From 26fdc13a77d92a914ea1361e580c1910f5c70874 Mon Sep 17 00:00:00 2001
From: Josha von Gizycki <josha.von.gizycki@iserv.eu>
Date: Tue, 29 Jul 2025 11:28:42 +0200
Subject: [PATCH] assign tags

---
 .../domain/event/AssignTaggingCommand.kt      | 15 +++++++++
 .../domain/handler/AssignTaggingHandler.kt    | 22 +++++++++++++
 src/main/kotlin/wanijo/wanijo2/domain/tag.kt  |  5 +++
 .../wanijo2/http/controller/ShowController.kt |  5 ++-
 .../http/controller/TaggingController.kt      | 33 ++++++++++---------
 src/main/resources/static/stylesheet.css      | 16 ++++-----
 src/main/resources/templates/show.html        | 16 +++++++--
 7 files changed, 84 insertions(+), 28 deletions(-)
 create mode 100644 src/main/kotlin/wanijo/wanijo2/domain/event/AssignTaggingCommand.kt
 create mode 100644 src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt

diff --git a/src/main/kotlin/wanijo/wanijo2/domain/event/AssignTaggingCommand.kt b/src/main/kotlin/wanijo/wanijo2/domain/event/AssignTaggingCommand.kt
new file mode 100644
index 0000000..cb1edc0
--- /dev/null
+++ b/src/main/kotlin/wanijo/wanijo2/domain/event/AssignTaggingCommand.kt
@@ -0,0 +1,15 @@
+package wanijo.wanijo2.domain.event
+
+import jakarta.validation.constraints.Min
+import jakarta.validation.constraints.NotEmpty
+import wanijo.wanijo2.domain.DocumentId
+import wanijo.wanijo2.domain.TagId
+
+data class AssignTaggingCommand(
+    @NotEmpty
+    @Min(1)
+    val tagId: TagId,
+    @NotEmpty
+    @Min(1)
+    val documentId: DocumentId
+)
diff --git a/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt b/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt
new file mode 100644
index 0000000..f3b154d
--- /dev/null
+++ b/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt
@@ -0,0 +1,22 @@
+package wanijo.wanijo2.domain.handler
+
+import org.springframework.stereotype.Service
+import wanijo.wanijo2.domain.DocumentTagging
+import wanijo.wanijo2.domain.DocumentTaggingDao
+import wanijo.wanijo2.domain.event.AssignTaggingCommand
+
+@Service
+class AssignTaggingHandler(
+    val taggingDao: DocumentTaggingDao
+) {
+
+    fun exec(command: AssignTaggingCommand) {
+        taggingDao.save(
+            DocumentTagging.between(
+                command.documentId,
+                command.tagId
+            )
+        )
+    }
+
+}
diff --git a/src/main/kotlin/wanijo/wanijo2/domain/tag.kt b/src/main/kotlin/wanijo/wanijo2/domain/tag.kt
index 1321c22..371c380 100644
--- a/src/main/kotlin/wanijo/wanijo2/domain/tag.kt
+++ b/src/main/kotlin/wanijo/wanijo2/domain/tag.kt
@@ -33,6 +33,11 @@ data class DocumentTagging(
                 tagId = AggregateReference.to(tagId),
                 documentId = AggregateReference.to(doc.id)
             )
+        fun between(docId: DocumentId, tagId: TagId) =
+            DocumentTagging(
+                tagId = AggregateReference.to(tagId),
+                documentId = AggregateReference.to(docId)
+            )
     }
 }
 
diff --git a/src/main/kotlin/wanijo/wanijo2/http/controller/ShowController.kt b/src/main/kotlin/wanijo/wanijo2/http/controller/ShowController.kt
index b384188..a1c770c 100644
--- a/src/main/kotlin/wanijo/wanijo2/http/controller/ShowController.kt
+++ b/src/main/kotlin/wanijo/wanijo2/http/controller/ShowController.kt
@@ -25,13 +25,16 @@ class ShowController(
         val document = docDao.findById(id) ?: throw DocumentNotFound()
         model["document"] = document
 
-        model["tags"] = tagDao.ofDocument(id)
 
         val descHtml = Parser.builder().build().parse(document.description).let {
             HtmlRenderer.builder().build().render(it)
         }
         model["descHtml"] = descHtml
 
