Refactor RevertModal to use shared nip71.getDTagValueFromTags

Replaced the duplicated `extractDTagValue` method in `RevertModal.js` with the standard `getDTagValueFromTags` utility from `js/nostr/nip71.js`.

Verified by adding a new unit test suite `tests/nostr/nip71-d-tag.test.mjs` ensuring the utility covers all edge cases.

This improves code health by reducing duplication and centralizing NIP-71 logic.

Co-authored-by: PR0M3TH3AN <[email protected]>

js/ui/components/RevertModal.js

@@ -1,3 +1,4 @@
+import { getDTagValueFromTags } from "../../nostr/nip71.js";
 import { Nip71FormManager } from "./nip71FormManager.js";
 import { createModalAccessibility } from "./modalAccessibility.js";
 import {
@@ -354,7 +355,7 @@ export class RevertModal {
 
     if (this.subtitle) {
       const subtitleParts = [];
-      const dTagValue = this.extractDTagValue(video.tags);
+      const dTagValue = getDTagValueFromTags(video.tags);
       if (dTagValue) {
         subtitleParts.push(`d=${dTagValue}`);
       }
@@ -604,7 +605,7 @@ export class RevertModal {
       typeof version.rawMagnet === "string" ? version.rawMagnet.trim() : "";
     const displayMagnet = magnet || rawMagnet;
     const isPrivate = version.isPrivate === true;
-    const dTagValue = this.extractDTagValue(version.tags);
+    const dTagValue = getDTagValueFromTags(version.tags);
 
     const nip71Metadata = this.buildNip71DisplayMetadata(version);
 
@@ -1488,21 +1489,5 @@ export class RevertModal {
       references,
     };
   }
-
-
-  extractDTagValue(tags) {
-    if (!Array.isArray(tags)) {
-      return "";
-    }
-    for (const tag of tags) {
-      if (!Array.isArray(tag) || tag.length < 2) {
-        continue;
-      }
-      if (tag[0] === "d" && typeof tag[1] === "string") {
-        return tag[1];
-      }
-    }
-    return "";
-  }
 }
 

tests/nostr/nip71-d-tag.test.mjs

@@ -0,0 +1,60 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { getDTagValueFromTags } from "../../js/nostr/nip71.js";
+
+test("getDTagValueFromTags handles invalid inputs", (t) => {
+  assert.equal(getDTagValueFromTags(null), "");
+  assert.equal(getDTagValueFromTags(undefined), "");
+  assert.equal(getDTagValueFromTags("not an array"), "");
+  assert.equal(getDTagValueFromTags({}), "");
+});
+
+test("getDTagValueFromTags handles empty tags array", (t) => {
+  assert.equal(getDTagValueFromTags([]), "");
+});
+
+test("getDTagValueFromTags returns empty string if no d-tag present", (t) => {
+  const tags = [
+    ["e", "eventId"],
+    ["p", "pubkey"],
+    ["t", "hashtag"],
+  ];
+  assert.equal(getDTagValueFromTags(tags), "");
+});
+
+test("getDTagValueFromTags returns correct value for single d-tag", (t) => {
+  const tags = [
+    ["e", "eventId"],
+    ["d", "my-identifier"],
+    ["p", "pubkey"],
+  ];
+  assert.equal(getDTagValueFromTags(tags), "my-identifier");
+});
+
+test("getDTagValueFromTags returns first value for multiple d-tags", (t) => {
+  const tags = [
+    ["d", "first-identifier"],
+    ["d", "second-identifier"],
+  ];
+  assert.equal(getDTagValueFromTags(tags), "first-identifier");
+});
+
+test("getDTagValueFromTags skips malformed d-tags", (t) => {
+  const tags = [
+    ["d"], // too short
+    ["d", null], // invalid value type
+    ["d", 123], // invalid value type
+    "not an array tag",
+    ["d", "valid-identifier"],
+  ];
+  assert.equal(getDTagValueFromTags(tags), "valid-identifier");
+});
+
+test("getDTagValueFromTags skips empty string d-tag value", (t) => {
+    // nip71 implementation: if (typeof tag[1] === "string" && tag[1]) { ... }
+    const tags = [
+        ["d", ""],
+        ["d", "next-valid"],
+    ];
+    assert.equal(getDTagValueFromTags(tags), "next-valid");
+});