Improves gdl.sh and images-indexer.sh scripts

scripts/shell/images-indexer.sh

@@ -20,7 +20,7 @@ if [ ${#commands_not_found[@]} -ne 0 ]; then
 fi
 
 cur_dir=`pwd`
-furry_commission_ideas_path=/mnt/e/home/Documents/sync/nextcloud-pudimxyz-cloud/furry-commission-ideas
+furry_commission_ideas_path=/mnt/e/home/sync/nextcloud/furry-commission-ideas
 furry_commission_ideas_urls_filename="urls.txt"
 scripts_path=/home/cloud/repos/personal-devboot/scripts/shell
 
@@ -47,6 +47,12 @@ done
 # remove trailing slashes
 media_url=`sed 's:/*$::' <<< "$media_url"`
 
+url_regex='(https?)://[-[:alnum:]\+&@#/%?=~_|!:,.;]*[-[:alnum:]\+&@#/%=~_|]'
+if [[ ! $media_url =~ $url_regex ]]; then
+    echo "The URL informed is not valid."
+    exit 1
+fi
+
 cd $furry_commission_ideas_path
 
 existing_folders=($(find * -type d -not -path artists -not -path kinks -not -path ideas))
@@ -130,7 +136,9 @@ if [ -f "$furry_commission_ideas_urls_filename" ] && grep -qE "$media_url" -i "$
     exit 0
 fi
 
-command_output=`$scripts_path/gdl.sh $media_url`
+if ! command_output=$($scripts_path/gdl.sh $media_url); then
+  exit 1
+fi
 
 media_filenames=()