+        val documentTags = tagDao.ofDocument(id)
+        model["documentTags"] = documentTags.sortedBy { it.name.lowercase() }
+        model["assignableTags"] = (tagDao.findAll() - documentTags).sortedBy { it.name.lowercase() }
+
         return "show"
     }
 
diff --git a/src/main/kotlin/wanijo/wanijo2/http/controller/TaggingController.kt b/src/main/kotlin/wanijo/wanijo2/http/controller/TaggingController.kt
index 3d5199f..7ca8aa8 100644
--- a/src/main/kotlin/wanijo/wanijo2/http/controller/TaggingController.kt
+++ b/src/main/kotlin/wanijo/wanijo2/http/controller/TaggingController.kt
@@ -1,32 +1,35 @@
 package wanijo.wanijo2.http.controller
 
+import jakarta.validation.Valid
 import org.springframework.stereotype.Controller
 import org.springframework.web.bind.annotation.PostMapping
-import org.springframework.web.bind.annotation.RequestParam
-import wanijo.wanijo2.domain.DocumentId
-import wanijo.wanijo2.domain.TagId
+import wanijo.wanijo2.domain.event.AssignTaggingCommand
 import wanijo.wanijo2.domain.event.DeleteTaggingCommand
+import wanijo.wanijo2.domain.handler.AssignTaggingHandler
 import wanijo.wanijo2.domain.handler.DeleteTaggingHandler
 
 @Controller
 class TaggingController(
-    val deleteTaggingHandler: DeleteTaggingHandler
+    val deleteTaggingHandler: DeleteTaggingHandler,
+    val assignTaggingHandler: AssignTaggingHandler
 ) {
 
     @PostMapping("/tagging/delete")
     fun delete(
-        @RequestParam("docId")
-        documentId: DocumentId,
-        @RequestParam("tagId")
-        tagId: TagId
+        @Valid
+        command: DeleteTaggingCommand
     ): String {
-        deleteTaggingHandler.exec(
-            DeleteTaggingCommand(
-                tagId = tagId,
-                documentId = documentId
-            )
-        )
-        return "redirect:/document/${documentId}"
+        deleteTaggingHandler.exec(command)
+        return "redirect:/document/${command.documentId}"
+    }
+
+    @PostMapping("/tagging/assign")
+    fun assign(
+        @Valid
+        command: AssignTaggingCommand
+    ): String {
+        assignTaggingHandler.exec(command)
+        return "redirect:/document/${command.documentId}"
     }
 
 }
diff --git a/src/main/resources/static/stylesheet.css b/src/main/resources/static/stylesheet.css
index 0bc7bb2..95e398d 100644
--- a/src/main/resources/static/stylesheet.css
+++ b/src/main/resources/static/stylesheet.css
@@ -30,15 +30,13 @@ main {
         font-size: 90%;
     }
 
-    .show__tags {
-        ul {
-            list-style-type: none;
-            margin: 0;
-            padding: 0;
-
-            display: flex;
-            justify-content: space-evenly;
-        }
+    .tag-container {
+        list-style-type: none;
+        margin: 0;
+        padding: 0;
+
+        display: flex;
+        justify-content: space-evenly;
     }
 
     .tag-block {
diff --git a/src/main/resources/templates/show.html b/src/main/resources/templates/show.html
index 13486df..29664ed 100644
--- a/src/main/resources/templates/show.html
+++ b/src/main/resources/templates/show.html
@@ -33,12 +33,12 @@
             <fieldset class="show__tags">
                 <legend>tags</legend>
 
-                <ul>
-                    <li th:each="tag : ${tags}" class="tag-block">
+                <ul class="tag-container">
+                    <li th:each="tag : ${documentTags}" class="tag-block">
                         <th:block th:text="${tag.name}"/>
                         <form class="form-link" th:action="@{/tagging/delete}" method="post">
                             <input type="hidden" name="tagId" th:value="${tag.id}">
-                            <input type="hidden" name="docId" th:value="${document.id}">
+                            <input type="hidden" name="documentId" th:value="${document.id}">
                             <button type="submit">🞭</button>
                         </form>
                     </li>
@@ -51,6 +51,16 @@
             </fieldset>
 
             <h2 class="low-key-hint">taggen</h2>
+            <ul class="tag-container">
+                <li th:each="tag : ${assignableTags}" class="tag-block">
+                    <th:block th:text="${tag.name}"/>
+                    <form class="form-link" th:action="@{/tagging/assign}" method="post">
+                        <input type="hidden" name="tagId" th:value="${tag.id}">
+                        <input type="hidden" name="documentId" th:value="${document.id}">
+                        <button type="submit">⊕</button>
+                    </form>
+                </li>
+            </ul>
         </main>
     </body>
 </html>