Implement JsDatabase using sql.js

core/src/commonMain/kotlin/org/isoron/platform/io/Database.kt

@@ -47,7 +47,7 @@ interface Database {
     fun close()
 }
 
-fun Database.runInBackground(sql: String) {
+fun Database.run(sql: String) {
     val stmt = prepareStatement(sql)
     stmt.step()
     stmt.finalize()
@@ -72,13 +72,13 @@ fun Database.nextId(tableName: String): Int {
     }
 }
 
-fun Database.begin() = runInBackground("begin")
+fun Database.begin() = run("begin")
 
-fun Database.commit() = runInBackground("commit")
+fun Database.commit() = run("commit")
 
 fun Database.getVersion() = queryInt("pragma user_version")
 
-fun Database.setVersion(v: Int) = runInBackground("pragma user_version = $v")
+fun Database.setVersion(v: Int) = run("pragma user_version = $v")
 
 fun Database.migrateTo(newVersion: Int, fileOpener: FileOpener, log: Log) {
     val currentVersion = getVersion()
@@ -96,7 +96,7 @@ fun Database.migrateTo(newVersion: Int, fileOpener: FileOpener, log: Log) {
         val migrationFile = fileOpener.openResourceFile(filename)
         for (line in migrationFile.readLines()) {
             if (line.isEmpty()) continue
-            runInBackground(line)
+            run(line)
         }
         setVersion(v)
     }

core/src/commonTest/kotlin/org/isoron/platform/io/DatabaseTest.kt

@@ -0,0 +1,60 @@
+/*
+ * 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/>.
+ */
+
+package org.isoron.platform.io
+
+import kotlin.test.assertEquals
+
+class DatabaseTest(val db: Database) {
+    fun testUsage() {
+        db.setVersion(0)
+        assertEquals(0, db.getVersion())
+
+        db.setVersion(23)
+        assertEquals(23, db.getVersion())
+
+        var stmt = db.prepareStatement("drop table if exists demo")
+        stmt.step()
+        stmt.finalize()
+
+        stmt = db.prepareStatement("create table if not exists demo(key int, value text)")
+        stmt.step()
+        stmt.finalize()
+
+        stmt = db.prepareStatement("insert into demo(key, value) values (?, ?)")
+        stmt.bindInt(0, 42)
+        stmt.bindText(1, "Hello World")
+        stmt.step()
+        stmt.finalize()
+
+        stmt = db.prepareStatement("select * from demo where key > ?")
+        stmt.bindInt(0, 10)
+
+        var result = stmt.step()
+        assertEquals(StepResult.ROW, result)
+        assertEquals(42, stmt.getInt(0))
+        assertEquals("Hello World", stmt.getText(1))
+
+        result = stmt.step()
+        assertEquals(StepResult.DONE, result)
+
+        stmt.finalize()
+        db.close()
+    }
+}

core/src/jsMain/kotlin/org/isoron/platform/io/JsDatabase.kt

@@ -0,0 +1,80 @@
+/*
+ * 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/>.
+ */
+
+package org.isoron.platform.io
+
+external fun require(module: String): dynamic
+
+class JsPreparedStatement(val stmt: dynamic) : PreparedStatement {
+
+    override fun step(): StepResult {
+        val isRowAvailable = stmt.step() as Boolean
+        return if(isRowAvailable) StepResult.ROW else StepResult.DONE
+    }
+
+    override fun finalize() {
+    }
+
+    override fun getInt(index: Int): Int {
+        return (stmt.getNumber(index) as Double).toInt()
+    }
+
+    override fun getLong(index: Int): Long {
+        return (stmt.getNumber(index) as Double).toLong()
+    }
+
+    override fun getText(index: Int): String {
+        return stmt.getString(index) as String
+    }
+
+    override fun getReal(index: Int): Double {
+        return stmt.getNumber(index) as Double
+    }
+
+    override fun bindInt(index: Int, value: Int) {
+        stmt.bindNumber(value, index + 1)
+    }
+
+    override fun bindLong(index: Int, value: Long) {
+        stmt.bindNumber(value, index + 1)
+    }
+
+    override fun bindText(index: Int, value: String) {
+        stmt.bindString(value, index + 1)
+    }
+
+    override fun bindReal(index: Int, value: Double) {
+        stmt.bindNumber(value, index + 1)
+    }
+
+    override fun reset() {
+        stmt.reset()
+    }
+
+}
+
+class JsDatabase(val db: dynamic) : Database {
+    override fun prepareStatement(sql: String): PreparedStatement {
+        println(sql)
+        return JsPreparedStatement(db.prepare(sql))
+    }
+
+    override fun close() {
+    }
+}

core/src/jsTest/kotlin/org/isoron/platform/io/JsDatabaseTest.kt

@@ -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/>.
+ */
+
+package org.isoron.platform.io
+
+import kotlin.test.*
+
+class JsDatabaseTest {
+    @Test
+    fun testUsage() {
+        val db = eval("new SQL.Database()")
+        DatabaseTest(JsDatabase(db)).testUsage()
+    }
+}

core/src/jvmTest/kotlin/org/isoron/platform/io/JavaDatabaseTest.kt

@@ -27,38 +27,6 @@ import kotlin.test.assertEquals
 class JavaDatabaseTest : BaseTest() {
     @Test
     fun testUsage() {
-        db.setVersion(0)
-        assertEquals(db.getVersion(), 0)
-
-        db.setVersion(23)
-        assertEquals(db.getVersion(), 23)
-
-        var stmt = db.prepareStatement("drop table if exists demo")
-        stmt.step()
-        stmt.finalize()
-
-        stmt = db.prepareStatement("create table if not exists demo(key int, value text)")
-        stmt.step()
-        stmt.finalize()
-
-        stmt = db.prepareStatement("insert into demo(key, value) values (?, ?)")
-        stmt.bindInt(0, 42)
-        stmt.bindText(1, "Hello World")
-        stmt.step()
-        stmt.finalize()
-
-        stmt = db.prepareStatement("select * from demo where key > ?")
-        stmt.bindInt(0, 10)
-
-        var result = stmt.step()
-        assertEquals(result, StepResult.ROW)
-        assertEquals(stmt.getInt(0), 42)
-        assertEquals(stmt.getText(1), "Hello World")
-
-        result = stmt.step()
-        assertEquals(result, StepResult.DONE)
-
-        stmt.finalize()
-        db.close()
+        DatabaseTest(db).testUsage()
     }
 }