1 files changed, 86 insertions, 0 deletions
diff --git a/src/main/kotlin/pl/treksoft/kvision/Application.kt b/src/main/kotlin/pl/treksoft/kvision/Application.kt
new file mode 100644
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+++ b/src/main/kotlin/pl/treksoft/kvision/Application.kt
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2017-present Robert Jaros
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package pl.treksoft.kvision
+
+import pl.treksoft.kvision.panel.Root
+import kotlin.browser.document
+
+/**
+ * Base class for KVision applications.
+ */
+abstract class Application {
+
+    /**
+     * Starting point for an application.
+     */
+    open fun start() {}
+
+    /**
+     * Starting point for an application with the state managed by Hot Module Replacement (HMR).
+     * @param state Initial state for Hot Module Replacement (HMR).
+     */
+    open fun start(state: Map<String, Any>) {
+        start()
+    }
+
+    /**
+     * Ending point for an application.
+     * @return final state for Hot Module Replacement (HMR).
+     */
+    open fun dispose(): Map<String, Any> {
+        return mapOf()
+    }
+}
+
+/**
+ * Main function for creating KVision applications.
+ */
+fun startApplication(builder: () -> Application) {
+
+    fun start(state: dynamic): Application? {
+        val application = builder()
+        @Suppress("UnsafeCastFromDynamic")
+        application.start(state?.appState ?: emptyMap())
+        return application
+    }
+
+    var application: Application? = null
+
+    val state: dynamic = module.hot?.let { hot ->
+        hot.accept()
+
+        hot.dispose { data ->
+            Root.disposeAllRoots()
+            data.appState = application?.dispose()
+            application = null
+        }
+
+        hot.data
+    }
+
+    if (document.body != null) {
+        application = start(state)
+    } else {
+        application = null
+        document.addEventListener("DOMContentLoaded", { application = start(state) })
+    }
+}