Add function to delete a like

pkg/persistence/likes_queries.go

@@ -20,6 +20,14 @@ func (p Profile) SaveLike(l scraper.Like) error {
 	return nil
 }
 
+func (p Profile) DeleteLike(l scraper.Like) error {
+	_, err := p.DB.NamedExec(`delete from likes where user_id = :user_id and tweet_id = :tweet_id`, l)
+	if err != nil {
+		return fmt.Errorf("Error executing DeleteLike(%#v):\n  %w", l, err)
+	}
+	return nil
+}
+
 func (p Profile) GetLikeBySortID(id scraper.LikeSortID) (scraper.Like, error) {
 	var l scraper.Like
 	err := p.DB.Get(&l, `

pkg/persistence/likes_queries_test.go

@@ -36,3 +36,22 @@ func TestSaveAndLoadLike(t *testing.T) {
 		t.Error(diff)
 	}
 }
+
+func TestDeleteLike(t *testing.T) {
+	require := require.New(t)
+
+	profile_path := "test_profiles/TestLikesQueries"
+	profile := create_or_load_profile(profile_path)
+
+	like := create_dummy_like()
+	err := profile.SaveLike(like)
+	require.NoError(err)
+
+	// Delete it
+	err = profile.DeleteLike(like)
+	require.NoError(err)
+
+	// Should be gone
+	_, err = profile.GetLikeBySortID(like.SortID)
+	require.Error(err)
+}