From df43dffaaf2300541deb3c6e83779dc7fde77888 Mon Sep 17 00:00:00 2001
From: Eric Amodio <eamodio@gmail.com>
Date: Tue, 11 Feb 2020 01:47:57 -0500
Subject: [PATCH] Closes #946 - adds alphanumeric flag to autolinks

Fixes ignoreCase flag on autolinks
---
 package.json                 | 15 ++++++++++-----
 src/annotations/autolinks.ts | 11 ++++++++---
 src/config.ts                |  1 +
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/package.json b/package.json
index 1e9f1ed..24f7ef6 100644
--- a/package.json
+++ b/package.json
@@ -70,11 +70,6 @@
 								"type": "string",
 								"description": "Specifies the short prefix to use to generate autolinks for the external resource"
 							},
-							"ignoreCase": {
-								"type": "boolean",
-								"description": "Specifies whether case should be ignored when matching the prefix",
-								"default": false
-							},
 							"title": {
 								"type": [
 									"string",
@@ -86,6 +81,16 @@
 							"url": {
 								"type": "string",
 								"description": "Specifies the url of the external resource you want to link to. Use `<num>` as the variable for the reference number"
+							},
+							"alphanumeric": {
+								"type": "boolean",
+								"description": "Specifies whether alphanumeric should be allowed in `<num>`",
+								"default": false
+							},
+							"ignoreCase": {
+								"type": "boolean",
+								"description": "Specifies whether case should be ignored when matching the prefix",
+								"default": false
 							}
 						}
 					},
diff --git a/src/annotations/autolinks.ts b/src/annotations/autolinks.ts
index d2cb72f..dd6a2a5 100644
--- a/src/annotations/autolinks.ts
+++ b/src/annotations/autolinks.ts
@@ -65,7 +65,10 @@ export class Autolinks implements Disposable {
 			if (!isCacheable(ref)) continue;
 
 			if (ref.messageRegex === undefined) {
-				ref.messageRegex = new RegExp(`(?<=^|\\s|\\()(${ref.prefix}([0-9]+))\\b`, 'g');
+				ref.messageRegex = new RegExp(
+					`(?<=^|\\s|\\()(${ref.prefix}([${ref.alphanumeric ? '\\w' : '0-9'}]+))\\b`,
+					ref.ignoreCase ? 'gi' : 'g'
+				);
 			}
 
 			do {
@@ -127,8 +130,10 @@ export class Autolinks implements Disposable {
 		try {
 			if (ref.messageMarkdownRegex === undefined) {
 				ref.messageMarkdownRegex = new RegExp(
-					`(?<=^|\\s|\\()(${Strings.escapeMarkdown(ref.prefix).replace(/\\/g, '\\\\')}([0-9]+))\\b`,
-					'g'
+					`(?<=^|\\s|\\()(${Strings.escapeMarkdown(ref.prefix).replace(/\\/g, '\\\\')}([${
+						ref.alphanumeric ? '\\w' : '0-9'
+					}]+))\\b`,
+					ref.ignoreCase ? 'gi' : 'g'
 				);
 			}
 
diff --git a/src/config.ts b/src/config.ts
index 9254e37..0b3bd70 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -132,6 +132,7 @@ export interface AutolinkReference {
 	prefix: string;
 	url: string;
 	title?: string;
+	alphanumeric?: boolean;
 	ignoreCase?: boolean;
 }