SendToChat now check links validity before adding them

system/scripts/helpers.js

@@ -527,10 +527,21 @@ export class HelpersL5r5e {
         let link = null;
         if (object.data.flags.core?.sourceId) {
             link = object.data.flags.core?.sourceId.replace(/(\w+)\.(.+)/, "@$1[$2]");
-        } else if (object.pack) {
+            if (!HelpersL5r5e.isLinkValid(link)) {
+                link = null;
+            }
+        }
+        if (!link && object.pack) {
             link = `@Compendium[${object.pack}.${object.id}]{${object.name}}`;
-        } else if (!object.actor) {
+            if (!HelpersL5r5e.isLinkValid(link)) {
+                link = null;
+            }
+        }
+        if (!link && !object.actor) {
             link = object.link;
+            if (!HelpersL5r5e.isLinkValid(link)) {
+                link = null;
+            }
         }
 
         // Send to Chat
@@ -539,6 +550,41 @@ export class HelpersL5r5e {
         });
     }
 
+    /**
+     * Check if the link is valid (format "@Item[L5RCoreIte000042]{Amigasa}" / "@Compendium[l5r5e.core-peculiarities-distinctions.L5RCoreDis000002]{Ambidextrie}")
+     * @param  {string} link
+     * @return {boolean}
+     */
+    static isLinkValid(link) {
+        const [type, target] = link.replace(/@(\w+)\[([^\]]+)\].*/, "$1|$2").split("|");
+
+        // Get a matched World document
+        // "@Item[L5RCoreIte000042]{Amigasa}"
+        if (CONST.ENTITY_TYPES.includes(type)) {
+            const collection = game.collections.get(type);
+            const document = /^[a-zA-Z0-9]{16}$/.test(target) ? collection.get(target) : collection.getName(target);
+            return !!document;
+        }
+
+        // Get a matched Compendium entity
+        // "@Compendium[l5r5e.core-peculiarities-distinctions.L5RCoreDis000002]{Ambidextrie}"
+        if (type === "Compendium") {
+            // Get the linked Entity
+            const [scope, packName, id] = target.split(".");
+            const pack = game.packs.get(`${scope}.${packName}`);
+            if (!pack) {
+                return false;
+            }
+            // If the pack is indexed, check, if not assume it's ok
+            if (pack.index.size) {
+                const index = pack.index.find((i) => i._id === id || i.name === id);
+                return !!index;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * Return the RollMode for this ChatData
      * @param  {object} chatData