added myfitnesspal plugin

Author: edillingham

plugins/myfitnesspal.py

@@ -0,0 +1,91 @@
+import locale
+import math
+import requests
+from bs4 import BeautifulSoup
+
+from cloudbot import hook
+
+scrape_url = "http://www.myfitnesspal.com/food/diary/{}"
+
+
+@hook.command('mfp')
+@hook.command('myfitnesspal')
+def mfp(text, bot):
+    """<user> - returns macros from the MyFitnessPal food diary of <user>"""
+    request = requests.get(scrape_url.format(text))
+
+    if request.status_code != requests.codes.ok:
+        return "Failed to fetch info ({})".format(request.status_code)
+
+    output = "Diary for {}: ".format(text)
+
+    try:
+        soup = BeautifulSoup(request.text, 'html.parser')
+
+        title = soup.find('h1', {'class': 'main-title'})
+        if title:
+            if title.text == 'This Food Diary is Private':
+                return "{}'s food diary is private.".format(text)
+            if title.text == 'This Username is Invalid':
+                return "User {} does not exist.".format(text)
+
+        # the output of table depends on the user's MFP profile configuration
+        headers = get_headers(soup)
+        totals = get_values(soup, 'total')
+        remaining = get_values(soup, 'alt')
+
+        for idx, val in enumerate(headers['captions']):
+            kwargs = {
+                'caption':  val,
+                'total':    totals[idx],
+                'remain':   remaining[idx],
+                'units':    headers['units'][idx],
+                'pct':      math.floor((totals[idx]/remaining[idx])*100)
+                }
+
+            output += ("{caption}: {total}/{remain}{units} ({pct}%) "
+                       .format(**kwargs))
+
+        output += " ({})".format(scrape_url.format(text))
+
+    except Exception as e:
+        print(e)
+        output = "Error parsing results."
+
+    return output
+
+
+def get_headers(soup):
+    """get nutrient headers from the soup"""
+    headers = {'captions': [], 'units': []}
+
+    footer = soup.find('tfoot')
+    for cell in footer.findAll('td', {'class': 'nutrient-column'}):
+        div = cell.find('div')
+        headers['units'].append(div.text)
+        headers['captions'].append(div.previous_sibling.strip())
+
+    return headers
+
+
+def get_values(soup, row_class):
+    """get values from a specific summary row based on the row class"""
+    locale.setlocale(locale.LC_ALL, 'english_USA')  # for number parsing
+
+    values = []
+
+    cells = soup.find('tr', {'class': row_class}).find_all('td')
+
+    for elem in cells[1:]:
+        # if there's a child span with class "macro-value", use its value
+        # otherwise use the cell text
+        span = elem.find('span', {'class': 'macro-value'})
+        if span:
+            value = span.text
+        else:
+            value = elem.text
+
+        if value.strip() != '':
+            values.append(locale.atoi(value))
+
+    return values