NetNewsWire/Mac/Scriptability/WebFeed+Scriptability.swift

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//
// Feed+Scriptability.swift
// NetNewsWire
//
// Created by Olof Hellman on 1/10/18.
// Copyright © 2018 Olof Hellman. All rights reserved.
//
import Foundation
import RSParser
import Account
import Articles
@objc(ScriptableWebFeed)
class ScriptableWebFeed: NSObject, UniqueIdScriptingObject, ScriptingObjectContainer {
let webFeed:WebFeed
let container:ScriptingObjectContainer
init (_ webFeed:WebFeed, container:ScriptingObjectContainer) {
self.webFeed = webFeed
self.container = container
}
@objc(objectSpecifier)
override var objectSpecifier: NSScriptObjectSpecifier? {
let scriptObjectSpecifier = self.container.makeFormUniqueIDScriptObjectSpecifier(forObject:self)
return (scriptObjectSpecifier)
}
@objc(scriptingSpecifierDescriptor)
func scriptingSpecifierDescriptor() -> NSScriptObjectSpecifier {
return (self.objectSpecifier ?? NSScriptObjectSpecifier() )
}
// MARK: --- ScriptingObject protocol ---
var scriptingKey: String {
return "webFeeds"
}
// MARK: --- UniqueIdScriptingObject protocol ---
// I am not sure if account should prefer to be specified by name or by ID
// but in either case it seems like the accountID would be used as the keydata, so I chose ID
@objc(uniqueId)
var scriptingUniqueId:Any {
return webFeed.webFeedID
}
// MARK: --- ScriptingObjectContainer protocol ---
var scriptingClassDescription: NSScriptClassDescription {
return self.classDescription as! NSScriptClassDescription
}
func deleteElement(_ element:ScriptingObject) {
}
// MARK: --- handle NSCreateCommand ---
class func urlForNewFeed(arguments:[String:Any]) -> String? {
var url:String?
if let withDataParam = arguments["ObjectData"] {
if let objectDataDescriptor = withDataParam as? NSAppleEventDescriptor {
url = objectDataDescriptor.stringValue
}
} else if let withPropsParam = arguments["ObjectProperties"] as? [String:Any] {
url = withPropsParam["url"] as? String
}
return url
}
class func scriptableFeed(_ feed:WebFeed, account:Account, folder:Folder?) -> ScriptableWebFeed {
let scriptableAccount = ScriptableAccount(account)
if let folder = folder {
let scriptableFolder = ScriptableFolder(folder, container:scriptableAccount)
return ScriptableWebFeed(feed, container:scriptableFolder)
} else {
return ScriptableWebFeed(feed, container:scriptableAccount)
}
}
class func handleCreateElement(command:NSCreateCommand) -> Any? {
guard command.isCreateCommand(forClass:"Feed") else { return nil }
guard let arguments = command.arguments else {return nil}
let titleFromArgs = command.property(forKey:"name") as? String
let (account, folder) = command.accountAndFolderForNewChild()
guard let url = self.urlForNewFeed(arguments:arguments) else {return nil}
if let existingFeed = account.existingWebFeed(withURL:url) {
return scriptableFeed(existingFeed, account:account, folder:folder).objectSpecifier
}
let container: Container = folder != nil ? folder! : account
// We need to download the feed and parse it.
// RSParser does the callback for the download on the main thread.
// Because we can't wait here (on the main thread) for the callback, we have to return from this function.
// Generally, returning from an AppleEvent handler function means that handling the Apple event is over,
// but we dont yet have the result of the event yet, so we prevent the Apple event from returning by calling
// suspendExecution(). When we get the callback, we supply the event result and call resumeExecution().
command.suspendExecution()
account.createWebFeed(url: url, name: titleFromArgs, container: container) { result in
switch result {
case .success(let feed):
NotificationCenter.default.post(name: .UserDidAddFeed, object: self, userInfo: [UserInfoKey.webFeed: feed])
let scriptableFeed = self.scriptableFeed(feed, account:account, folder:folder)
command.resumeExecution(withResult:scriptableFeed.objectSpecifier)
case .failure:
command.resumeExecution(withResult:nil)
}
}
return nil
}
// MARK: --- Scriptable properties ---
@objc(url)
var url:String {
return self.webFeed.url
}
@objc(name)
var name:String {
return self.webFeed.name ?? ""
}
@objc(homePageURL)
var homePageURL:String {
return self.webFeed.homePageURL ?? ""
}
@objc(iconURL)
var iconURL:String {
return self.webFeed.iconURL ?? ""
}
@objc(faviconURL)
var faviconURL:String {
return self.webFeed.faviconURL ?? ""
}
@objc(opmlRepresentation)
var opmlRepresentation:String {
return self.webFeed.OPMLString(indentLevel:0, strictConformance: true)
}
// MARK: --- scriptable elements ---
@objc(authors)
var authors:NSArray {
let feedAuthors = webFeed.authors ?? []
return feedAuthors.map { ScriptableAuthor($0, container:self) } as NSArray
}
@objc(valueInAuthorsWithUniqueID:)
func valueInAuthors(withUniqueID id:String) -> ScriptableAuthor? {
guard let author = webFeed.authors?.first(where:{$0.authorID == id}) else { return nil }
return ScriptableAuthor(author, container:self)
}
@objc(articles)
var articles:NSArray {
let feedArticles = (try? webFeed.fetchArticles()) ?? Set<Article>()
// the articles are a set, use the sorting algorithm from the viewer
let sortedArticles = feedArticles.sorted(by:{
return $0.logicalDatePublished > $1.logicalDatePublished
})
return sortedArticles.map { ScriptableArticle($0, container:self) } as NSArray
}
@objc(valueInArticlesWithUniqueID:)
func valueInArticles(withUniqueID id:String) -> ScriptableArticle? {
let articles = (try? webFeed.fetchArticles()) ?? Set<Article>()
guard let article = articles.first(where:{$0.uniqueID == id}) else { return nil }
return ScriptableArticle(article, container:self)
}
}