Jorge Canizales | e8304d5 | 2015-02-17 19:50:51 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Yang Gao | 5fc9029 | 2015-02-20 09:46:22 -0800 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Jorge Canizales | e8304d5 | 2015-02-17 19:50:51 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Jorge Canizales | 30697c9 | 2015-02-17 17:09:14 -0800 | [diff] [blame] | 34 | #import "GRXWriteable.h" |
| 35 | |
| 36 | @implementation GRXWriteable { |
| 37 | GRXValueHandler _valueHandler; |
| 38 | GRXCompletionHandler _completionHandler; |
| 39 | } |
| 40 | |
Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 41 | + (instancetype)writeableWithSingleValueHandler:(GRXSingleValueHandler)handler { |
| 42 | if (!handler) { |
| 43 | return [[self alloc] init]; |
| 44 | } |
| 45 | return [[self alloc] initWithValueHandler:^(id value) { |
| 46 | handler(value, nil); |
| 47 | } completionHandler:^(NSError *errorOrNil) { |
| 48 | if (errorOrNil) { |
| 49 | handler(nil, errorOrNil); |
| 50 | } |
| 51 | }]; |
| 52 | } |
| 53 | |
| 54 | + (instancetype)writeableWithStreamHandler:(GRXStreamHandler)handler { |
| 55 | if (!handler) { |
| 56 | return [[self alloc] init]; |
| 57 | } |
| 58 | return [[self alloc] initWithValueHandler:^(id value) { |
| 59 | handler(NO, value, nil); |
| 60 | } completionHandler:^(NSError *errorOrNil) { |
| 61 | handler(YES, nil, errorOrNil); |
| 62 | }]; |
| 63 | } |
| 64 | |
Jorge Canizales | 30697c9 | 2015-02-17 17:09:14 -0800 | [diff] [blame] | 65 | - (instancetype)init { |
| 66 | return [self initWithValueHandler:nil completionHandler:nil]; |
| 67 | } |
| 68 | |
| 69 | // Designated initializer |
| 70 | - (instancetype)initWithValueHandler:(GRXValueHandler)valueHandler |
| 71 | completionHandler:(GRXCompletionHandler)completionHandler { |
| 72 | if ((self = [super init])) { |
| 73 | _valueHandler = valueHandler; |
| 74 | _completionHandler = completionHandler; |
| 75 | } |
| 76 | return self; |
| 77 | } |
| 78 | |
Jorge Canizales | a90a9c3 | 2015-05-18 17:12:41 -0700 | [diff] [blame] | 79 | - (void)writeValue:(id)value { |
Jorge Canizales | 30697c9 | 2015-02-17 17:09:14 -0800 | [diff] [blame] | 80 | if (_valueHandler) { |
| 81 | _valueHandler(value); |
| 82 | } |
| 83 | } |
| 84 | |
Jorge Canizales | b2c300c | 2015-05-18 17:19:16 -0700 | [diff] [blame] | 85 | - (void)writesFinishedWithError:(NSError *)errorOrNil { |
Jorge Canizales | 30697c9 | 2015-02-17 17:09:14 -0800 | [diff] [blame] | 86 | if (_completionHandler) { |
| 87 | _completionHandler(errorOrNil); |
| 88 | } |
| 89 | } |
| 90 | @end |