1 files changed, 85 insertions, 0 deletions
diff --git a/MediuxDownloader.cs b/MediuxDownloader.cs
new file mode 100644
index 0000000..a027773
--- /dev/null
+++ b/MediuxDownloader.cs
@@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Plugin.JCoverXtremePro;
+
+public class MediuxDownloader
+{
+    public static MediuxDownloader instance;
+
+    private Regex contentRegex = new(@"<script[^>]*>self\.__next_f\.push(.*?)</script>");
+    private readonly HttpClient httpClientFactory;
+    private string sentinel = "date";
+
+    public MediuxDownloader(IHttpClientFactory httpClientFactory)
+    {
+        this.httpClientFactory = httpClientFactory.CreateClient("MediuxDownloader");
+    }
+
+    private List<JsonNode> ExtractJsonNodes(string httpText)
+    {
+        List<JsonNode> list = new();
+        foreach (Match match in contentRegex.Matches(httpText))
+        {
+            var pushArg = match.Groups[1].Value;
+            var strippedString = StripPushArg(pushArg);
+            if (!strippedString.Contains(sentinel))
+            {
+                Plugin.Logger.LogTrace("Ignoring chunk without sentinel {Sentinel}: {Chunk}", sentinel, strippedString);
+                continue;
+            }
+
+            list.Add(ParseStrippedJsonChunk(strippedString));
+        }
+
+        if (list.Count != 1)
+        {
+            Plugin.Logger.LogError("Found too many or too few chunks: {0}", list);
+        }
+
+        return list;
+    }
+
+    private JsonNode ParseStrippedJsonChunk(string text)
+    {
+        return JsonSerializer.Deserialize<JsonArray>(text.Substring(text.IndexOf(':') + 1))[3];
+    }
+
+    private string StripPushArg(string text)
+    {
+        var stringStart = text.IndexOf('"');
+        var stringEnd = text.LastIndexOf('"');
+        if (stringStart == stringEnd || stringStart == -1)
+        {
+            return "";
+        }
+
+        // TODO: 1 is regular data, 3 is base64 partial data
+        return JsonSerializer.Deserialize<string>(text.Substring(stringStart, stringEnd + 1 - stringStart)) ?? "";
+    }
+
+    private async Task<string> GetString(string url)
+    {
+        return await (await httpClientFactory.GetAsync(url).ConfigureAwait(false))
+            .Content.ReadAsStringAsync().ConfigureAwait(false);
+    }
+
+    public async Task<JsonNode> GetMediuxMetadata(string url)
+    {
+        Plugin.Logger.LogInformation("Loading data from {Url}", url);
+        var text = await GetString(url).ConfigureAwait(false);
+        return ExtractJsonNodes(text).First();
+    }
+
+    public async Task<HttpResponseMessage> DownloadFile(string url)
+    {
+        return await httpClientFactory.GetAsync(url).ConfigureAwait(false);
+    }
+}
+\ No newline at end of file