Addresses v1->v2 issues with emoji

spec/common/utilities/path-pattern.spec.ts

@@ -125,5 +125,22 @@ describe("path-pattern", () => {
         a: "match_a",
       });
     });
+    // handle URL encoded params (e.g. emojis)
+    it("should correctly decode URL encoded params", () => {
+      const pp = new pathPattern.PathPattern("{a}/something/{b}/end");
+
+      expect(pp.extractMatches("%F0%9F%98%80/something/another%20thing/end")).to.deep.equal({
+        a: "😀",
+        b: "another thing",
+      });
+    });
+
+    it("should safely handle malformed URL encoded params", () => {
+      const pp = new pathPattern.PathPattern("{a}/something/end");
+
+      expect(pp.extractMatches("%XX/something/end")).to.deep.equal({
+        a: "%XX",
+      });
+    });
   });
 });

src/common/utilities/path-pattern.ts

@@ -36,6 +36,15 @@ export function trimParam(param: string) {
   return paramNoBraces;
 }
 
+/** @internal */
+export function tryDecodeURIComponent(uri: string): string {
+  try {
+    return decodeURIComponent(uri);
+  } catch (_e) {
+    return uri;
+  }
+}
+
 /** @hidden */
 type SegmentName = "segment" | "single-capture" | "multi-capture";
 
@@ -144,9 +153,11 @@ export class PathPattern {
       const remainingSegments = this.segments.length - 1 - segmentNdx;
       const nextPathNdx = pathSegments.length - remainingSegments;
       if (segment.name === "single-capture") {
-        matches[segment.trimmed] = pathSegments[pathNdx];
+        matches[segment.trimmed] = tryDecodeURIComponent(pathSegments[pathNdx]);
       } else if (segment.name === "multi-capture") {
-        matches[segment.trimmed] = pathSegments.slice(pathNdx, nextPathNdx).join("/");
+        matches[segment.trimmed] = tryDecodeURIComponent(
+          pathSegments.slice(pathNdx, nextPathNdx).join("/")
+        );
       }
       pathNdx = segment.isMultiSegmentWildcard() ? nextPathNdx : pathNdx + 1;
     }