Add post auto update

src/commonMain/kotlin/de/kif/common/model/Post.kt

@@ -1,8 +1,10 @@
 package de.kif.common.model
 
 import de.kif.common.SearchElement
+import kotlinx.serialization.Serializable
 import kotlin.random.Random
 
+@Serializable
 data class Post(
     override val id: Long? = null,
     val name: String,

src/jsMain/kotlin/de/kif/frontend/WebSocketClient.kt

@@ -61,7 +61,8 @@ class WebSocketClient() {
         ScheduleRepository.handler,
         TrackRepository.handler,
         UserRepository.handler,
-        WorkGroupRepository.handler
+        WorkGroupRepository.handler,
+        PostRepository.handler
     )
 
     init {

src/jsMain/kotlin/de/kif/frontend/main.kt

@@ -1,8 +1,10 @@
 package de.kif.frontend
 
 import de.kif.frontend.views.calendar.initCalendar
-import de.kif.frontend.views.initTableLayout
+import de.kif.frontend.views.table.initTableLayout
 import de.kif.frontend.views.initWorkGroupConstraints
+import de.kif.frontend.views.overview.initOverviewMain
+import de.kif.frontend.views.overview.initPosts
 import de.westermann.kwebview.components.init
 import kotlin.browser.document
 
@@ -18,4 +20,10 @@ fun main() = init {
     if (document.getElementsByClassName("work-group-constraints").length > 0) {
         initWorkGroupConstraints()
     }
+    if (document.getElementsByClassName("overview-main").length > 0) {
+        initOverviewMain()
+    }
+    if (document.getElementsByClassName("post").length > 0) {
+        initPosts()
+    }
 }

src/jsMain/kotlin/de/kif/frontend/repository/Ajax.kt

@@ -82,6 +82,30 @@ suspend fun repositoryPost(
     }
 }
 
+suspend fun repositoryRawGet(
+    url: String
+): String {
+    console.log("GET: $url")
+    val promise = Promise<String> { resolve, reject ->
+        val xhttp = XMLHttpRequest()
+
+        xhttp.onreadystatechange = {
+            if (xhttp.readyState == 4.toShort()) {
+                if (xhttp.status == 200.toShort() || xhttp.status == 304.toShort()) {
+                    resolve(xhttp.responseText)
+                } else {
+                    reject(NoSuchElementException("${xhttp.status}: ${xhttp.statusText}"))
+                }
+            }
+        }
+        xhttp.open("GET", url, true)
+
+        xhttp.send()
+    }
+
+    return promise.await()
+}
+
 suspend fun <T> Promise<T>.await(): T = suspendCoroutine { cont ->
     then({ cont.resume(it) }, { cont.resumeWithException(it) })
 }

src/jsMain/kotlin/de/kif/frontend/repository/PostRepository.kt

@@ -0,0 +1,56 @@
+package de.kif.frontend.repository
+
+import de.kif.common.Message
+import de.kif.common.Repository
+import de.kif.common.RepositoryType
+import de.kif.common.model.Post
+import de.kif.frontend.MessageHandler
+import de.westermann.kobserve.event.EventHandler
+import kotlinx.serialization.DynamicObjectParser
+import kotlinx.serialization.list
+
+object PostRepository : Repository<Post> {
+
+    override val onCreate = EventHandler<Long>()
+    override val onUpdate = EventHandler<Long>()
+    override val onDelete = EventHandler<Long>()
+
+    private val parser = DynamicObjectParser()
+
+    override suspend fun get(id: Long): Post? {
+        val json = repositoryGet("/api/post/$id") ?: return null
+        return parser.parse(json, Post.serializer())
+    }
+
+    override suspend fun create(model: Post): Long {
+        return repositoryPost("/api/posts", Message.json.stringify(Post.serializer(), model))
+            ?: throw IllegalStateException("Cannot create model!")
+    }
+
+    override suspend fun update(model: Post) {
+        if (model.id == null) throw IllegalStateException("Cannot update model which was not created!")
+        repositoryPost("/api/post/${model.id}", Message.json.stringify(Post.serializer(), model))
+    }
+
+    override suspend fun delete(id: Long) {
+        repositoryPost("/api/post/$id/delete")
+    }
+
+    override suspend fun all(): List<Post> {
+        val json = repositoryGet("/api/posts") ?: return emptyList()
+        return parser.parse(json, Post.serializer().list)
+    }
+
+    suspend fun htmlByUrl(url: String): String {
+        return repositoryRawGet("/api/p/$url")
+    }
+
+    val handler = object : MessageHandler(RepositoryType.POST) {
+
+        override fun onCreate(id: Long) = onCreate.emit(id)
+
+        override fun onUpdate(id: Long) = onUpdate.emit(id)
+
+        override fun onDelete(id: Long) = onDelete.emit(id)
+    }
+}

