Add JVM target to shared module

shared/src/jvmMain/kotlin/net/underdesk/circolapp/shared/PlatformDispatcher.kt

@@ -0,0 +1,7 @@
+package net.underdesk.circolapp.shared
+
+import kotlinx.coroutines.Dispatchers
+
+actual object PlatformDispatcher {
+    actual val IO = Dispatchers.IO
+}

shared/src/jvmMain/kotlin/net/underdesk/circolapp/shared/data/DatabaseDriverFactory.kt

@@ -0,0 +1,33 @@
+package net.underdesk.circolapp.shared.data
+
+import com.squareup.sqldelight.db.SqlDriver
+import com.squareup.sqldelight.sqlite.driver.JdbcSqliteDriver
+
+actual class DatabaseDriverFactory {
+    actual fun createDriver(): SqlDriver {
+        return JdbcSqliteDriver(JdbcSqliteDriver.IN_MEMORY + "circolapp.db")
+            .also {
+                val currentVer = getVersion(it)
+                if (currentVer == 0) {
+                    AppDatabase.Schema.create(it)
+                    setVersion(it, 1)
+                } else {
+                    val schemaVer: Int = AppDatabase.Schema.version
+                    if (schemaVer > currentVer) {
+                        AppDatabase.Schema.migrate(it, currentVer, schemaVer)
+                        setVersion(it, schemaVer)
+                        println("init: migrated from $currentVer to $schemaVer")
+                    }
+                }
+            }
+    }
+
+    private fun getVersion(driver: SqlDriver): Int {
+        val sqlCursor = driver.executeQuery(null, "PRAGMA user_version;", 0, null)
+        return sqlCursor.getLong(0)!!.toInt()
+    }
+
+    private fun setVersion(driver: SqlDriver, version: Int) {
+        driver.execute(null, String.format("PRAGMA user_version = %d;", version), 0, null)
+    }
+}