From d7f4a9c2995a415dd64375c5711070c43b26e8ef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Kucharczyk?= <lukas@kucharczyk.xyz>
Date: Wed, 16 Nov 2022 09:35:49 +0100
Subject: [PATCH] Check if tags exist when tagging

---
 tag.sh | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/tag.sh b/tag.sh
index 05e4979..0db0f28 100755
--- a/tag.sh
+++ b/tag.sh
@@ -13,7 +13,6 @@ set -ueo pipefail
 #   - tag $FILENAME $TAG - tag $FILENAME with $TAG, $TAG can be repeated
 #   - listtags $FILENAME - list all tags for $FILENAME
 
-# TODO: when tagging, check if tags exist
 # TODO: when tagging, allow more than one tag
 # FIXME: adding tags doesn't work
 
@@ -165,6 +164,17 @@ add_path_auto() {
     find "${2}" -type f -regextype posix-extended -iregex "$1" -exec "$0" import "{}" +
 }
 
+tag_exists_in_db() {
+    # $TAGLABEL
+    TAG=${1:-}
+    RESULT=$(sqlite_query "SELECT id FROM tags WHERE label = '$TAG'")
+    if [[ -z "$RESULT" ]]; then
+        return 1
+    else
+        return 0
+    fi
+}
+
 main() {
 
     [ -z "${1:-}" ] && fail "Usage: tag init/add/import/autoimport/list/listtags"
@@ -212,10 +222,11 @@ main() {
         [ -z "$1" ] && fail "No filename supplied."
         FILENAME="$1"
         shift
-        [ -z "$1" ] && fail "No tag supplied."
+        [ -z "${1:-}" ] && fail "No tag supplied."
         COUNTER=0
         while true; do
             LABEL="$1"
+            ! tag_exists_in_db "$LABEL" && fail "Tag '$TAG' does not exist in database."
             shift
             sqlite3 -table "$DB_FILE" "INSERT INTO tags_ties (id, id) VALUES ((SELECT id FROM files WHERE filename = \"$FILENAME\"),(SELECT id FROM tags WHERE label = \"$LABEL\"))"
             COUNTER=$((COUNTER++))