52 lines
2.2 KiB
Swift
52 lines
2.2 KiB
Swift
import Foundation
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struct PageHeadGenerator {
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// TODO: Add to configuration
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static let linkPreviewDesiredImageWidth = 1600
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let factory: TemplateFactory
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private let results: GenerationResultsHandler
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init(factory: TemplateFactory, results: GenerationResultsHandler) {
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self.factory = factory
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self.results = results
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}
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func generate(page: Element, language: String, headers: RequiredHeaders = .init()) -> String {
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let metadata = page.localized(for: language)
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var content = [PageHeadTemplate.Key : String]()
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content[.author] = page.author
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content[.title] = metadata.linkPreviewTitle
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content[.description] = metadata.linkPreviewDescription
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if let image = page.linkPreviewImage(for: language) {
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// Note: Generate separate destination link for the image,
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// since we don't want a single large image for thumbnails.
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// Warning: Link preview source path must be relative to root
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let linkPreviewImageName = "thumbnail-link.\(image.lastComponentAfter("."))"
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let sourceImagePath = page.pathRelativeToRootForContainedInputFile(image)
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let destinationImagePath = page.pathRelativeToRootForContainedInputFile(linkPreviewImageName)
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results.requireSingleImage(
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source: sourceImagePath,
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destination: destinationImagePath,
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requiredBy: page.path,
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width: PageHeadGenerator.linkPreviewDesiredImageWidth)
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content[.image] = factory.html.linkPreviewImage(file: linkPreviewImageName)
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}
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content[.customPageContent] = results.getContentOfOptionalFile(at: page.additionalHeadContentPath, source: page.path)
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let head = (content[.customPageContent].unwrapped { [$0] } ?? []) + headers
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.sorted { $0.rawValue < $1.rawValue }
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.map { option in
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let scriptPath = "assets/js/\(option.rawValue)"
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let relative = page.relativePathToOtherSiteElement(file: scriptPath)
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return factory.html.scriptInclude(path: relative, asModule: option.asModule)
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}
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content[.customPageContent] = head.joined(separator: "\n")
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return factory.pageHead.generate(content)
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}
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}
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