CI: Check image links (#131)

.github/workflows/check_links.yml

@@ -0,0 +1,48 @@
+name: Picture Health
+
+on:
+  pull_request:
+    # Default events are opened, synchronized or reopened
+  workflow_dispatch:
+  schedule:
+    # Runs at the start of each month (UTC)
+    - cron: '0 0 1 * *'
+
+jobs:
+  check_urls:
+    # Do not run the scheduled workflow on forks
+    if: ( github.event_name != 'schedule' || github.repository_owner == 'Cockatrice' )
+
+    name: Check image links
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up lychee cache
+        uses: actions/cache@v3
+        with:
+          path: .lycheecache
+          key: cache-lychee-${{ github.sha }}
+          restore-keys: cache-lychee-
+
+      # Extract and check URLs directly from tokens.xml
+      - name: Check tokens.xml URLs
+        uses: lycheeverse/lychee-action@v1.5.1
+        if: always()
+        continue-on-error: true
+        with:
+          args: '--no-progress --require-https --cache --max-cache-age 1h -- tokens.xml'
+          fail: true
+          jobSummary: true
+
+      # Extract and check URLs directly from challenge_tokens.xml
+      - name: Check challenge_tokens.xml URLs
+        uses: lycheeverse/lychee-action@v1.5.1
+        if: always()
+        continue-on-error: true
+        with:
+          args: '--no-progress --require-https --cache --max-cache-age 1h -- challenge_tokens.xml'
+          fail: true
+          jobSummary: true

README.md

@@ -1,6 +1,6 @@
 [![Discord](https://img.shields.io/discord/314987288398659595?label=Discord&logo=discord&logoColor=white)](https://discord.gg/3Z9yzmA) [![Gitter Chat](https://img.shields.io/gitter/room/Cockatrice/Magic-Spoiler)](https://gitter.im/Cockatrice/Magic-Spoiler)
 
-Magic-Token [![](https://img.shields.io/badge/dynamic/xml.svg?label=version&url=https%3A%2F%2Fraw.githubusercontent.com%2FCockatrice%2FMagic-Token%2Fmaster%2Ftokens.xml&query=%2F%2FsourceVersion)](https://github.com/Cockatrice/Magic-Token/blob/master/tokens.xml)
+Magic-Token [![](https://img.shields.io/badge/dynamic/xml.svg?label=version&url=https%3A%2F%2Fraw.githubusercontent.com%2FCockatrice%2FMagic-Token%2Fmaster%2Ftokens.xml&query=%2F%2FsourceVersion)](https://github.com/Cockatrice/Magic-Token/blob/master/tokens.xml) [![Picture Health](https://github.com/Cockatrice/Magic-Token/actions/workflows/check_links.yml/badge.svg?branch=master)](https://github.com/Cockatrice/Magic-Token/actions/workflows/check_links.yml?query=branch%3Amaster)
 =================
 
 This repo contains token information in [Cockatrice](https://github.com/cockatrice/cockatrice)'s [XML card database format](https://github.com/Cockatrice/Cockatrice/wiki/Custom-Cards-&-Sets#to-add-your-own-custom-cards-follow-these-steps) for Magic: The Gathering.<br />