mirror of
https://github.com/Ranchero-Software/NetNewsWire.git
synced 2024-12-24 08:41:31 +01:00
199 lines
4.2 KiB
Swift
199 lines
4.2 KiB
Swift
//
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// ArticleRenderer.swift
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// Evergreen
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//
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// Created by Brent Simmons on 9/8/15.
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// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import RSCore
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import Data
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var cachedStyleString = ""
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var cachedTemplate = ""
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class ArticleRenderer {
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let article: Article
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let articleStyle: ArticleStyle
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lazy var longDateFormatter: DateFormatter = {
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let dateFormatter = DateFormatter()
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dateFormatter.dateStyle = .long
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dateFormatter.timeStyle = .medium
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return dateFormatter
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}()
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lazy var mediumDateFormatter: DateFormatter = {
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let dateFormatter = DateFormatter()
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dateFormatter.dateStyle = .medium
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dateFormatter.timeStyle = .short
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return dateFormatter
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}()
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lazy var shortDateFormatter: DateFormatter = {
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let dateFormatter = DateFormatter()
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dateFormatter.dateStyle = .short
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dateFormatter.timeStyle = .short
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return dateFormatter
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}()
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lazy var title: String = {
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if let articleTitle = self.article.title {
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return articleTitle
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}
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return ""
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}()
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lazy var baseURL: URL? = {
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var s = self.article.url
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if s == nil {
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s = self.article.feed?.homePageURL
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}
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if s == nil {
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s = self.article.feed?.url
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}
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if s == nil {
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return nil
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}
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var urlComponents = URLComponents(string: s!)
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if urlComponents == nil {
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return nil
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}
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// Can’t use url-with-fragment as base URL. The webview won’t load. See scripting.com/rss.xml for example.
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urlComponents!.fragment = nil
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if let url = urlComponents!.url {
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if url.scheme == "http" || url.scheme == "https" {
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return url
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}
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}
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return nil
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}()
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var html: String {
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return renderedHTML()
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}
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init(article: Article, style: ArticleStyle) {
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self.article = article
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self.articleStyle = style
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}
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// MARK: Private
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private func textInsideTag(_ text: String, _ tag: String) -> String {
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return "<\(tag)>\(text)</\(tag)>"
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}
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private func styleString() -> String {
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if let s = articleStyle.css {
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return s
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}
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if cachedStyleString.isEmpty {
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let path = Bundle.main.path(forResource: "styleSheet", ofType: "css")!
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let s = try! NSString(contentsOfFile: path, encoding: String.Encoding.utf8.rawValue)
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cachedStyleString = "\n\(s)\n"
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}
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return cachedStyleString
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}
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private func template() -> String {
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if let s = articleStyle.template {
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return s
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}
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if cachedTemplate.isEmpty {
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let path = Bundle.main.path(forResource: "template", ofType: "html")!
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let s = try! NSString(contentsOfFile: path, encoding: String.Encoding.utf8.rawValue)
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cachedTemplate = s as String
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}
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return cachedTemplate
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}
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private func linkWithTextAndClass(_ text: String, _ href: String, _ className: String) -> String {
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return "<a class=\"\(className)\" href=\"\(href)\">\(text)</a>"
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}
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private func linkWithText(_ text: String, _ href: String) -> String {
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return "<a href=\"\(href)\">\(text)</a>"
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}
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private func titleOrTitleLink() -> String {
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if let link = article.preferredLink {
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return linkWithText(title, link)
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}
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return title
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}
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private func substitutions() -> [String: String] {
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var d = [String: String]()
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let title = titleOrTitleLink()
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d["newsitem_title"] = title
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d["article_title"] = title
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let body = article.body == nil ? "" : article.body
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d["article_description"] = body
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d["newsitem_description"] = body
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var feedLink = ""
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if let feedTitle = article.feed?.nameForDisplay {
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feedLink = feedTitle
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if let feedURL = article.feed?.homePageURL {
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feedLink = linkWithTextAndClass(feedTitle, feedURL, "feedLink")
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}
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}
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d["feedlink"] = feedLink
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d["feedlink_withfavicon"] = feedLink
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let longDate = longDateFormatter.string(from: article.logicalDatePublished)
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d["date_long"] = longDate
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let mediumDate = mediumDateFormatter.string(from: article.logicalDatePublished)
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d["date_medium"] = mediumDate
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let shortDate = shortDateFormatter.string(from: article.logicalDatePublished)
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d["date_short"] = shortDate
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return d
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}
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private func renderedHTML() -> String {
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var s = "<!DOCTYPE html><html><head>"
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s += textInsideTag(title, "title")
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s += textInsideTag(styleString(), "style")
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s += "</head></body>"
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s += RSMacroProcessor.renderedText(withTemplate: template(), substitutions: substitutions(), macroStart: "[[", macroEnd: "]]")
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s += "</body></html>"
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// print(s)
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return s
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}
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}
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