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//
// CBLUITableSource.h
// CouchbaseLite
//
// Created by Jens Alfke on 8/2/11.
// Copyright 2011 Couchbase, Inc. All rights reserved.
//
#import <UIKit/UIKit.h>
@class CBLDocument, CBLLiveQuery, CBLQueryRow;
/** A UITableView data source driven by a CBLLiveQuery.
It populates the table rows from the query rows, and automatically updates the table as the
query results change when the database is updated.
A CBLUITableSource can be created in a nib. If so, its tableView outlet should be wired up to
the UITableView it manages, and the table view's dataSource outlet should be wired to it. */
@interface CBLUITableSource : NSObject <UITableViewDataSource
#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED >= 60000)
, UIDataSourceModelAssociation
#endif
>
/** The table view to manage. */
@property (nonatomic, retain) IBOutlet UITableView* tableView;
/** The query whose rows will be displayed in the table. */
@property (retain) CBLLiveQuery* query;
/** Rebuilds the table from the query's current .rows property. */
-(void) reloadFromQuery;
#pragma mark Row Accessors:
/** The current array of CBLQueryRows being used as the data source for the table. */
@property (nonatomic, readonly) NSArray* rows;
/** Convenience accessor to get the row object for a given table row index. */
- (CBLQueryRow*) rowAtIndex: (NSUInteger)index;
/** Convenience accessor to find the index path of the row with a given document. */
- (NSIndexPath*) indexPathForDocument: (CBLDocument*)document __attribute__((nonnull));
/** Convenience accessor to return the query row at a given index path. */
- (CBLQueryRow*) rowAtIndexPath: (NSIndexPath*)path __attribute__((nonnull));
/** Convenience accessor to return the document at a given index path. */
- (CBLDocument*) documentAtIndexPath: (NSIndexPath*)path __attribute__((nonnull));
#pragma mark Displaying The Table:
/** If non-nil, specifies the property name of the query row's value that will be used for the table row's visible label.
If the row's value is not a dictionary, or if the property doesn't exist, the property will next be looked up in the document's properties.
If this doesn't meet your needs for labeling rows, you should implement -couchTableSource:willUseCell:forRow: in the table's delegate. */
@property (copy) NSString* labelProperty;
#pragma mark Editing The Table:
/** Is the user allowed to delete rows by UI gestures? (Defaults to YES.) */
@property (nonatomic) BOOL deletionAllowed;
/** Deletes the documents at the given row indexes, animating the removal from the table. */
- (BOOL) deleteDocumentsAtIndexes: (NSArray*)indexPaths
error: (NSError**)outError __attribute__((nonnull(1)));
/** Asynchronously deletes the given documents, animating the removal from the table. */
- (BOOL) deleteDocuments: (NSArray*)documents
error: (NSError**)outError __attribute__((nonnull(1)));
@end
/** Additional methods for the table view's delegate, that will be invoked by the CBLUITableSource. */
@protocol CBLUITableDelegate <UITableViewDelegate>
@optional
/** Allows delegate to return its own custom cell, just like -tableView:cellForRowAtIndexPath:.
If this returns nil the table source will create its own cell, as if this method were not implemented. */
- (UITableViewCell *)couchTableSource:(CBLUITableSource*)source
cellForRowAtIndexPath:(NSIndexPath *)indexPath;
/** Called after the query's results change, before the table view is reloaded. */
- (void)couchTableSource:(CBLUITableSource*)source
willUpdateFromQuery:(CBLLiveQuery*)query;
/** Called after the query's results change to update the table view. If this method is not implemented by the delegate, reloadData is called on the table view.*/
- (void)couchTableSource:(CBLUITableSource*)source
updateFromQuery:(CBLLiveQuery*)query
previousRows:(NSArray *)previousRows;
/** Called from -tableView:cellForRowAtIndexPath: just before it returns, giving the delegate a chance to customize the new cell. */
- (void)couchTableSource:(CBLUITableSource*)source
willUseCell:(UITableViewCell*)cell
forRow:(CBLQueryRow*)row;
/** Called upon failure of a document deletion triggered by the user deleting a row. */
- (void)couchTableSource:(CBLUITableSource*)source
deleteFailed:(NSError*)error;
@end
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