feat: add get_all_tags_for_entry method

src/controllers/TagsController.js

@@ -1,18 +1,30 @@
 export default class TagsController {
-	tagsService
+    tagsService
 
-	constructor(tagsService) {
-		this.tagsService = tagsService
-	}
+    constructor(tagsService) {
+        this.tagsService = tagsService
+    }
 
-	getAllTags = (req, res) => {
-		const tags = this.tagsService.getAllTags()
-		if (!tags) {
-			return res.status(404).json({
-				message: `Tags list could not be retrieved`,
-			})
-		}
+    getAllTags = (req, res) => {
+        const tags = this.tagsService.getAllTags()
+        if (!tags) {
+            return res.status(404).json({
+                message: `Tags list could not be retrieved`,
+            })
+        }
 
-		return res.json(tags)
-	}
+        return res.json(tags)
+    }
+
+    getTagsForEntry = (req, res) => {
+        const entryTitle = req.params.entryTitle
+        const entries = this.tagsService.getTagsForEntry(entryTitle)
+        if (!entries) {
+            return res.status(404).json({
+                message: `Tag list could not be retrieved for entry ${entryTitle}`,
+            })
+        }
+
+        return res.json(entries)
+    }
 }

src/routes/tags.js

@@ -8,5 +8,6 @@ const tagsService = new TagsService(database)
 const tagsController = new TagsController(tagsService)
 
 router.get("/", tagsController.getAllTags)
+router.get("/:entryTitle", tagsController.getTagsForEntry)
 
 export default router

src/services/TagsService.js

@@ -1,4 +1,4 @@
-import { GET_ALL_TAGS } from "../sql/tags.js"
+import { GET_ALL_TAGS, GET_TAGS_FOR_ENTRY } from "../sql/tags.js"
 
 export default class TagsService {
     database
@@ -8,11 +8,20 @@ export default class TagsService {
     }
 
     getAllTags = () => {
-        const tags = this._sortTags(this.database.prepare(GET_ALL_TAGS).all()).flatMap((tag) => tag.name)
-        return { count: tags.length, tags: tags }
+        const tags = this.database.prepare(GET_ALL_TAGS).all()
+        const sorted = this._sortTags(tags, "name")
+        const list = sorted.flatMap((tag) => tag.name)
+        return { count: tags.length, tags: list }
     }
 
-    _sortTags = (tags) => {
-        return tags.sort((a, b) => a.name.localeCompare(b.name))
+    getTagsForEntry = (entryTitle) => {
+        const tags = this.database.prepare(GET_TAGS_FOR_ENTRY).all(entryTitle)
+        const sorted = this._sortTags(tags, "tag_name")
+        const list = sorted.flatMap((tag) => tag.tag_name)
+        return { count: tags.length, tags: list }
+    }
+
+    _sortTags = (tags, fieldName) => {
+        return tags.sort((a, b) => a[fieldName].localeCompare(b[fieldName]))
     }
 }

src/sql/tags.js

@@ -1,3 +1,5 @@
 const GET_ALL_TAGS = `SELECT name FROM tags`
 
-export { GET_ALL_TAGS }
+const GET_TAGS_FOR_ENTRY = `SELECT tag_name FROM entries_tags WHERE entry_title = ?`
+
+export { GET_ALL_TAGS, GET_TAGS_FOR_ENTRY }