Add live preview for posts

build.gradle

@@ -88,8 +88,6 @@ kotlin {
 
                 implementation "de.westermann:KObserve-jvm:$observable_version"
 
-                //api 'org.jetbrains:markdown:0.1.28'
-                //implementation 'com.atlassian.commonmark:commonmark:0.12.1'
                 implementation 'com.vladsch.flexmark:flexmark-all:0.42.10'
                 api 'io.github.microutils:kotlin-logging:1.6.23'
                 api 'ch.qos.logback:logback-classic:1.2.3'

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

@@ -4,6 +4,7 @@ import de.kif.frontend.views.calendar.initCalendar
 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.initPostEdit
 import de.kif.frontend.views.overview.initPosts
 import de.westermann.kwebview.components.init
 import kotlin.browser.document
@@ -26,4 +27,7 @@ fun main() = init {
     if (document.getElementsByClassName("post").length > 0) {
         initPosts()
     }
+    if (document.getElementsByClassName("post-edit-right").length > 0) {
+        initPostEdit()
+    }
 }

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

@@ -45,6 +45,10 @@ object PostRepository : Repository<Post> {
         return repositoryRawGet("/api/p/$url")
     }
 
+    suspend fun render(data: String): String {
+        return repositoryPost("/api/render", data)
+    }
+
     val handler = object : MessageHandler(RepositoryType.POST) {
 
         override fun onCreate(id: Long) = onCreate.emit(id)

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

@@ -1,8 +1,11 @@
 package de.kif.frontend.views.overview
 
 import de.kif.frontend.iterator
+import de.kif.frontend.launch
 import de.kif.frontend.repository.PostRepository
 import org.w3c.dom.HTMLElement
+import org.w3c.dom.HTMLTextAreaElement
+import org.w3c.dom.events.EventListener
 import org.w3c.dom.get
 import kotlin.browser.document
 
@@ -39,3 +42,23 @@ fun initPosts() {
         PostView(post)
     }
 }
+
+fun initPostEdit() {
+    val textArea = document.getElementById("content") as HTMLTextAreaElement
+    val preview = document.getElementsByClassName("post-edit-right")[0] as HTMLElement
+
+    textArea.addEventListener("change", EventListener {
+        launch {
+            preview.innerHTML = PostRepository.render(textArea.value)
+        }
+    })
+    textArea.addEventListener("keyup", EventListener {
+        launch {
+            preview.innerHTML = PostRepository.render(textArea.value)
+        }
+    })
+
+    launch {
+        preview.innerHTML = PostRepository.render(textArea.value)
+    }
+}

src/jsMain/resources/style/style.scss

@@ -1001,6 +1001,7 @@ form {
     color: $text-primary-color;
   }
 }
+
 .post-edit {
   position: absolute;
   top: 0;
@@ -1013,26 +1014,68 @@ form {
     margin: 0.7rem 0;
     padding: 0;
   }
+
   h1 {
     font-size: 1rem;
   }
+
   h2 {
     font-size: 1rem;
   }
+
   h3 {
     font-size: 1rem;
   }
+
   h4 {
     font-size: 1rem;
   }
+
   h5 {
     font-size: 1rem;
   }
+
   h6 {
     font-size: 1rem;
   }
+
+  table {
+    border-collapse: collapse;
+    border-spacing: 0;
   }
 
+  td {
+    border-top: solid 1px rgba($text-primary-color, 0.1);
+  }
+
+  th {
+    background-color: rgba($text-primary-color, 0.06);
+  }
+
+  td, th {
+    padding: 0.4rem;
+  }
+}
+
+.post-edit-container {
+  display: flex;
+  flex-direction: column;
+}
+
+.post-edit-right {
+  margin-left: 0;
+}
+
+@media (min-width: 768px) {
+  .post-edit-container {
+    flex-direction: row;
+  }
+  .post-edit-right {
+    margin-left: 2rem;
+  }
+}
+
+/*
 .overview-post {
   max-height: 20rem;
   overflow: hidden;
@@ -1048,3 +1091,4 @@ form {
     background: linear-gradient(0deg, $background-primary-color, transparent);
   }
 }
+ */

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

@@ -12,9 +12,7 @@ import io.ktor.http.content.static
 import io.ktor.jackson.jackson
 import io.ktor.routing.routing
 import io.ktor.websocket.WebSockets
-import kotlinx.serialization.ImplicitReflectionSerializer
 
-@ImplicitReflectionSerializer
 fun Application.main() {
     install(DefaultHeaders)
     install(CallLogging)

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

@@ -8,10 +8,8 @@ import io.ktor.application.Application
 import io.ktor.server.engine.embeddedServer
 import io.ktor.server.netty.Netty
 import kotlinx.coroutines.runBlocking
-import kotlinx.serialization.ImplicitReflectionSerializer
 
 object Main {
-    @ImplicitReflectionSerializer
     @Suppress("UnusedMainParameter")
     @JvmStatic
     fun main(args: Array<String>) {

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

@@ -136,6 +136,8 @@ fun Route.overview() {
                 }
                 content {
                     h1 { +"Edit post" }
+                    div("post-edit-container") {
+                        div("post-edit-left") {
                             form(method = FormMethod.post) {
                                 div("form-group") {
                                     label {
@@ -173,7 +175,7 @@ fun Route.overview() {
                                     }
                                     textArea(rows = "10", classes = "form-control") {
                                         name = "content"
-                                id = "projector"
+                                        id = "content"
 
