custom explore page + api

Pocket Poster/API/CowabungaAPI.swift

@@ -0,0 +1,79 @@
+//
+//  CowabungaAPI.swift
+//  Pocket Poster
+//
+//  Created by lemin on 7/15/25.
+//
+
+import UIKit
+
+enum FilterType: String, CaseIterable {
+    case random = "Random"
+    case newest = "Newest"
+    case oldest = "Oldest"
+}
+
+class CowabungaAPI: ObservableObject {
+    
+    static let shared = CowabungaAPI()
+    
+    var serverURL = ""
+    var session = URLSession.shared
+    
+    func fetchWallpapers(type: DownloadableWallpaper.WallpaperType) async throws -> [DownloadableWallpaper] {
+        let request = URLRequest(url: .init(string: serverURL + "wallpapers-\(type.rawValue).json")!)
+        
+        let (data, response) = try await session.data(for: request) as! (Data, HTTPURLResponse)
+        guard response.statusCode == 200 else { throw APIError.connectionFailed }
+        let wallpapers = try JSONDecoder().decode([DownloadableWallpaper].self, from: data)
+        
+        for i in wallpapers.indices {
+            wallpapers[i].type = type
+        }
+        
+        return wallpapers
+    }
+    
+    func filterWallpapers(wallpapers: [DownloadableWallpaper], filterType: FilterType) -> [DownloadableWallpaper] {
+        var filtered = wallpapers
+        if filterType == FilterType.newest {
+            filtered = filtered.reversed()
+        } else if filterType == FilterType.random {
+            filtered = filtered.shuffled()
+        }
+        return filtered
+    }
+    
+    func getCommitHash() async throws -> String {
+        let request = URLRequest(url: .init(string: serverURL + "https://api.github.com/repos/SerStars/nugget-wallpapers/commits/main")!)
+        
+        let (data, response) = try await session.data(for: request) as! (Data, HTTPURLResponse)
+        guard response.statusCode == 200 else { throw APIError.connectionFailed }
+        guard let repoinfo = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] else { throw APIError.repoHashError }
+        guard let hash = repoinfo["sha"] as? String else { throw APIError.repoHashError }
+        return hash
+    }
+    
+    func getDownloadURLForWallpaper(wallpaper: DownloadableWallpaper) -> URL {
+        if wallpaper.url.hasPrefix("https://") {
+            URL(string: wallpaper.url)!
+        } else {
+            URL(string: serverURL + wallpaper.url)!
+        }
+    }
+    
+    func getPreviewURLForWallpaper(wallpaper: DownloadableWallpaper) -> URL {
+        URL(string: serverURL + wallpaper.preview)!
+    }
+    
+    init() {
+        Task {
+            do {
+                let hash = try await getCommitHash()
+                serverURL = "https://raw.githubusercontent.com/SerStars/nugget-wallpapers/\(hash)/"
+            } catch {
+                 await UIApplication.shared.alert(body: error.localizedDescription)
+            }
+        }
+    }
+}