draft for links

src/main/kotlin/wanijo/wanijo2/domain/event/AddLinkCommand.kt

@@ -0,0 +1,13 @@
+package wanijo.wanijo2.domain.event
+
+import jakarta.validation.constraints.Min
+import wanijo.wanijo2.domain.Direction
+import wanijo.wanijo2.domain.DocumentId
+
+data class AddLinkCommand(
+    @Min(1)
+    val documentId: DocumentId,
+    @Min.List(Min(1))
+    val otherDocuments: List<DocumentId>,
+    val direction: Direction
+)

src/main/kotlin/wanijo/wanijo2/domain/link.kt

@@ -0,0 +1,25 @@
+package wanijo.wanijo2.domain
+
+import org.springframework.data.annotation.Id
+import org.springframework.data.jdbc.core.mapping.AggregateReference
+import org.springframework.data.relational.core.mapping.Table
+import org.springframework.data.repository.Repository
+import java.time.Instant
+
+typealias LinkId = Long
+
+@Table("T_LINK")
+data class Link(
+    @Id
+    val id: LinkId = 0,
+    val from: AggregateReference<Document, DocumentId>,
+    val to: AggregateReference<Document, DocumentId>,
+    val createdAt: Instant = Instant.now(),
+)
+
+enum class Direction {
+    OUTGOING,
+    INCOMING
+}
+
+interface LinkDao : Repository<Link, LinkId> {}

src/main/kotlin/wanijo/wanijo2/http/controller/AddFieldController.kt

@@ -14,7 +14,6 @@ import wanijo.wanijo2.domain.event.AddLabelFieldCommand
 import wanijo.wanijo2.domain.handler.AddDateFieldHandler
 import wanijo.wanijo2.domain.handler.AddLabelFieldHandler
 import java.time.LocalDateTime
-import java.time.ZonedDateTime.now
 
 @Controller
 class AddFieldController(

src/main/kotlin/wanijo/wanijo2/http/controller/LinkController.kt

@@ -0,0 +1,48 @@
+package wanijo.wanijo2.http.controller
+
+import org.springframework.data.domain.Sort
+import org.springframework.stereotype.Controller
+import org.springframework.ui.Model
+import org.springframework.ui.set
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import wanijo.wanijo2.domain.Direction
+import wanijo.wanijo2.domain.DocumentBriefDao
+import wanijo.wanijo2.domain.DocumentId
+import wanijo.wanijo2.domain.event.AddLinkCommand
+
+@Controller
+class LinkController(
+    val documentBriefDao: DocumentBriefDao,
+) {
+
+    @GetMapping("/document/{id}/link/add")
+    fun addLabel(
+        @PathVariable
+        id: DocumentId,
+        model: Model
+    ): String {
+        model["document"] = documentBriefDao.findById(id)
+        model["documents"] = documentBriefDao.findAll(Sort.by(Sort.Direction.ASC, "name"))
+
+        model["addForm"] = AddLinkCommand(
+            id,
+            emptyList(),
+            Direction.OUTGOING
+        )
+
+        return "addLink"
+    }
+
+    /*@PostMapping("/document/{id}/field/label/add")
+    fun addLabel(
+        @PathVariable
+        id: DocumentId,
+        @Valid
+        command: AddLabelFieldCommand
+    ): String {
+        addLabelFieldHandler.exec(command)
+        return "redirect:/document/$id"
+    }*/
+
+}

src/main/kotlin/wanijo/wanijo2/http/controller/ShowController.kt

@@ -9,12 +9,15 @@ import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PathVariable
 import wanijo.wanijo2.domain.DocumentDao
 import wanijo.wanijo2.domain.DocumentId
+import wanijo.wanijo2.domain.Link
+import wanijo.wanijo2.domain.LinkDao
 import wanijo.wanijo2.domain.TagDao
 import wanijo.wanijo2.http.DocumentNotFound
 
 @Controller
 class ShowController(
     val docDao: DocumentDao,
+    val linkDao: LinkDao,
     val tagDao: TagDao
 ) {
 
@@ -36,6 +39,9 @@ class ShowController(
         model["documentTags"] = documentTags.sortedBy { it.name.lowercase() }
         model["assignableTags"] = (tagDao.findAll() - documentTags).sortedBy { it.name.lowercase() }
 
