VandyMobile Dining Scraper

gistfile1.txt

- (void)downloadAndParseMenuForDate:(NSDate *)date {
    [self parseHppleMenu:
     [self downloadMenuForDateComponents:
      [self componentsFromCurrentDate:date]]];
}

- (NSDateComponents *)componentsFromCurrentDate:(NSDate *)today {
    NSCalendar *gregorian = [[NSCalendar alloc]
                             initWithCalendarIdentifier:NSGregorianCalendar];
    return [gregorian components:(NSDayCalendarUnit
                           | NSMonthCalendarUnit
                           | NSYearCalendarUnit) fromDate:today];
}

- (TFHpple *)downloadMenuForDateComponents:(NSDateComponents *)components {
    NSInteger day = [components day];
    NSInteger month = [components month];
    NSInteger year = [components year];
    return [self downloadMenuForMonth:month Day:day Year:year];
}

- (TFHpple *)downloadMenuForMonth:(NSInteger)month Day:(NSInteger)day Year:(NSInteger)year {
    // Grab the data from the web for today's menu
    NSData * data = [NSData dataWithContentsOfURL:
                     [NSURL URLWithString:
                      [NSString stringWithFormat:
                       @"http://vanderbilt.mymenumanager.net/menu.php?date=%d,%d,%d&location=-1",
                       month, day, year]]];
    
    // Transform data into HTML parseable document
    return [[TFHpple alloc] initWithHTMLData:data];
}

- (void)parseHppleMenu:(TFHpple *)doc {
    // Perform various searches on tags
    NSArray * locations  = [doc searchWithXPathQuery:@"//td [@class='location_title']"];
    NSArray * subheaders = [doc searchWithXPathQuery:@"//td [@class='displaytext'] [@valign='bottom']"];
    NSArray * mealPeriods = [doc searchWithXPathQuery:@"//td [@class='displaytext'] [@valign='top']"];
    NSArray * menus = [doc searchWithXPathQuery:@"//table [@width='100%'] [@border='0'] [@cellpadding='0'] [@cellspacing='0'] [@class='text']"];
    
    // For each location element
    for (TFHppleElement *location in locations) {
        // Get the index of that element
        int index = [locations indexOfObject:location];
        
        // Grab the subheader and meal period
        TFHppleElement *subHeader = [subheaders objectAtIndex:index];
        TFHppleElement *meal = [mealPeriods objectAtIndex:index];
        
        // Display that in the log
        NSLog(@"%@ - %@ (%@)", [location text], [subHeader text], [meal text]);
        
        // Grab the menu list
        TFHppleElement *menu = [[[menus objectAtIndex:index]
                                 firstChild]
                                firstChild];
        menu = [menu.children objectAtIndex:1];
        
        // Grab each item in that menu, place them in an array
        NSArray *menuItems = [menu childrenWithTagName:@"li"];
        
        // For each of those items, display it neatly
        for (TFHppleElement *menuItem in menuItems) {
            NSLog(@"   * %@", menuItem.text);
        }
    }
}