                                         +editPost.content
                                     }
@@ -196,6 +198,11 @@ fun Route.overview() {
                                 }
                             }
                         }
+                        div("post-edit-right post-content") {
+
+                        }
+                    }
+                }
             }
         }
     }
@@ -227,6 +234,8 @@ fun Route.overview() {
                 }
                 content {
                     h1 { +"Create post" }
+                    div("post-edit-container") {
+                        div("post-edit-left") {
                             form(method = FormMethod.post) {
                                 div("form-group") {
                                     label {
@@ -264,7 +273,7 @@ fun Route.overview() {
                                     }
                                     textArea(rows = "10", classes = "form-control") {
                                         name = "content"
-                                id = "projector"
+                                        id = "content"
 
                                         +""
                                     }
@@ -282,6 +291,11 @@ fun Route.overview() {
                                 }
                             }
                         }
+                        div("post-edit-right post-content") {
+
+                        }
+                    }
+                }
             }
         }
     }

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

@@ -9,7 +9,7 @@ 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.request.receiveText
 import io.ktor.routing.Route
 import io.ktor.routing.get
 import io.ktor.routing.post
@@ -58,7 +58,7 @@ fun Route.postApi() {
 
     post("/api/post/{id}") {
         try {
-            authenticate {
+            authenticate(Permission.POST) {
                 val id = call.parameters["id"]?.toLongOrNull()
                 val post = call.receive<Post>().copy(id = id)
 
@@ -77,7 +77,7 @@ fun Route.postApi() {
     }
     post("/api/post/{id}/delete") {
         try {
-            authenticate {
+            authenticate(Permission.POST) {
                 val id = call.parameters["id"]?.toLongOrNull()
 
                 if (id != null) {
@@ -112,4 +112,18 @@ fun Route.postApi() {
             call.error(HttpStatusCode.InternalServerError)
         }
     }
+
+    post("/api/render") {
+        try {
+            authenticate(Permission.POST) {
+                val data = call.receiveText()
+                val html = markdownToHtml(data)
+                call.success(html)
+            } onFailure {
+                call.error(HttpStatusCode.Unauthorized)
+            }
+        } catch (_: Exception) {
+            call.error(HttpStatusCode.InternalServerError)
+        }
+    }
 }

src/jvmMain/kotlin/de/kif/backend/util/ParseMarkdown.kt

@@ -2,59 +2,51 @@ package de.kif.backend.util
 
 import com.vladsch.flexmark.ext.autolink.AutolinkExtension
 import com.vladsch.flexmark.ext.emoji.EmojiExtension
+import com.vladsch.flexmark.ext.emoji.EmojiImageType
 import com.vladsch.flexmark.ext.gfm.strikethrough.StrikethroughExtension
 import com.vladsch.flexmark.ext.gfm.tasklist.TaskListExtension
+import com.vladsch.flexmark.ext.gitlab.GitLabExtension
 import com.vladsch.flexmark.ext.tables.TablesExtension
-import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.ext.typographic.TypographicExtension
+import com.vladsch.flexmark.ext.youtube.embedded.YouTubeLinkExtension
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.options.MutableDataSet;
 import java.util.*
 
-/*
+object ParseMarkdown {
-import org.intellij.markdown.flavours.commonmark.CommonMarkFlavourDescriptor
-import org.intellij.markdown.html.HtmlGenerator
-import org.intellij.markdown.parser.MarkdownParser
 
-fun markdownToHtml(content: String): String {
+    private val parser: Parser
-    val flavour = CommonMarkFlavourDescriptor()
+    private val renderer: HtmlRenderer
-    val parsedTree = MarkdownParser(flavour).buildMarkdownTreeFromString(content)
-    val html = HtmlGenerator(content, parsedTree, flavour).generateHtml()
-    return html
-}
- */
-/*
-import org.commonmark.parser.Parser
-import org.commonmark.renderer.html.HtmlRenderer
 
-fun markdownToHtml(content: String): String {
+    fun parse(content: String): String {
-    val parser = Parser.builder().build()
+        val document = parser.parse(content) ?: return ""
-    val document = parser.parse(content)
+        return renderer.render(document) ?: ""
-    val renderer = HtmlRenderer.builder().build()
-    return renderer.render(document)
     }
 
- */
+    init {
-
-fun markdownToHtml(content: String): String {
         val options = MutableDataSet()
 
-    options.set(Parser.EXTENSIONS, Arrays.asList(
+        options.set(
+            Parser.EXTENSIONS, Arrays.asList(
                 TablesExtension.create(),
                 StrikethroughExtension.create(),
                 TaskListExtension.create(),
                 EmojiExtension.create(),
-        AutolinkExtension.create()
+                AutolinkExtension.create(),
-    ));
+                GitLabExtension.create(),
+                TypographicExtension.create(),
+                YouTubeLinkExtension.create()
+            )
+        )
+
+        options.set(EmojiExtension.USE_IMAGE_TYPE, EmojiImageType.UNICODE_ONLY)
 
         //options.set(HtmlRenderer.SOFT_BREAK, "<br />\n");
 
-    val parser = Parser.builder(options).build()
+        parser = Parser.builder(options).build()
-    val renderer = HtmlRenderer.builder(options).build()
+        renderer = HtmlRenderer.builder(options).build()
-
-    // You can re-use parser and renderer instances
-    val document = parser.parse(content)
-    val html = renderer.render(document)
-
-    return html
     }
+}
+
+fun markdownToHtml(content: String): String = ParseMarkdown.parse(content)