RETableViewManager/RETableViewManager/RETableViewManager.m

//
// RETableViewManager.m
// RETableViewManager
//
// Copyright (c) 2013 Roman Efimov (https://github.com/romaonthego)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#import "RETableViewManager.h"

@implementation RETableViewManager

- (id)init
{
    self = [super init];
    if (!self)
        return nil;
    
    _sections = [[NSMutableArray alloc] init];
    _mapping = [[NSMutableDictionary alloc] init];
    
    [self setDefaultMapping];
    
    return self;
}

- (void)setDefaultMapping
{
    [self mapObjectClass:@"NSString" toTableViewCellClass:@"RETableViewStringCell"];
    [self mapObjectClass:@"REStringItem" toTableViewCellClass:@"RETableViewStringCell"];
    [self mapObjectClass:@"REBoolItem" toTableViewCellClass:@"RETableViewBoolCell"];
    [self mapObjectClass:@"RETextItem" toTableViewCellClass:@"RETableViewTextCell"];
}

- (void)addSection:(RETableViewSection *)section
{
    [_sections addObject:section];
}

- (void)mapObjectClass:(NSString *)objectClass toTableViewCellClass:(NSString *)cellViewClass
{
    [_mapping setObject:cellViewClass forKey:objectClass];
}

- (Class)classForCellAtIndexPath:(NSIndexPath *)indexPath
{
    RETableViewSection *section = [_sections objectAtIndex:indexPath.section];
    NSObject *item = [section.items objectAtIndex:indexPath.row];
    Class cellClass;
    for (NSString *className in _mapping) {
        Class objectClass = NSClassFromString(className);
        if ([item isKindOfClass:objectClass]) {
            cellClass = NSClassFromString([_mapping objectForKey:className]);
            break;
        }
    }
    return cellClass;
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return _sections.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    return section.items.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    RETableViewSection *section = [_sections objectAtIndex:indexPath.section];
    NSObject *item = [section.items objectAtIndex:indexPath.row];
    NSString *cellIdentifier = [NSString stringWithFormat:@"RETableViewManager_%@", [item class]];
  
    Class cellClass = [self classForCellAtIndexPath:indexPath];
    
    RETableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[cellClass alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    
    cell.row = indexPath.row;
    cell.sectionIndex = indexPath.section;
    cell.parentTableView = tableView;
    cell.section = section;
    cell.item = item;
    [cell prepare];
    
    if ([_delegate respondsToSelector:@selector(tableView:styleCell:atIndexPath:)])
        [_delegate tableView:tableView styleCell:cell atIndexPath:indexPath];
    
    return cell;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return [[self classForCellAtIndexPath:indexPath] height];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    return section.headerTitle;
}

- (NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    return section.footerTitle;
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    return section.headerView;
}

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    return section.footerView;
}

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    if (section.headerView)
        return section.headerView.frame.size.height;
    return UITableViewAutomaticDimension;
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)sectionIndex
{
    RETableViewSection *section = [_sections objectAtIndex:sectionIndex];
    if (section.footerView)
        return section.footerView.frame.size.height;
    return UITableViewAutomaticDimension;
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    RETableViewSection *section = [_sections objectAtIndex:indexPath.section];
    id item = [section.items objectAtIndex:indexPath.row];
    if ([item respondsToSelector:@selector(setActionBlock:)]) {
        RETableViewItem *actionItem = (RETableViewItem *)item;
        if (actionItem.actionBlock && actionItem.performActionOnSelection)
            actionItem.actionBlock(item);
    }
    
    if ([_delegate respondsToSelector:@selector(tableView:didSelectRowAtIndexPath:)])
        [_delegate tableView:tableView didSelectRowAtIndexPath:indexPath];
    
    if ([_delegate respondsToSelector:@selector(tableView:didSelectRowAtIndexPath:item:)])
        [_delegate tableView:tableView didSelectRowAtIndexPath:indexPath item:item];
}

@end