NetNewsWire/Shared/ArticleStyles/ArticleTheme.swift

//
//  ArticleTheme.swift
//  NetNewsWire
//
//  Created by Brent Simmons on 9/26/15.
//  Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//

import Foundation

struct ArticleTheme: Equatable {

	static let defaultTheme = ArticleTheme()
	let path: String?
	let template: String?
	let css: String?
	let systemMessageCSS: String?
	let info: NSDictionary?

	init() {
		self.path = nil;
		self.systemMessageCSS = nil

		self.info = ["CreatorHomePage": "https://netnewswire.com/", "CreatorName": "Ranchero Software", "Version": "1.0"]

		let sharedCSSPath = Bundle.main.path(forResource: "shared", ofType: "css")!
		let platformCSSPath = Bundle.main.path(forResource: "styleSheet", ofType: "css")!

		if let sharedCSS = stringAtPath(sharedCSSPath), let platformCSS = stringAtPath(platformCSSPath) {
			css = sharedCSS + "\n" + platformCSS
		} else {
			css = nil
		}

		let templatePath = Bundle.main.path(forResource: "template", ofType: "html")!
		template = stringAtPath(templatePath)
	}

	init(path: String) {

		self.path = path

		let isFolder = FileManager.default.isFolder(atPath: path)

		if isFolder {

			let infoPath = (path as NSString).appendingPathComponent("Info.plist")
			self.info = NSDictionary(contentsOfFile: infoPath)

			let cssPath = (path as NSString).appendingPathComponent("stylesheet.css")
			self.css = stringAtPath(cssPath)

			let systemMessageCSSPath = (path as NSString).appendingPathComponent("system_message_stylesheet.css")
			self.systemMessageCSS = stringAtPath(systemMessageCSSPath)

			let templatePath = (path as NSString).appendingPathComponent("template.html")
			self.template = stringAtPath(templatePath)
		}

		else {

			self.css = stringAtPath(path)
			self.template = nil
			self.systemMessageCSS = nil
			self.info = nil
		}
	}
}

private func stringAtPath(_ f: String) -> String? {

	if !FileManager.default.fileExists(atPath: f) {
		return nil
	}

	if let s = try? NSString(contentsOfFile: f, usedEncoding: nil) as String {
		return s
	}
	return nil
}