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