Merge pull request #24450 from petejohanson/urijs-template-parse-parts

urijs: Add URITemplate `parse` and `parts` definitions.

types/urijs/index.d.ts

@@ -239,8 +239,30 @@ declare namespace uri {
     type URITemplateCallback = (keyName: string) => URITemplateValue;
     type URITemplateInput = { [key: string]: URITemplateValue | URITemplateCallback } | URITemplateCallback;
 
+    type URITemplateLiteral = string;
+    interface URITemplateVariable {
+      name: string;
+      explode: boolean;
+      maxLength?: number;
+    }
+
+    interface URITemplateExpression {
+      expression: string;
+      operator: string;
+      variables: ReadonlyArray<URITemplateVariable>;
+    }
+
+    type URITemplatePart = URITemplateLiteral | URITemplateExpression;
+
     interface URITemplate {
       expand(data: URITemplateInput, opts?: Object) : URI;
+      parse(): this;
+
+      /**
+       * @description The parsed parts of the URI Template. Only present after calling
+       *              `parse()` first.
+       */
+      parts?: ReadonlyArray<URITemplatePart>;
     }
 
     interface URITemplateStatic {

types/urijs/urijs-tests.ts

@@ -109,6 +109,9 @@ URI('http://user:pass@example.org:80/foo/bar.html').equals(
     })
 );
 
+const template = URITemplate('/items/{?page,count}');
+template.parse() === template;
+
 /*
 Tests for hasSearch(), hasQuery()
 From: http://medialize.github.io/URI.js/docs.html#search-has