Implement database access (with migrations)

ios/uhabits/AppDelegate.swift

@@ -1,22 +1,35 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 import Foundation
+import SQLite3
 
 @UIApplicationMain
-
 class AppDelegate: UIResponder, UIApplicationDelegate {
   var window: UIWindow?
   var bridge: RCTBridge!
-  static var backend = Backend()
+  
+  static var backend = Backend(databaseOpener: IosDatabaseOpener(),
+                               fileOpener: IosFileOpener(),
+                               log: IosLog())
   
   func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
-    AppDelegate.backend.createHabit(name: "Wake up early")
-    AppDelegate.backend.createHabit(name: "Wash clothes")
-    AppDelegate.backend.createHabit(name: "Exercise")
-    AppDelegate.backend.createHabit(name: "Meditate")
-    AppDelegate.backend.createHabit(name: "Take vitamins")
-    AppDelegate.backend.createHabit(name: "Write 'the quick brown fox jumps over the lazy dog' daily")
-    AppDelegate.backend.createHabit(name: "Write journal")
-    AppDelegate.backend.createHabit(name: "Study French")
-    
     let jsCodeLocation = RCTBundleURLProvider.sharedSettings().jsBundleURL(forBundleRoot: "index.ios", fallbackResource: nil)
     let rootView = RCTRootView(bundleURL: jsCodeLocation, moduleName: "LoopHabitTracker", initialProperties: nil, launchOptions: launchOptions)
     rootView?.backgroundColor = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)

ios/uhabits/BridgingHeader.h

@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #import <React/RCTBundleURLProvider.h>
 #import <React/RCTRootView.h>
 #import <React/RCTBridgeModule.h>

ios/uhabits/CoreModule.swift

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import Foundation
+
+extension String: Error {}
+
+@objc(CoreModule)
+class CoreModule: RCTEventEmitter {
+  
+  func convert(_ obj: Any?) -> Any? {
+    if obj is KotlinInt {
+      return (obj as! KotlinInt).intValue
+    }
+    if obj is NSString {
+      return obj
+    }
+    if obj is Dictionary<String, Any> {
+      return (obj as! Dictionary<String, Any>).mapValues{ convert($0) }
+    }
+    if obj is Array<Any> {
+      return (obj as! Array<Any>).map { convert($0) }
+    }
+    return nil
+  }
+  
+  @objc
+  open override func supportedEvents() -> [String] {
+    return ["onHabitList"]
+  }
+  
+  @objc
+  func requestHabitList() {
+    DispatchQueue.main.async {
+      let result = AppDelegate.backend.getHabitList()
+      self.sendEvent(withName: "onHabitList", body: self.convert(result))
+    }
+  }
+  
+  @objc
+  func createHabit(_ name: String) {
+    DispatchQueue.main.async {
+      AppDelegate.backend.createHabit(name: name)
+    }
+  }
+  
+  @objc
+  func deleteHabit(_ id: Int32) {
+    DispatchQueue.main.async {
+      AppDelegate.backend.deleteHabit(id: id)
+    }
+  }
+  
+  @objc
+  func updateHabit(_ id: Int32, _ name: String) {
+    DispatchQueue.main.async {
+      AppDelegate.backend.updateHabit(id: id, name: name)
+    }
+  }
+  
+  @objc
+  override static func requiresMainQueueSetup() -> Bool {
+    return true
+  }
+}

ios/uhabits/CoreModuleBridge.m

@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #import <Foundation/Foundation.h>
 #import <React/RCTBridgeModule.h>
 #import <React/RCTEventEmitter.h>

