Class: Helper

Inherits:
Object
  • Object
show all
Defined in:
lib/Helper.rb

Constant Summary collapse

INLINE_MARKDOWN_ESCAPE_CHARS =

Characters with inline markdown meaning at any position — they can always trigger syntax (emphasis, code spans, link/image start), so escape them everywhere.

['\\', '`', '*', '_', '[', ']'].freeze
INLINE_MARKDOWN_ESCAPE_REGEX = 
/[\\`*_\[\]]/.freeze
LINE_START_ESCAPE_CHARS =

Characters that only have meaning at the start of a paragraph (heading, blockquote, unordered list). Inside a line they’re plain text and don’t need a backslash.

['#', '>', '-', '+'].freeze

Class Method Summary collapse

Class Method Details

.createDirIfNotExist(dirPath) ⇒ Object 



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# File 'lib/Helper.rb', line 79

def self.createDirIfNotExist(dirPath)
    return if dirPath.nil? || dirPath.empty?
    FileUtils.mkdir_p(dirPath)
end

.createPostInfo(postInfo, isPin, isLockedPreviewOnly, isForJekyll) ⇒ Object 



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# File 'lib/Helper.rb', line 136

def self.createPostInfo(postInfo, isPin, isLockedPreviewOnly, isForJekyll)
    title = postInfo.title&.gsub("[", "")&.gsub("]", "")

    tags = ""
    if !postInfo.tags.nil? && postInfo.tags.length > 0
        tags = "\"#{postInfo.tags.map { |tag| tag&.gsub("\"", "\\\"") }.join("\",\"")}\""
    end

    result = "---\n"
    result += "title: \"#{title&.gsub("\"", "\\\"")}\"\n"
    result += "author: \"#{postInfo.creator&.gsub("\"", "\\\"")}\"\n"
    result += "date: #{postInfo.firstPublishedAt.strftime('%Y-%m-%dT%H:%M:%S.%L%z')}\n"
    result += "last_modified_at: #{postInfo.latestPublishedAt.strftime('%Y-%m-%dT%H:%M:%S.%L%z')}\n"
    result += "categories: [\"#{postInfo.collectionName&.gsub("\"", "\\\"")}\"]\n"
    result += "tags: [#{tags}]\n"
    result += "description: \"#{postInfo.description&.gsub("\"", "\\\"")}\"\n"
    if !postInfo.previewImage.nil?
        result += "image:\r\n"
        result += "  path: /#{postInfo.previewImage}\r\n"
    end
    if isPin == true
        result += "pin: true\r\n"
    end
    if isLockedPreviewOnly == true
        result += "lockedPreviewOnly: true\r\n"
    end

    if isForJekyll
        result += "render_with_liquid: false\n"
    end
    result += "---\n"
    result += "\r\n"

    result
end

.createViewFullPost(postURL, isForJekyll) ⇒ Object 



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# File 'lib/Helper.rb', line 219

def self.createViewFullPost(postURL, isForJekyll)
    jekyllOpen = isForJekyll ? "{:target=\"_blank\"}" : ""

    text = "\r\n\r\n\r\n"
    text += "**This [post](#{postURL})#{jekyllOpen} is behind Medium's paywall, View the full [post](#{postURL})#{jekyllOpen} on Medium, converted by [ZMediumToMarkdown](https://github.com/ZhgChgLi/ZMediumToMarkdown)#{jekyllOpen}.**"
    text += "\r\n"

    text
end

.createWatermark(postURL, isForJekyll) ⇒ Object 



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# File 'lib/Helper.rb', line 209

def self.createWatermark(postURL, isForJekyll)
    jekyllOpen = isForJekyll ? "{:target=\"_blank\"}" : ""

    text = "\r\n\r\n\r\n"
    text += "_[Post](#{postURL})#{jekyllOpen} converted from Medium by [ZMediumToMarkdown](https://github.com/ZhgChgLi/ZMediumToMarkdown)#{jekyllOpen}._"
    text += "\r\n"

    text
end

.downloadLatestVersion ⇒ Object 



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# File 'lib/Helper.rb', line 101

def self.downloadLatestVersion()
    rootPath = File.expand_path('../', File.dirname(__FILE__))

    if File.file?("#{rootPath}/ZMediumToMarkdown.gemspec")
        apiPath = 'https://api.github.com/repos/ZhgChgLi/ZMediumToMarkdown/releases'
        releases = JSON.parse(Request.URL(apiPath).body)
        version = latestStableRelease(releases)
        return if version.nil?

        zipFilePath = version["zipball_url"]
        puts "Downloading latest version from github..."
        URI.open('latest.zip', 'wb') do |fo|
            fo.print URI.open(zipFilePath).read
        end

        puts "Unzip..."
        Zip::File.open("latest.zip") do |zipfile|
            zipfile.each do |file|
                fileNames = file.name.split("/")
                fileNames.shift
                filePath = fileNames.join("/")
                if filePath != ''
                    puts "Unzip...#{filePath}"
                    zipfile.extract(file, filePath) { true }
                end
            end
        end
        File.delete("latest.zip")

        puts "Update to version #{version["tag_name"]} successfully!"
    else
        system("gem update ZMediumToMarkdown")
    end
end

.escapeHTML(text, toHTMLEntity = true) ⇒ Object 



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# File 'lib/Helper.rb', line 70

def self.escapeHTML(text, toHTMLEntity = true)
    if toHTMLEntity
        text = text.gsub('<', '&lt;').gsub('>', '&gt;')
    else
        text = text.gsub('<', '\<').gsub('>', '\>')
    end
    text
end

.escapeMarkdown(text) ⇒ Object

Escape characters that always have inline markdown meaning. Used for standalone text snippets (e.g. fallback embed titles) where there is no surrounding paragraph context.



