1 files changed, 23 insertions, 1 deletions
diff --git a/asset-sources/fietsboek.ts b/asset-sources/fietsboek.ts
index 1cadfc2..b885271 100644
--- a/asset-sources/fietsboek.ts
+++ b/asset-sources/fietsboek.ts
@@ -138,6 +138,23 @@ function checkNameValidity(name: Selector) {
 checkNameValidity;
 
 /**
+ * Check whether the given friend is already tagged.
+ *
+ * Note that this uses the "HTML list", so it uses the tags that the user is
+ * currently editing - not the ones from the database!
+ *
+ * @param friendId - ID of the friend to check.
+ * @return Whether the friend is in the list of tagged people.
+ */
+function friendIsTagged(friendId: number): boolean {
+    return Array.from(document.querySelectorAll("[name='tagged-friend[]']"))
+        .map((obj) => obj as HTMLInputElement)
+        .filter((obj) => !obj.disabled)
+        .map((obj) => obj.value)
+        .includes(friendId.toString());
+}
+
+/**
  * Hit the endpoint to search for friends. This populates the friend selector
  * when tagging friends.
  */
@@ -152,10 +169,15 @@ function searchFriends() {
             const blueprint = document.querySelector("#friendSearchBlueprint") as HTMLLIElement;
 
             // Only show friends with a matching name
-            const friends = response.filter(
+            let friends = response.filter(
                 (obj) => obj.name.toLowerCase().indexOf(searchPattern) != -1
             );
 
+            // Only show friends that are not yet existing
+            friends = friends.filter(
+                (obj) => !friendIsTagged(obj.id)
+            );
+
             friends.forEach((friend) => {
                 const copy = blueprint.cloneNode(true) as HTMLLIElement;
                 copy.removeAttribute("id");