src/jsMain/kotlin/de/kif/frontend/views/overview/OverviewMain.kt

@@ -0,0 +1,41 @@
+package de.kif.frontend.views.overview
+
+import de.kif.frontend.iterator
+import de.kif.frontend.repository.PostRepository
+import org.w3c.dom.HTMLElement
+import org.w3c.dom.get
+import kotlin.browser.document
+
+fun initOverviewMain() {
+    val main = document.getElementsByClassName("overview-main")[0] as HTMLElement
+
+    PostRepository.onCreate {
+        val post = PostView.create(it)
+        post.classList += "overview-post"
+
+        val first = main.firstElementChild as? HTMLElement
+
+        if (first == null) {
+            main.appendChild(post.html)
+            return@onCreate
+        }
+        if (first.classList.contains("post")) {
+            main.insertBefore(post.html, first)
+            return@onCreate
+        }
+
+        val next = first.nextElementSibling as? HTMLElement
+        if (next == null) {
+            main.appendChild(post.html)
+        } else {
+            main.insertBefore(post.html, next)
+        }
+    }
+}
+
+fun initPosts() {
+    val postList = document.getElementsByClassName("post")
+    for (post in postList) {
+        PostView(post)
+    }
+}

src/jsMain/kotlin/de/kif/frontend/views/overview/PostView.kt

@@ -0,0 +1,69 @@
+package de.kif.frontend.views.overview
+
+import de.kif.common.model.Post
+import de.kif.frontend.launch
+import de.kif.frontend.repository.PostRepository
+import de.westermann.kwebview.View
+import de.westermann.kwebview.components.Link
+import de.westermann.kwebview.createHtmlView
+import org.w3c.dom.HTMLAnchorElement
+import org.w3c.dom.HTMLElement
+import org.w3c.dom.get
+import org.w3c.dom.set
+import kotlin.browser.document
+
+class PostView(
+    view: HTMLElement
+) : View(view) {
+
+    private var postId = dataset["id"]?.toLongOrNull() ?: -1
+
+    private val nameView: Link
+    private val contentView: View
+
+    private fun reload() {
+        launch {
+            val p = PostRepository.get(postId) ?: return@launch
+
+            nameView.text = p.name
+            nameView.target = "/p/${p.url}"
+
+            contentView.html.innerHTML = PostRepository.htmlByUrl(p.url)
+        }
+    }
+
+    init {
+        val nameHtml = view.getElementsByClassName("post-name")[0]
+        nameView = nameHtml?.let { Link.wrap(it as HTMLAnchorElement) } ?: Link().also {
+            html.appendChild(it.html)
+            it.classList += "post-name"
+        }
+
+        // val editHtml = view.getElementsByClassName("post-edit")[0]
+        // editView = editHtml?.let { Link.wrap(it as HTMLAnchorElement) } ?: Link()
+
+        val contentHtml = view.getElementsByClassName("post-content")[0]
+        contentView = contentHtml?.let { wrap(it as HTMLElement) } ?: wrap(createHtmlView()).also {
+            html.appendChild(it.html)
+            it.classList += "post-content"
+        }
+
+        PostRepository.onUpdate {
+            if (it == postId) {
+                reload()
+            }
+        }
+        PostRepository.onDelete {
+            html.remove()
+        }
+    }
+
+    companion object {
+        fun create(postId: Long): PostView {
+            val div = document.createElement("div") as HTMLElement
+            div.classList.add("post")
+            div.dataset["id"] = postId.toString()
+            return PostView(div).also(PostView::reload)
+        }
+    }
+}

src/jsMain/kotlin/de/kif/frontend/views/table/TableLayout.kt

@@ -1,9 +1,6 @@
-package de.kif.frontend.views
+package de.kif.frontend.views.table
 
 import de.kif.frontend.iterator
-import de.kif.frontend.views.table.RoomTableLine
-import de.kif.frontend.views.table.TableLine
-import de.kif.frontend.views.table.WorkGroupTableLine
 import de.westermann.kwebview.components.InputView
 import org.w3c.dom.HTMLFormElement
 import org.w3c.dom.HTMLInputElement

src/jsMain/kotlin/de/westermann/kwebview/components/Link.kt

@@ -11,7 +11,11 @@ import org.w3c.dom.HTMLAnchorElement
  *
  * @author lars
  */
-class Link(target: String) : ViewCollection<View>(createHtmlView<HTMLAnchorElement>("a")) {
+class Link(view: HTMLAnchorElement = createHtmlView()) : View(view) {
+
+    constructor(target: String, view: HTMLAnchorElement = createHtmlView()): this(view) {
+        this.target = target
+    }
 
     override val html = super.html as HTMLAnchorElement
 
@@ -27,8 +31,8 @@ class Link(target: String) : ViewCollection<View>(createHtmlView<HTMLAnchorEleme
             html.href = value
         }
 
-    init {
-        this.target = target
+    companion object {
+        fun wrap(view: HTMLAnchorElement) = Link(view)
     }
 }
 

src/jsMain/resources/style/style.scss

@@ -1036,6 +1036,7 @@ form {
 .overview-post {
   max-height: 20rem;
   overflow: hidden;
+  margin-bottom: 1rem;
 
