fetch meal rss feed

Author: kiliankoe

Package.resolved

@@ -1,6 +1,15 @@
 {
   "object": {
     "pins": [
+      {
+        "package": "FeedKit",
+        "repositoryURL": "https://github.com/nmdias/FeedKit.git",
+        "state": {
+          "branch": null,
+          "revision": "68493a33d862c33c9a9f67ec729b3b7df1b20ade",
+          "version": "9.1.2"
+        }
+      },
       {
         "package": "HTMLString",
         "repositoryURL": "https://github.com/alexaubry/HTMLString.git",

Package.swift

@@ -18,11 +18,12 @@ let package = Package(
     dependencies: [
         .package(url: "https://github.com/alexaubry/HTMLString.git", from: "5.0.0"),
         .package(url: "https://github.com/sharplet/Regex.git", from: "2.1.0"),
+        .package(url: "https://github.com/nmdias/FeedKit.git", from: "9.1.2"),
     ],
     targets: [
         .target(
             name: "EmealKit",
-            dependencies: ["HTMLString", "Regex"]),
+            dependencies: ["HTMLString", "Regex", "FeedKit"]),
         .testTarget(
             name: "EmealKitTests",
             dependencies: ["EmealKit"]),

Sources/EmealKit/Mensa/Meal.swift

@@ -11,6 +11,8 @@ public struct Meal: Identifiable, Equatable, Decodable {
     public var image: URL
     public var url: URL
 
+    public var isSoldOut: Bool?
+
     private enum CodingKeys: String, CodingKey {
         case id
         case name

Sources/EmealKit/Mensa/MealFeed.swift

@@ -0,0 +1,59 @@
+import Foundation
+import FeedKit
+import os.log
+
+extension Meal {
+    public struct RSSMeal {
+        public let title: String
+        public let description: String
+        public let guid: String
+        public let link: String
+        public let author: String
+
+        func matches(meal: Meal) -> Bool {
+            return link.contains(String(meal.id))
+        }
+    }
+
+    public static func rssData(session: URLSession = .shared) async throws -> [RSSMeal] {
+        let feedURL = URL(string: "https://www.studentenwerk-dresden.de/feeds/speiseplan.rss")!
+        let parser = FeedParser(URL: feedURL)
+        return try await withCheckedThrowingContinuation { continuation in
+            parser.parseAsync { result in
+                switch result {
+                case .success(let feed):
+                    guard (feed.rssFeed?.title?.contains("von heute") ?? false) else {
+                        Logger.emealKit.error("Wrong feed?")
+                        continuation.resume(returning: [])
+                        return
+                    }
+                    guard let items = feed.rssFeed?.items else {
+                        Logger.emealKit.error("No feed items found")
+                        continuation.resume(returning: [])
+                        return
+                    }
+                    let meals = items.compactMap { item -> RSSMeal? in
+                        guard let title = item.title,
+                              let description = item.description,
+                              let guid = item.guid?.value,
+                              let link = item.link,
+                              let author = item.author
+                        else {
+                            return nil
+                        }
+                        return RSSMeal(
+                            title: title,
+                            description: description,
+                            guid: guid,
+                            link: link,
+                            author: author
+                        )
+                    }
+                    continuation.resume(returning: meals)
+                case .failure(let error):
+                    continuation.resume(throwing: error)
+                }
+            }
+        }
+    }
+}