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+# Nextcloud/WebDAV Jellyfin Plugin Plan
+
+Below is a high-level plan for a Jellyfin plugin that integrates Nextcloud/WebDAV sources as library content.
+
+```mermaid
+flowchart TD
+  subgraph Plugin Core
+    A[PluginConfiguration<br/>– holds URL, creds, paths]
+    B[Plugin<br/>– BasePlugin<Config>]
+    C[IPluginServiceRegistrator<br/>– registers services]
+    D[IHostedService<br/>– hook on startup]
+  end
+
+  subgraph Services
+    E[WebDavClientService<br/>– wraps WebDav.Client]
+    F[RemoteLibraryProvider<br/>– implements virtual folder scanning]
+    G[CachingLayer<br/>– buffer / temporary file cache]
+    H[StreamingController<br/>– ControllerBase for proxying streams]
+  end
+
+  subgraph Jellyfin Core
+    I[ILibraryManager<br/>– library registration]
+    J[Scan Engine<br/>– calls provider to enumerate items]
+    K[HTTP Pipeline<br/>– routes to controllers]
+  end
+
+  A --> B
+  B --> C
+  C --> E
+  C --> F
+  E --> F
+  F --> J
+  F --> G
+  G --> H
+  H --> K
+  D --> I
+  I --> J
+```
+
+## 1. Skeleton & Setup
+- Copy the `jellyfin-plugin-template` and rename to `Jellyfin.Plugin.Nextcloud`.
+- Update project metadata: plugin ID, name, version in `.csproj`.
+- Add NuGet reference to `WebDav.Client`.
+
+## 2. Configuration & Dependency Injection
+- Define `PluginConfiguration` with URL, credentials, root path, and cache settings.
+- Implement `Plugin : BasePlugin<PluginConfiguration>` to override `Name`, `Id`, and inject DI.
+- Create `IPluginServiceRegistrator` to register services:
+  - `WebDavClientService` (singleton)
+  - `RemoteLibraryProvider` (scanning)
+  - `StreamingController` (ASP.NET Controller)
+- Register virtual folder with `ILibraryManager.RegisterVirtualFolder` on startup.
+
+## 3. Scanning Integration
+- Research Jellyfin scan engine provider interfaces.
+- Implement `RemoteLibraryProvider` to list directories/files via `WebDavClientService`.
+- Map each remote item to a `BaseItem` (e.g., `Video`, `Folder`) with metadata.
+- Track ETags or timestamps to support incremental scans.
+
+## 4. Streaming & Caching
+- Create `StreamingController : ControllerBase` with endpoint `/WebDav/Stream/{itemId}`.
+- Map `itemId` to remote path and stream via `WebDavClientService.GetStream`.
+- Implement `CachingLayer` to buffer chunks and write to temp files to prevent stalls.
+
+## 5. Admin UI
+- Define `configPage.html` as an embedded resource and implement `IHasWebPages` in `Plugin.cs` to return a `PluginPageInfo` for the settings page.
+- Update `build.yaml` to include a `pages` section:
+  ```yaml
+  pages:
+    - name: WebDAV
+      embeddedResourcePath: Jellyfin.Plugin.Webdav.Configuration.configPage.html
+  ```
+- Rebuild the plugin so that MSBuild generates a `plugin.json` manifest containing the pages definition.
+- Deploy the `plugin.json`, DLL, and dependencies to Jellyfin’s `plugins` folder.
+- Restart Jellyfin to verify the “WebDAV” settings page appears under Admin → Plugins.
+
+## 6. Testing & Validation
+- Unit-test `WebDavClientService` using a test Nextcloud instance or mock.
+- Deploy plugin locally; verify library shows Nextcloud virtual folders.
+- Test playback to ensure smooth streaming.
+
+## 7. Documentation & Release
+- Write README with installation, configuration, and troubleshooting guidance.
+- Bump version, package plugin (`.nupkg`), and publish to GitHub Releases.
+
+### Milestones
+- **M1**: Plugin skeleton & DI wiring  
+- **M2**: Scanning proof-of-concept  
+- **M3**: Streaming proxy & caching  
+- **M4**: Admin UI & settings page  
+- **M5**: Testing, documentation, release
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