+        model["incomingLinks"] = emptyList<Link>()
+        model["outgoingLinks"] = emptyList<Link>()
+
         return "show"
     }
 

src/main/resources/db/migration/V202512241340__links.sql

@@ -0,0 +1,15 @@
+CREATE TABLE t_link
+(
+    id            INT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+    document_from INT                      NOT NULL,
+    document_to   INT                      NOT NULL,
+    created_at    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+
+    CONSTRAINT fk_link_document_from
+        FOREIGN KEY (document_from)
+            REFERENCES t_document (id),
+
+    CONSTRAINT fk_link_document_to
+        FOREIGN KEY (document_to)
+            REFERENCES t_document (id)
+);

src/main/resources/templates/addLabelField.html

@@ -11,7 +11,7 @@
             <a th:href="@{/document/{id}(id=${document.id})}">&lt;&lt; zurück</a>
 
             <h2>
-                <span class="low-key-hint">label zu</span>
+                <span class="low-key-hint">beschriftung zu</span>
                 <th:block th:text="${document.name}"/>
                 <span class="low-key-hint">hinzufügen</span>
             </h2>

src/main/resources/templates/addLink.html

@@ -0,0 +1,41 @@
+<!doctype html>
+<html xmlns:th="http://www.thymeleaf.org"
+      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
+      layout:decorate="~{base}"
+      lang="">
+    <head>
+        <title th:text="${document.name}"></title>
+    </head>
+    <body>
+        <main id="content" layout:fragment="content">
+            <a th:href="@{/document/{id}(id=${document.id})}">&lt;&lt; zurück</a>
+
+            <h2>
+                <span class="low-key-hint">verknüpfung für</span>
+                <th:block th:text="${document.name}"/>
+                <span class="low-key-hint">hinzufügen</span>
+            </h2>
+
+            <form th:action="@{/document/{id}/link/add(id=${document.id})}"
+                  th:object="${addForm}"
+                  method="post">
+                <input type="hidden" th:field="*{documentId}">
+
+                <label for="otherDocuments">dokumente</label>
+                <select th:field="*{otherDocuments}" multiple id="otherDocuments">
+                    <option th:each="doc: ${documents}"
+                            th:value="${doc.id}"
+                            th:if="${doc.id != document.id}"
+                            th:text="${doc.name}"></option>
+                </select>
+
+                <button type="submit" value="OUTGOING" name="direction">
+                    ausgehend
+                </button>
+                <button type="submit" value="INCOMING" name="direction">
+                    eingehend
+                </button>
+            </form>
+        </main>
+    </body>
+</html>

src/main/resources/templates/edit.html

@@ -8,6 +8,14 @@
     </head>
     <body>
         <main id="content" layout:fragment="content">
+            <a th:href="@{/document/{id}(id=${form.id})}">&lt;&lt; zurück</a>
+
+            <h2>
+                <span class="low-key-hint">dokument</span>
+                <th:block th:text="${form.name}"/>
+                <span class="low-key-hint">bearbeiten</span>
+            </h2>
+
             <form th:action="@{/document/edit}" th:object="${form}" method="post">
                 <input type="hidden" th:field="*{id}">
 

src/main/resources/templates/show.html

@@ -53,6 +53,33 @@
                 <div class="show__markdown" th:utext="${descHtml}"></div>
             </fieldset>
 
+            <h2 class="low-key-hint">
+                verknüpfungen
+                <a th:href="@{/document/{id}/link/add(id=${document.id})}">
+                    <button>
+                        neu
+                    </button>
+                </a>
+            </h2>
+            <h3 class="low-key-hint">
+                eingehend
+            </h3>
+            <ol>
+                <li th:each="link : ${incomingLinks}">
+                    <a th:href="@{/document/{id}(id=${link.documentFrom})}"
+                       th:text="link.documentFrom"></a>
+                </li>
+            </ol>
+            <h3 class="low-key-hint">
+                ausgehend
+            </h3>
+            <ol>
+                <li th:each="link : ${outgoingLinks}">
+                    <a th:href="@{/document/{id}(id=${link.documentTo})}"
+                       th:text="link.documentFrom"></a>
+                </li>
+            </ol>
+
             <h2 class="low-key-hint">
                 felder
                 <a th:href="@{/document/{id}/field/add(id=${document.id})}">
@@ -62,7 +89,7 @@
                 </a>
             </h2>
             <h3 class="low-key-hint">
-                label
+                beschriftung
             </h3>
             <dl>
                 <th:block th:each="field : ${document.labelFieldsSorted()}">