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# File 'lib/Helper.rb', line 44

def self.escapeMarkdown(text)
    text.gsub(INLINE_MARKDOWN_ESCAPE_REGEX) { |c| "\\#{c}" }
end

.fetchOGImage(url) ⇒ Object 



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# File 'lib/Helper.rb', line 25

def self.fetchOGImage(url)
    html = Request.html(Request.URL(url))
    return "" unless html
    image = html.search("meta[property='og:image']").first
    return "" unless image
    content = (image['content'] || '').to_s.strip
    return "" if content.empty?
    # Resolve relative `og:image` paths (e.g. `/assets/og.png`) against the
    # source page so downstream consumers get a usable absolute URL.
    begin
        URI.join(url, content).to_s
    rescue URI::InvalidURIError, ArgumentError
        content
    end
end

.getLocalVersion ⇒ Object 



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# File 'lib/Helper.rb', line 185

def self.getLocalVersion()
    rootPath = File.expand_path('../', File.dirname(__FILE__))

    result = nil
    if File.file?("#{rootPath}/ZMediumToMarkdown.gemspec")
        gemspecContent = File.read("#{rootPath}/ZMediumToMarkdown.gemspec")
        result = gemspecContent[/(gem\.version){1}\s+(\=)\s+(\'){1}(\d+(\.){1}\d+(\.){1}\d+){1}(\'){1}/, 4]
    else
        result = Gem.loaded_specs["ZMediumToMarkdown"].version.version
    end

    result.nil? ? nil : Gem::Version.new(result)
end

.getRemoteVersionFromGithub ⇒ Object 



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# File 'lib/Helper.rb', line 199

def self.getRemoteVersionFromGithub()
    apiPath = 'https://api.github.com/repos/ZhgChgLi/ZMediumToMarkdown/releases'
    releases = JSON.parse(Request.URL(apiPath).body)
    version = latestStableRelease(releases)
    return nil if version.nil?

    tagName = version["tag_name"].to_s.downcase.gsub('v', '')
    Gem::Version.new(tagName)
end

.latestStableRelease(releases) ⇒ Object

Pick the latest non-prerelease release from the GitHub releases JSON. Returns nil if ‘releases` isn’t a list (e.g. a rate-limit error body).



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# File 'lib/Helper.rb', line 96

def self.latestStableRelease(releases)
    return nil unless releases.is_a?(Array)
    releases.sort { |a, b| b["id"] <=> a["id"] }.find { |v| v["prerelease"] == false }
end

.makeWarningText(message) ⇒ Object 



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# File 'lib/Helper.rb', line 84

def self.makeWarningText(message)
    puts "####################################################\n"
    puts "#WARNING:\n"
    puts "##{message}\n"
    puts "#--------------------------------------------------#\n"
    puts "#Please feel free to open an Issue or submit a fix/contribution via Pull Request on:\n"
    puts "#https://github.com/ZhgChgLi/ZMediumToMarkdown\n"
    puts "####################################################\n"
end

.markdownEscapeNeeded?(char, precedingChars) ⇒ Boolean

Returns true if ‘char` at this position would be re-interpreted as markdown when emitted as-is.

‘precedingChars` is the array of chars (in original order) that appear before `char` in the same paragraph — needed to detect the ordered-list pattern `<digits>.` / `<digits>)` at line start.

Returns:

  • (Boolean) 


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# File 'lib/Helper.rb', line 54

def self.markdownEscapeNeeded?(char, precedingChars)
    return true if INLINE_MARKDOWN_ESCAPE_CHARS.include?(char)

    if precedingChars.empty?
        # Block-level marker at the very start of the paragraph.
        return LINE_START_ESCAPE_CHARS.include?(char)
    end

    # Ordered-list marker: only when the entire prefix is digits.
    if (char == '.' || char == ')') && precedingChars.all? { |c| c.match?(/\d/) }
        return true
    end

    false
end

.printNewVersionMessageIfExists ⇒ Object 



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# File 'lib/Helper.rb', line 172

def self.printNewVersionMessageIfExists()
    remote = Helper.getRemoteVersionFromGithub()
    local  = Helper.getLocalVersion()
    return if remote.nil? || local.nil?

    if remote > local
        puts "##########################################################"
        puts "#####           New Version Available!!!             #####"
        puts "##### Please type `ZMediumToMarkdown -n` to update!! #####"
        puts "##########################################################"
    end
end