ios/uhabits/IosDatabase.swift

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import Foundation
+import SQLite3
+
+internal let SQLITE_STATIC = unsafeBitCast(0, to: sqlite3_destructor_type.self)
+internal let SQLITE_TRANSIENT = unsafeBitCast(-1, to: sqlite3_destructor_type.self)
+
+class IosPreparedStatement : NSObject, PreparedStatement {
+
+  var db: OpaquePointer
+  var statement: OpaquePointer
+  
+  init(withStatement statement: OpaquePointer, withDb db: OpaquePointer) {
+    self.statement = statement
+    self.db = db
+  }
+  
+  func step() -> StepResult {
+    let result = sqlite3_step(statement)
+    if result == SQLITE_ROW {
+      return StepResult.row
+    } else if result == SQLITE_DONE {
+      return StepResult.done
+    } else {
+      let errMsg = String(cString: sqlite3_errmsg(db)!)
+      fatalError("Database error: \(errMsg) (\(result))")
+    }
+  }
+  
+  func getInt(index: Int32) -> Int32 {
+    return sqlite3_column_int(statement, index)
+  }
+  
+  func getText(index: Int32) -> String {
+    return String(cString: sqlite3_column_text(statement, index))
+  }
+  
+  func bindInt(index: Int32, value: Int32) {
+    sqlite3_bind_int(statement, index, value)
+  }
+  
+  func bindText(index: Int32, value: String) {
+    sqlite3_bind_text(statement, index, value, -1, SQLITE_TRANSIENT)
+  }
+  
+  func reset() {
+    sqlite3_reset(statement)
+  }
+  
+  override func finalize() {
+    sqlite3_finalize(statement)
+  }
+}
+
+class IosDatabase : NSObject, Database {
+  var db: OpaquePointer
+  
+  init(withDb db: OpaquePointer) {
+    self.db = db
+  }
+  
+  func prepareStatement(sql: String) -> PreparedStatement {
+    if sql.isEmpty {
+      fatalError("Provided SQL query is empty")
+    }
+    print("Running SQL: \(sql)")
+    var statement : OpaquePointer?
+    let result = sqlite3_prepare_v2(db, sql, -1, &statement, nil)
+    if result == SQLITE_OK {
+      return IosPreparedStatement(withStatement: statement!, withDb: db)
+    } else {
+      let errMsg = String(cString: sqlite3_errmsg(db)!)
+      fatalError("Database error: \(errMsg)")
+    }
+  }
+  
+  func close() {
+    sqlite3_close(db)
+  }
+}
+
+class IosDatabaseOpener : NSObject, DatabaseOpener {
+  func open(file: UserFile) -> Database {
+    let dbPath = (file as! IosUserFile).path
+    
+    let version = String(cString: sqlite3_libversion())
+    print("SQLite \(version)")
+    print("Opening database: \(dbPath)")
+    var db: OpaquePointer?
+    let result = sqlite3_open(dbPath, &db)
+    if result == SQLITE_OK {
+      return IosDatabase(withDb: db!)
+    } else {
+      fatalError("Error opening database (code \(result))")
+    }
+  }
+}

ios/uhabits/IosFiles.swift

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import Foundation
+
+class IosResourceFile : NSObject, ResourceFile {
+  
+  var path: String
+  
+  var fileManager = FileManager.default
+  
+  init(forPath path: String) {
+    self.path = path
+  }
+  
+  func readLines() -> [String] {
+    do {
+      let contents = try String(contentsOfFile: self.path, encoding: .utf8)
+      return contents.components(separatedBy: CharacterSet.newlines)
+    } catch {
+      return [""]
+    }
+  }
+}
+
+class IosUserFile : NSObject, UserFile {
+  
+  var path: String
+  
+  init(forPath path: String) {
+    self.path = path
+  }
+  
+  func delete() {
+    do {
+      try FileManager.default.removeItem(atPath: path)
+    } catch {
+      
+    }
+  }
+  
+  func exists() -> Bool {
+    return FileManager.default.fileExists(atPath: path)
+  }
+}
+
+class IosFileOpener : NSObject, FileOpener {
+  func openResourceFile(filename: String) -> ResourceFile {
+    let path = "\(Bundle.main.resourcePath!)/\(filename)"
+    return IosResourceFile(forPath: path)
+  }
+  
+  func openUserFile(filename: String) -> UserFile {
+    do {
+      let root = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).path
+      return IosUserFile(forPath: "\(root)/\(filename)")
+    } catch {
+      return IosUserFile(forPath: "invalid")
+    }
+  }
+}

ios/uhabits/IosLog.swift

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016-2019 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import Foundation
+
+class IosLog : NSObject, Log {
+  func info(msg: String) {
+    print("[I] \(msg)")
+  }
+  
+  func debug(msg: String) {
+    print("[D] \(msg)")
+  }
+}