feat: add get_all_entries_for_tag method

src/controllers/EntriesController.js

@@ -28,4 +28,16 @@ export default class EntriesController {
 
         return res.json(entries)
     }
+
+    getEntriesForTag = (req, res) => {
+        const tag = req.params.tag
+        const sort = req.query.sort
+        const entries = this.entriesService.getEntriesForTag(tag, sort)
+        if (!entries) {
+            return res.status(404).json({
+                message: `Could not retrieve entries for tag ${tag}`,
+            })
+        }
+        return res.json(entries)
+    }
 }

src/routes/entries.js

@@ -9,5 +9,5 @@ const entriesController = new EntriesController(entriesService)
 
 router.get("/", entriesController.getAllEntries)
 router.get("/:title", entriesController.getEntry)
-
+router.get("/tag/:tag", entriesController.getEntriesForTag)
 export default router

src/services/EntriesService.js

@@ -1,5 +1,5 @@
 import { sortByDate, sortByTitle } from "../lib/sorters.js"
-import { GET_ALL_ENTRIES, GET_ENTRY } from "../sql/entries.js"
+import { GET_ALL_ENTRIES, GET_ENTRY, GET_ENTRIES_FOR_TAG } from "../sql/entries.js"
 
 export default class EntriesService {
     database
@@ -23,4 +23,20 @@ export default class EntriesService {
             entries: sort === "date" ? sortByDate(entries) : sortByTitle(entries),
         }
     }
+
+    getEntriesForTag = (tag, sort) => {
+        const entries = this.database.prepare(GET_ENTRIES_FOR_TAG).all(tag)
+        return {
+            count: entries.length,
+            entries: sort === "date" ? this._sortByDate(entries) : this._sortByTitle(entries, "entry_title"),
+        }
+    }
+
+    _sortByTitle = (entries, fieldName) => {
+        return entries.sort((a, b) => a[fieldName].localeCompare(b[fieldName]))
+    }
+
+    _sortByDate = (entries, fieldName = last_modified) => {
+        return entries.sort((a, b) => new Date(b[fieldName]) - new Date(a[fieldName]))
+    }
 }

src/sql/entries.js

@@ -2,4 +2,6 @@ const GET_ENTRY = `SELECT * FROM entries WHERE title = ?`
 
 const GET_ALL_ENTRIES = `SELECT title, last_modified FROM entries`
 
-export { GET_ENTRY, GET_ALL_ENTRIES }
+const GET_ENTRIES_FOR_TAG = `SELECT entry_title from entries_tags WHERE tag_name = ?`
+
+export { GET_ENTRY, GET_ALL_ENTRIES, GET_ENTRIES_FOR_TAG }