[Bug] fixed tags deletion (#128)

* fixed tags deletion not working when links are deleted and that tag has only one link

* fix

---------

Co-authored-by: anas shikoh <[email protected]>

Author: Mutant-Slayer

app/src/main/java/com/yogeshpaliyal/deepr/viewmodel/AccountViewModel.kt

@@ -230,8 +230,20 @@ class AccountViewModel(
 
     fun deleteAccount(id: Long) {
         viewModelScope.launch(Dispatchers.IO) {
+            val tagsToDelete = mutableListOf<Long>()
+
+            deeprQueries.getTagsForLink(id).executeAsList().forEach { tag ->
+                val linkCount = deeprQueries.hasTagLinks(tag.id).executeAsOne()
+                if (linkCount == 1L) {
+                    tagsToDelete.add(tag.id)
+                }
+            }
+
             deeprQueries.deleteDeeprById(id)
             deeprQueries.deleteLinkRelations(id)
+            tagsToDelete.forEach { tagId ->
+                deeprQueries.deleteTag(tagId)
+            }
         }
     }
 

app/src/main/sqldelight/com/yogeshpaliyal/deepr/Deepr.sq

@@ -116,4 +116,8 @@ DELETE FROM LinkTags WHERE tagId = ?;
 updateTag:
 UPDATE Tags SET name = ? WHERE id = ?;
 
+getTagsForLink:
+SELECT Tags.id,Tags.name FROM Tags INNER JOIN LinkTags ON Tags.id = LinkTags.tagId WHERE LinkTags.linkId = ? ORDER BY Tags.name;
 
+hasTagLinks:
+SELECT COUNT(*) FROM LinkTags WHERE tagId = ?;