From cb9af225f069539cc0ef6d8525339bae86d0612d Mon Sep 17 00:00:00 2001
From: Christoph Hagen <github@christophhagen.de>
Date: Mon, 6 Jan 2025 10:19:51 +0100
Subject: [PATCH] Generate list of external files

---
 .../Blocks/AudioBlockProcessor.swift          |  1 +
 .../Commands/AudioPlayerCommand.swift         |  2 ++
 .../Model/Content+Generation.swift            | 24 +++++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/CHDataManagement/Generator/Blocks/AudioBlockProcessor.swift b/CHDataManagement/Generator/Blocks/AudioBlockProcessor.swift
index bd994b4..4d177c7 100644
--- a/CHDataManagement/Generator/Blocks/AudioBlockProcessor.swift
+++ b/CHDataManagement/Generator/Blocks/AudioBlockProcessor.swift
@@ -52,6 +52,7 @@ struct AudioBlockProcessor: KeyedBlockProcessor {
             url: file.absoluteUrl,
             cover: coverImage.outputPath)
 
+        results.require(file: file)
         results.require(image: coverImage)
         results.require(footer: footer)
         results.require(headers: .audioPlayerJs, .audioPlayerCss)
diff --git a/CHDataManagement/Generator/Commands/AudioPlayerCommand.swift b/CHDataManagement/Generator/Commands/AudioPlayerCommand.swift
index 1962975..68cf7c5 100644
--- a/CHDataManagement/Generator/Commands/AudioPlayerCommand.swift
+++ b/CHDataManagement/Generator/Commands/AudioPlayerCommand.swift
@@ -67,7 +67,9 @@ struct AudioPlayerCommand: CommandProcessor {
             let coverSize = 2 * content.settings.audioPlayer.playlistCoverImageSize
             let coverImage = image.imageVersion(width: coverSize, height: coverSize, type: image.type)
             let coverUrl = coverImage.outputPath
+
             results.require(image: coverImage)
+            results.require(file: audioFile)
 
             let playlistItem = AudioPlayer.PlaylistItem(
                 index: playlist.count,
diff --git a/CHDataManagement/Model/Content+Generation.swift b/CHDataManagement/Model/Content+Generation.swift
index ae51721..4c449f3 100644
--- a/CHDataManagement/Model/Content+Generation.swift
+++ b/CHDataManagement/Model/Content+Generation.swift
@@ -12,6 +12,7 @@ extension Content {
             self.copyRequiredFiles()
             self.generateRequiredImages()
             self.results.recalculate()
+            self.generateListOfExternalFiles()
             self.status("Generation completed")
         }
     }
@@ -279,4 +280,27 @@ extension Content {
             return
         }
     }
+
+    // MARK: Additional infos
+
+    private var externalFileListName: String { "external-files.txt" }
+
+    private func generateListOfExternalFiles() {
+        let files = results.requiredFiles
+            .filter { $0.isExternallyStored }
+
+        guard !files.isEmpty else {
+            if storage.hasFileInOutputFolder(externalFileListName) {
+                storage.deleteInOutputFolder(externalFileListName)
+            }
+            return
+        }
+
+        let content = files
+            .map { $0.absoluteUrl }
+            .sorted()
+            .joined(separator: "\n")
+
+        storage.write(content, to: externalFileListName)
+    }
 }