Add persistent multi-tag include and exclude filters

internal/analytics/store.go

@@ -15,13 +15,14 @@ import (
 type Store struct{ db *sql.DB }
 
 type Filter struct {
-	From       string `json:"from"`
-	To         string `json:"to"`
-	Currency   string `json:"currency"`
-	AccountID  string `json:"account_id"`
-	CategoryID string `json:"category_id"`
-	TagID      string `json:"tag_id"`
-	MerchantID string `json:"merchant_id"`
+	From          string   `json:"from"`
+	To            string   `json:"to"`
+	Currency      string   `json:"currency"`
+	AccountID     string   `json:"account_id"`
+	CategoryID    string   `json:"category_id"`
+	TagIDs        []string `json:"tag_ids"`
+	ExcludeTagIDs []string `json:"exclude_tag_ids"`
+	MerchantID    string   `json:"merchant_id"`
 }
 
 type Total struct {
@@ -272,21 +273,18 @@ func (f Filter) where() (string, []any) {
 	add("t.account_id = ?", f.AccountID)
 	add("t.merchant_id = ?", f.MerchantID)
 	add("EXISTS (SELECT 1 FROM category_ancestors ca WHERE ca.category_id = t.category_id AND ca.ancestor_id = ?)", f.CategoryID)
-	if f.TagID != "" {
-		ids := strings.Split(f.TagID, ",")
-		placeholders := make([]string, 0, len(ids))
-		for _, id := range ids {
-			id = strings.TrimSpace(id)
-			if id != "" {
-				placeholders = append(placeholders, "?")
-				args = append(args, id)
-			}
+	addTags := func(predicate string, ids []string) {
+		if len(ids) == 0 {
+			return
 		}
-		if len(placeholders) == 0 {
-			clauses = append(clauses, "FALSE")
-		} else {
-			clauses = append(clauses, "EXISTS (SELECT 1 FROM transaction_tags tt WHERE tt.transaction_id = t.id AND tt.tag_id IN ("+strings.Join(placeholders, ",")+"))")
+		placeholders := make([]string, len(ids))
+		for i, id := range ids {
+			placeholders[i] = "?"
+			args = append(args, id)
 		}
+		clauses = append(clauses, predicate+" (SELECT 1 FROM transaction_tags tt WHERE tt.transaction_id = t.id AND tt.tag_id IN ("+strings.Join(placeholders, ",")+"))")
 	}
+	addTags("EXISTS", f.TagIDs)
+	addTags("NOT EXISTS", f.ExcludeTagIDs)
 	return strings.Join(clauses, " AND "), args
 }