82 lines
2.2 KiB
Swift
82 lines
2.2 KiB
Swift
//
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// GeminiMarkdownRenderer.swift
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// GeminiRenderer
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//
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// Created by Shadowfacts on 10/1/21.
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//
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import Foundation
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import HTMLEntities
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public class GeminiMarkdownRenderer {
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public init() {
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}
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public func renderDocumentToMarkdown(_ doc: Document) -> String {
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var str = ""
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var inPreformatting = false
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var inList = false
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for line in doc.lines {
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if inList && !line.isListItem {
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str += "\n"
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inList = false
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}
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switch line {
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case let .text(text):
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if !text.trimmingCharacters(in: .whitespaces).isEmpty {
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str += text.htmlEscape()
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str += "\n\n"
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}
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case let .link(url, text: maybeText):
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let text = maybeText ?? url.absoluteString
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// todo: do ] in the text need to be escaped?
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str += "[\(text.htmlEscape())](\(url))"
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str += "\n\n"
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case let .preformattedToggle(alt: alt):
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inPreformatting = !inPreformatting
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if inPreformatting {
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str += "```"
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if let alt = alt {
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str += alt
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}
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str += "\n"
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} else {
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str += "```"
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str += "\n\n"
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}
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case let .preformattedText(text):
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str += text
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str += "\n"
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case let .heading(text, level: level):
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str += String(repeating: "#", count: level.rawValue)
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str += " "
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str += text.htmlEscape()
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str += "\n\n"
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case let .unorderedListItem(text):
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if !inList {
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inList = true
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}
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str += "* \(text.htmlEscape())"
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str += "\n"
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case let .quote(text):
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str += "> "
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str += text.htmlEscape()
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str += "\n\n"
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}
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}
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return str
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}
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}
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