49 lines
2.0 KiB
Swift
49 lines
2.0 KiB
Swift
import Foundation
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struct PageHeadGenerator {
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static let linkPreviewDesiredImageWidth = 1600
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let factory: TemplateFactory
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init(factory: TemplateFactory) {
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self.factory = factory
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}
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func generate(page: Element, language: String, includesCode: Bool = false) -> 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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files.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] = page.customHeadContent()
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if includesCode {
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let scriptPath = "assets/js/highlight.js"
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let relative = page.relativePathToOtherSiteElement(file: scriptPath)
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let includeText = factory.html.scriptInclude(path: relative)
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if let head = content[.customPageContent] {
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content[.customPageContent] = head + "\n" + includeText
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} else {
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content[.customPageContent] = includeText
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}
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}
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return factory.pageHead.generate(content)
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}
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}
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