Emoji picker: Handle Emoji parsing with EmojiService.

Riot/Modules/Room/EmojiPicker/Data/EmojiService.swift

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+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+enum EmojiServiceError: Error {
+    case emojiJSONFileNotFound
+}
+
+final class EmojiService: EmojiServiceType {
+    
+    // MARK: - Constants
+    
+    private static let jsonFilename = "apple_emojis_data"
+    
+    // MARK: - Properties
+    
+    private let serializationService: SerializationServiceType = SerializationService()
+    private let serviceQueue = DispatchQueue(label: "\(type(of: EmojiService.self))")
+    
+    // MARK: - Public
+    
+    func getEmojiCategories(completion: @escaping (MXResponse<[EmojiCategory]>) -> Void) {
+        self.serviceQueue.async {
+            do {
+                let emojiJSONData = try self.getEmojisJSONData()
+                let emojiJSONStore: EmojiJSONStore = try self.serializationService.deserialize(emojiJSONData)
+                let emojiCategories = self.emojiCategories(from: emojiJSONStore)
+                completion(MXResponse.success(emojiCategories))
+            } catch {
+                completion(MXResponse.failure(error))
+            }
+        }
+    }
+    
+    // MARK: - Private
+    
+    private func getEmojisJSONData() throws -> Data {
+        guard let jsonDataURL = Bundle.main.url(forResource: EmojiService.jsonFilename, withExtension: "json") else {
+                throw EmojiServiceError.emojiJSONFileNotFound
+        }
+        let jsonData = try Data(contentsOf: jsonDataURL)
+        return jsonData
+    }
+    
+    private func emojiCategories(from emojiJSONStore: EmojiJSONStore) -> [EmojiCategory] {
+        let allEmojiItems = emojiJSONStore.emojis
+        
+        return emojiJSONStore.categories.map { (jsonCategory) -> EmojiCategory in
+            let emojiItems = jsonCategory.emojiIdentifiers.compactMap({ (emojiIdentifier) -> EmojiItem? in
+                return allEmojiItems.first(where: { $0.identifier == emojiIdentifier })
+            })
+            return EmojiCategory(identifier: jsonCategory.identifier, emojis: emojiItems)
+        }
+    }
+
+}

Riot/Modules/Room/EmojiPicker/Data/EmojiServiceType.swift

@@ -0,0 +1,21 @@
+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+protocol EmojiServiceType {
+    func getEmojiCategories(completion: @escaping (MXResponse<[EmojiCategory]>) -> Void)
+}

Riot/Modules/Room/EmojiPicker/Data/JSON/EmojiItem+Decodable.swift

@@ -0,0 +1,74 @@
+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+extension EmojiItem: Decodable {
+    
+    enum CodingKeys: String, CodingKey {
+        case code = "b"
+        case name = "a"
+        case shortNames = "n"
+        case keywords = "j"
+    }
+    
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        
+        guard let identifier = decoder.codingPath.last?.stringValue else {
+            throw DecodingError.dataCorruptedError(forKey: .code, in: container, debugDescription: "Cannot initialize identifier")
+        }
+        
+        let emojiUnicodeStringValue = try container.decode(String.self, forKey: .code)
+        
+        let unicodeStringComponents = emojiUnicodeStringValue.components(separatedBy: "-")
+        
+        var emoji = ""
+        
+        for unicodeStringComponent in unicodeStringComponents {
+            if let unicodeCodePoint = Int(unicodeStringComponent, radix: 16),
+                let emojiUnicodeScalar = UnicodeScalar(unicodeCodePoint) {
+                emoji.append(String(emojiUnicodeScalar))
+            } else {
+                throw DecodingError.dataCorruptedError(forKey: .code, in: container, debugDescription: "Cannot initialize emoji")
+            }
+        }
+        
+        let name = try container.decode(String.self, forKey: .name)
+        
+        let shortNames: [String]
+        
+        if let decodedShortNames = try container.decodeIfPresent([String].self, forKey: .shortNames) {
+            shortNames = decodedShortNames
+        } else {
+            shortNames = []
+        }
+        
+        let keywords: [String]
+        
+        if let decodedKeywords = try container.decodeIfPresent([String].self, forKey: .keywords) {
+            keywords = decodedKeywords
+        } else {
+            keywords = []
+        }
+        
+        self.init(identifier: identifier,
+                  value: emoji,
+                  name: name,
+                  shortNames: shortNames,
+                  keywords: keywords)
+    }
+}

Riot/Modules/Room/EmojiPicker/Data/JSON/EmojiJSONCategory.swift

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+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+struct EmojiJSONCategory {
+    let identifier: String
+    let name: String
+    let emojiIdentifiers: [String]
+}
+
+// MARK: - Decodable
+extension EmojiJSONCategory: Decodable {
+    
+    enum CodingKeys: String, CodingKey {
+        case identifier = "id"
+        case name
+        case emojiIdentifiers = "emojis"
+    }
+}

Riot/Modules/Room/EmojiPicker/Data/JSON/EmojiJSONStore.swift

@@ -0,0 +1,65 @@
+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+struct EmojiJSONStore {
+    let categories: [EmojiJSONCategory]
+    let emojis: [EmojiItem]
+}
+
+// MARK: - Decodable
+extension EmojiJSONStore: Decodable {
+    
+    enum CodingKeys: String, CodingKey {
+        case categories
+        case emojis
+    }
+    
+    struct EmojiKey: CodingKey {
+        var stringValue: String
+        
+        init?(stringValue: String) {
+            self.stringValue = stringValue
+        }
+        
+        var intValue: Int? { return nil }
+        init?(intValue: Int) { return nil }
+    }
+    
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        
+        let emojisContainer = try container.nestedContainer(keyedBy: EmojiKey.self, forKey: .emojis)
+        
+        let emojis: [EmojiItem] = emojisContainer.allKeys.compactMap { (emojiKey) -> EmojiItem? in
+            let emojiItem: EmojiItem?
+            
+            do {
+                emojiItem = try emojisContainer.decode(EmojiItem.self, forKey: emojiKey)
+            } catch {
+                print(error)
+                emojiItem = nil
+            }
+            
+            return emojiItem
+        }
+        
+        let categories = try container.decode([EmojiJSONCategory].self, forKey: .categories)
+        
+        self.init(categories: categories, emojis: emojis)
+    }
+}

Riot/Modules/Room/EmojiPicker/Data/Store/EmojiCategory.swift

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+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+struct EmojiCategory {
+    let identifier: String
+    let emojis: [EmojiItem]
+    
+    var name: String {
+        let categoryNameLocalizationKey = "emoji_picker_\(self.identifier)_category"
+        return VectorL10n.tr("Vector", categoryNameLocalizationKey)
+    }
+}

Riot/Modules/Room/EmojiPicker/Data/Store/EmojiItem.swift

@@ -0,0 +1,41 @@
+/*
+ Copyright 2019 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import Foundation
+
+struct EmojiItem {
+    let identifier: String
+    let value: String
+    let name: String
+    let shortNames: [String]
+    let keywords: [String]    
+    let variations: [EmojiItem]
+    
+    init(identifier: String,
+         value: String,
+         name: String,
+         shortNames: [String] = [],
+         keywords: [String] = [],
+         variations: [EmojiItem] = []) {
+        
+        self.identifier = identifier
+        self.value = value
+        self.name = name
+        self.shortNames = shortNames
+        self.keywords = keywords
+        self.variations = variations
+    }
+}