  # blank line
-        loc = db.execute("select loc from weather where nick=lower(?)",
-                            (nick,)).fetchone()
+        loc = db.execute("select loc from location where chan=? and lower(nick)=lower(?)",
+                            (chan, nick)).fetchone()
         if not loc:
-            return weather.__doc__
+            try:
+                # grab from old-style weather database
+                loc = db.execute("select loc from weather where nick=lower(?)",
+                                 (nick,)).fetchone()
+            except db.OperationalError:
+                pass    # no such table
+            if not loc:
+                return weather.__doc__
         loc = loc[0]
 
     loc, _, state = loc.partition(', ')
@@ -91,13 +104,18 @@ def weather(inp, nick='', server='', reply=None, db=None, api_key=None):
     info['l_f'] = sf['low']['fahrenheit']
     info['l_c'] = sf['low']['celsius']
     info['humid'] = obs['relative_humidity']
-    info['wind'] = 'Wind: {mph}mph/{kph}kph'\
+    info['wind'] = 'Wind: {mph}mph/{kph}kph' \
             .format(mph=obs['wind_mph'], kph=obs['wind_kph'])
-    reply('{city}: {weather}, {t_f}F/{t_c}C'\
+    reply('{city}: {weather}, {t_f}F/{t_c}C' \
             '(H:{h_f}F/{h_c}C L:{l_f}F/{l_c}C)' \
             ', Humidity: {humid}, {wind}'.format(**info))
 
+    lat = float(obs['display_location']['latitude'])
+    lon = float(obs['display_location']['longitude'])
+
     if inp and not dontsave:
-        db.execute("insert or replace into weather(nick, loc) values (?,?)",
-                     (nick.lower(), inp))
+        db.execute("insert or replace into location(chan, nick, loc, lat, lon) "
+                   "values (?, ?, ?, ?,?)",        (chan, nick, inp, lat, lon))
         db.commit()
+
+