From 6c1b473ab8ce04f2529393730df1c13ef85e6ccc Mon Sep 17 00:00:00 2001
From: Christoph Hagen <github@christophhagen.de>
Date: Mon, 6 Jan 2025 10:08:50 +0100
Subject: [PATCH] Write AVIF image generation script

---
 CHDataManagement.xcodeproj/project.pbxproj      |  2 +-
 CHDataManagement/Generator/ImageGenerator.swift | 16 ++++++++++++++--
 CHDataManagement/Model/Content+Generation.swift |  2 +-
 CHDataManagement/Model/FileResource.swift       |  4 ++--
 CHDataManagement/Storage/Storage.swift          | 11 +++++++++--
 5 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/CHDataManagement.xcodeproj/project.pbxproj b/CHDataManagement.xcodeproj/project.pbxproj
index 74af446..2c944b0 100644
--- a/CHDataManagement.xcodeproj/project.pbxproj
+++ b/CHDataManagement.xcodeproj/project.pbxproj
@@ -656,8 +656,8 @@
 		E2A21C342CB9A3CA0060935B /* Settings */ = {
 			isa = PBXGroup;
 			children = (
-				E2FE0F3D2D2B4225002963B7 /* AudioSettingsDetailView.swift */,
 				E29D318C2D0B2E5E0051B7F4 /* Content */,
+				E2FE0F3D2D2B4225002963B7 /* AudioSettingsDetailView.swift */,
 				E29D316E2D0822720051B7F4 /* SettingsListView.swift */,
 				E29D31702D08234D0051B7F4 /* GenerationDetailView.swift */,
 				E25DA5942D023BCC00AEF16D /* PageSettingsDetailView.swift */,
diff --git a/CHDataManagement/Generator/ImageGenerator.swift b/CHDataManagement/Generator/ImageGenerator.swift
index b5e1b73..a14db81 100644
--- a/CHDataManagement/Generator/ImageGenerator.swift
+++ b/CHDataManagement/Generator/ImageGenerator.swift
@@ -38,8 +38,20 @@ final class ImageGenerator {
 
     private var avifCommands: Set<String> = []
 
-    func printAvifCommands() {
-        avifCommands.sorted().forEach { print($0) }
+    /**
+     Write a file to the output folder containing a script to generate all missing AVIF images.
+
+     - Note: AVIF images could be generated internally, but the process is very slow.
+     */
+    func writeAvifCommandScript() {
+        guard !avifCommands.isEmpty else {
+            if storage.hasFileInOutputFolder("generate-images.sh") {
+                storage.deleteInOutputFolder("generate-images.sh")
+            }
+            return
+        }
+        let content = avifCommands.sorted().joined(separator: "\n")
+        storage.write(content, to: "generate-images.sh")
     }
 
     /**
diff --git a/CHDataManagement/Model/Content+Generation.swift b/CHDataManagement/Model/Content+Generation.swift
index 924c730..ae51721 100644
--- a/CHDataManagement/Model/Content+Generation.swift
+++ b/CHDataManagement/Model/Content+Generation.swift
@@ -81,7 +81,7 @@ extension Content {
         }
 
         imageGenerator.save()
-        imageGenerator.printAvifCommands()
+        imageGenerator.writeAvifCommandScript()
         //let images = Set(self.images.map { $0.id })
         //imageGenerator.recalculateGeneratedImages(by: images)
     }
diff --git a/CHDataManagement/Model/FileResource.swift b/CHDataManagement/Model/FileResource.swift
index 249b957..273e2a7 100644
--- a/CHDataManagement/Model/FileResource.swift
+++ b/CHDataManagement/Model/FileResource.swift
@@ -144,7 +144,7 @@ final class FileResource: Item {
     func removeGeneratedImages() {
         guard type.isImage else { return }
         content.imageGenerator.removeVersions(of: id)
-        content.storage.deleteInOutputFolder(path: outputImageFolder)
+        content.storage.deleteInOutputFolder(outputImageFolder)
     }
 
     private var failureImage: Image {
@@ -182,7 +182,7 @@ final class FileResource: Item {
     // MARK: Paths
 
     func removeFileFromOutputFolder() {
-        content.storage.deleteInOutputFolder(path: absoluteUrl)
+        content.storage.deleteInOutputFolder(absoluteUrl)
         if type.isImage {
             removeGeneratedImages()
         }
diff --git a/CHDataManagement/Storage/Storage.swift b/CHDataManagement/Storage/Storage.swift
index ffdfb73..2881d0d 100644
--- a/CHDataManagement/Storage/Storage.swift
+++ b/CHDataManagement/Storage/Storage.swift
@@ -280,9 +280,9 @@ final class Storage: ObservableObject {
     }
 
     @discardableResult
-    func deleteInOutputFolder(path: String) -> Bool {
+    func deleteInOutputFolder(_ relativePath: String) -> Bool {
         guard let outputScope else { return false }
-        return outputScope.deleteFile(at: path)
+        return outputScope.deleteFile(at: relativePath)
     }
 
     /**
@@ -400,11 +400,18 @@ final class Storage: ObservableObject {
 
     // MARK: Output files
 
+    /**
+     Write the content of a file to a relative path of the output folder.
+     */
+    @discardableResult
     func write(_ content: String, to relativeOutputPath: String) -> Bool {
         guard let outputScope else { return false }
         return outputScope.write(content, to: relativeOutputPath)
     }
 
+    /**
+     Write the data of a file to a relative path of the output folder.
+     */
     func write(_ data: Data, to relativeOutputPath: String) -> Bool {
         guard let outputScope else { return false }
         return outputScope.write(data, to: relativeOutputPath)