   &::after {
     content: '';

src/jvmMain/kotlin/de/kif/backend/Application.kt

@@ -56,6 +56,7 @@ fun Application.main() {
         userApi()
         workGroupApi()
         constraintsApi()
+        postApi()
 
         // Web socket push notifications
         pushService()

src/jvmMain/kotlin/de/kif/backend/route/Overview.kt

@@ -20,6 +20,29 @@ import io.ktor.routing.post
 import io.ktor.util.toMap
 import kotlinx.html.*
 
+fun DIV.createPost(post: Post, editable: Boolean = false, additionalClasses: String = "") {
+    var classes = "post"
+    if (additionalClasses.isNotBlank()) {
+        classes += " $additionalClasses"
+    }
+    div(classes) {
+        attributes["data-id"] = post.id.toString()
+        a("/p/${post.url}", classes = "post-name") {
+            +post.name
+        }
+        if (editable) {
+            a("/post/${post.id}", classes = "post-edit") {
+                i("material-icons") { +"edit" }
+            }
+        }
+        div("post-content") {
+            unsafe {
+                raw(markdownToHtml(post.content))
+            }
+        }
+    }
+}
+
 fun Route.overview() {
     get("") {
         val user = isAuthenticated(Permission.POST)
@@ -44,21 +67,7 @@ fun Route.overview() {
                         }
 
                         for (post in postList) {
-                            div("overview-post post") {
-                                a("/p/${post.url}", classes="post-name") {
-                                    +post.name
-                                }
-                                if (editable) {
-                                    a("/post/${post.id}", classes = "post-edit") {
-                                        i("material-icons") { +"edit" }
-                                    }
-                                }
-                                div("post-content") {
-                                    unsafe {
-                                        raw(markdownToHtml(post.content))
-                                    }
-                                }
-                            }
+                            createPost(post, editable, "overview-post")
                         }
                     }
                     div("overview-side") {
@@ -109,22 +118,8 @@ fun Route.overview() {
             }
             content {
                 div("overview") {
-                            div("post") {
-                                span("post-name") {
-                                    +post.name
-                                }
-                                if (editable) {
-                                    a("/post/${post.id}", classes = "post-edit") {
-                                        i("material-icons") { +"edit" }
-                                    }
-                                }
-                                div("post-content") {
-                                    unsafe {
-                                        raw(markdownToHtml(post.content))
-                                    }
-                                }
-                            }
-                    }
+                    createPost(post, editable)
+                }
             }
         }
     }

src/jvmMain/kotlin/de/kif/backend/route/api/Post.kt

@@ -0,0 +1,115 @@
+package de.kif.backend.route.api
+
+import de.kif.backend.authenticate
+import de.kif.backend.repository.PostRepository
+import de.kif.backend.util.markdownToHtml
+import de.kif.common.model.Permission
+import de.kif.common.model.Post
+import io.ktor.application.call
+import io.ktor.html.respondHtml
+import io.ktor.http.HttpStatusCode
+import io.ktor.request.receive
+import io.ktor.response.respond
+import io.ktor.routing.Route
+import io.ktor.routing.get
+import io.ktor.routing.post
+import kotlinx.html.unsafe
+
+fun Route.postApi() {
+    get("/api/posts") {
+        try {
+            val posts = PostRepository.all()
+            call.success(posts)
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+
+    post("/api/posts") {
+        try {
+            authenticate(Permission.POST) {
+                val post = call.receive<Post>()
+
+                val id = PostRepository.create(post)
+
+                call.success(mapOf("id" to id))
+            } onFailure {
+                call.error(HttpStatusCode.Unauthorized)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+
+    get("/api/post/{id}") {
+        try {
+            val id = call.parameters["id"]?.toLongOrNull()
+            val post = id?.let { PostRepository.get(it) }
+
+            if (post != null) {
+                call.success(post)
+            } else {
+                call.error(HttpStatusCode.NotFound)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+
+    post("/api/post/{id}") {
+        try {
+            authenticate {
+                val id = call.parameters["id"]?.toLongOrNull()
+                val post = call.receive<Post>().copy(id = id)
+
+                if (post.id != null) {
+                    PostRepository.update(post)
+                    call.success()
+                } else {
+                    call.error(HttpStatusCode.NotFound)
+                }
+            } onFailure {
+                call.error(HttpStatusCode.Unauthorized)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+    post("/api/post/{id}/delete") {
+        try {
+            authenticate {
+                val id = call.parameters["id"]?.toLongOrNull()
+
+                if (id != null) {
+                    PostRepository.delete(id)
+                    call.success()
+                } else {
+                    call.error(HttpStatusCode.NotFound)
+                }
+            } onFailure {
+                call.error(HttpStatusCode.Unauthorized)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+
+    get("/api/p/{url}") {
+        try {
+            val id = call.parameters["url"]
+            val post = id?.let { PostRepository.getByUrl(it) }
+
+            if (post != null) {
+                call.respondHtml(HttpStatusCode.OK) {
+                    unsafe {
+                        raw(markdownToHtml(post.content))
+                    }
+                }
+            } else {
+                call.error(HttpStatusCode.NotFound)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
+}