Rework storage structs, link preview

2025-01-08 14:59:04 +01:00
parent b99c064d10
commit a7197b9628
75 changed files with 1365 additions and 1454 deletions
--- a/CHDataManagement/Model/LinkPreview.swift
+++ b/CHDataManagement/Model/LinkPreview.swift
@ -0,0 +1,58 @@
+import Foundation
+
+/**
+ The information to use when constructing the link preview of a page.
+
+ The information will be placed in the `<head>` of the page as `<meta>` tags.
+ */
+final class LinkPreview: ObservableObject {
+
+    /// The description to show when linking to a page (contained in the `<head>` of the page)
+    @Published
+    var title: String?
+
+    /// The image id of the thumbnail to attach to the link preview (contained in the `<head>` of the page)
+    @Published
+    var description: String?
+
+    /// The title to show for a link preview (contained in the `<head>` of the page)
+    @Published
+    var image: FileResource?
+
+    init(title: String? = nil, description: String? = nil, image: FileResource? = nil) {
+        self.title = title
+        self.description = description
+        self.image = image
+    }
+
+    /**
+     Remove a file if it is used in the link preview.
+     */
+    func remove(_ file: FileResource) {
+        if image == file {
+            image = nil
+        }
+    }
+
+    // MARK: Storage
+
+    var data: Data {
+        .init(title: title, description: description, image: image?.id)
+    }
+
+    init(context: LoadingContext, data: Data) {
+        self.title = data.title
+        self.description = data.description
+        self.image = data.image.map(context.image)
+    }
+}
+
+extension LinkPreview {
+
+    /// The object to serialize a link preview for storage
+    struct Data: Codable {
+        let title: String?
+        let description: String?
+        let image: String?
+    }
+}