Create public, Sendable ParsedOPML* structs to match what we do with feed parsing.

Modules/Parser/Sources/Parser/OPML/OPMLDocument.swift

@@ -7,9 +7,8 @@
 
 import Foundation
 
-public struct OPMLDocument: Sendable {
+final class OPMLDocument: OPMLItem, @unchecked Sendable {
 
-	public let title: String
+	var title: String?
-	public let url: String
+	var url: String?
-	public let items: [OPMLItem]?
 }

Modules/Parser/Sources/Parser/OPML/OPMLItem.swift

@@ -8,17 +8,19 @@
 import Foundation
 import os
 
-public struct OPMLItem: Sendable {
+class OPMLItem: @unchecked Sendable {
 
 	public let feedSpecifier: OPMLFeedSpecifier
 
 	public let attributes: [String: String]
 	public let titleFromAttributes: String?
 
-	public let isFolder: Bool
+	public var items: [OPMLItem]?
-	public let items: [OPMLItem]?
+	public var isFolder: Bool {
+		items.count > 0
+	}
 
-	init?(attributes: [String : String], items: [OPMLItem]?) {
+	init?(attributes: [String : String]) {
 
 		guard let feedURL = attributes.opml_xmlUrl, !feedURL.isEmpty else {
 			return nil
@@ -35,8 +37,13 @@ public struct OPMLItem: Sendable {
 		self.feedSpecifier = OPMLFeedSpecifier(title: titleFromAttributes, feedDescription: attributes.opml_description, homePageURL: attributes.opml_htmlUrl, feedURL: feedURL)
 
 		self.attributes = attributes
+	}
 
-		self.items = items
+	func addItem(_ item: OPMLItem) {
-		self.isFolder = (items?.count ?? 0) > 0
+		
+		if items == nil {
+			items = [OPMLItem]()
+		}
+		items?.append(item)
 	}
 }

Modules/Parser/Sources/Parser/OPML/OPMLParser.swift

@@ -0,0 +1,60 @@
+//
+//  OPMLParser.swift
+//
+//
+//  Created by Brent Simmons on 8/18/24.
+//
+
+import Foundation
+
+public final class OPMLParser {
+
+	let url: String
+	let data: Data
+
+	private var itemStack = [OPMLItem]()
+	
+	enum OPMLParserError: Error {
+		case notOPML
+	}
+
+	init(parserData: ParserData) {
+
+		self.url = parserData.url
+		self.data = parserData.data
+	}
+
+	func parse() throws -> OPMLDocument? {
+
+		guard canParseData() else {
+			throw OPMLParserError.notOPML
+		}
+
+		let parser = SAXParser(delegate: self, data: data)
+		
+
+	}
+}
+
+extension OPMLParser: SAXParserDelegate {
+
+	func saxParser(_: SAXParser, xmlStartElement: XMLPointer, prefix: XMLPointer?, uri: XMLPointer?, namespaceCount: Int, namespaces: UnsafeMutablePointer<XMLPointer?>?, attributeCount: Int, attributesDefaultedCount: Int, attributes: UnsafeMutablePointer<XMLPointer?>?) {
+
+	}
+
+	func saxParser(_: SAXParser, xmlEndElement: XMLPointer, prefix: XMLPointer?, uri: XMLPointer?) {
+
+	}
+
+	func saxParser(_: SAXParser, xmlCharactersFound: XMLPointer, count: Int) {
+
+	}
+
+	func saxParser(_: SAXParser, internedStringForName: XMLPointer, prefix: XMLPointer?) -> String? {
+
+	}
+
+	func saxParser(_: SAXParser, internedStringForValue: XMLPointer, count: Int) -> String? {
+
+	}
+}

Modules/Parser/Sources/Parser/OPML/ParsedOPMLDocument.swift

@@ -0,0 +1,25 @@
+//
+//  ParsedOPMLDocument.swift
+//
+//
+//  Created by Brent Simmons on 8/18/24.
+//
+
+import Foundation
+
+public final class ParsedOPMLDocument: Sendable {
+
+	public let title: String?
+	public let url: String?
+	public let items: [ParsedOPMLItem]?
+
+	init(opmlDocument: OPMLDocument) {
+
+		self.title = opmlDocument.title
+		self.url = opmlDocument.url
+
+		self.items = opmlDocument.items.map { opmlItem in
+			ParsedOPMLItem(opmlItem: opmlItem)
+		}
+	}
+}

Modules/Parser/Sources/Parser/OPML/ParsedOPMLFeedSpecifier.swift

@@ -0,0 +1,24 @@
+//
+//  ParsedOPMLFeedSpecifier.swift
+//
+//
+//  Created by Brent Simmons on 8/18/24.
+//
+
+import Foundation
+
+public struct ParsedOPMLFeedSpecifier: Sendable {
+
+	public let title: String?
+	public let feedDescription: String?
+	public let homePageURL: String?
+	public let feedURL: String
+
+	init(_ opmlFeedSpecifier: OPMLFeedSpecifier) {
+
+		self.title = opmlFeedSpecifier.title
+		self.feedDescription = opmlFeedSpecifier.feedDescription
+		self.homePageURL = opmlFeedSpecifier.homePageURL
+		self.feedURL = opmlFeedSpecifier.feedURL
+	}
+}

Modules/Parser/Sources/Parser/OPML/ParsedOPMLItem.swift

@@ -0,0 +1,31 @@
+//
+//  File.swift
+//  
+//
+//  Created by Brent Simmons on 8/18/24.
+//
+
+import Foundation
+
+public struct ParsedOPMLItem: Sendable {
+
+	public let feedSpecifier: ParsedOPMLFeedSpecifier?
+
+	public let attributes: [String: String]?
+	public let title: String?
+
+	public var items: [ParsedOPMLItem]?
+	public var isFolder: Bool
+
+	init(opmlItem: OPMLItem) {
+
+		self.feedSpecifier = ParsedOPMLFeedSpecifier(opmlItem.feedSpecifier)
+		self.attributes = opmlItem.attributes
+		self.title = opmlItem.title
+
+		self.items = opmlItem.items.map { opmlItem in
+			ParsedOPMLItem(opmlItem: opmlItem)
+		}
+		self.isFolder = (self.items?.count ?? 0) > 0
+	}
+}