all repos — hastyscribe @ 36ccb49f685c6d030d158696d46c204006d326d0

A professional markdown compiler.

src/hastyscribepkg/utils.nim

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import
  std/base64,
  std/os,
  std/strutils,
  std/pegs

import
  consts

proc style_tag*(css: string): string =
  result = "<style>$1</style>" % [css]

proc style_link_tag*(css: string): string =
  result = "<link rel=\"stylesheet\" href=\"$1\"/>" % [css]

proc encode_image*(contents, format: string): string =
    if format == "svg":
      let encoded_svg = contents
        .replace("\"", "'")
        .replace("%", "%25")
        .replace("#", "%23")
        .replace("{", "%7B")
        .replace("}", "%7D")
        .replace("<", "%3C")
        .replace(">", "%3E")
        .replace(" ", "%20")
      return "data:image/svg+xml,$#" % [encoded_svg]
    else:
      return "data:image/$format;base64,$enc_contents" % ["format", format, "enc_contents", contents.encode]

proc encode_image_file*(file, format: string): string =
  if (file.fileExists):
    let contents = file.readFile
    return encode_image(contents, format)
  else:
    stderr.writeLine("Warning: image '" & file & "' not found.")
    return file

proc image_format*(imgfile: string): string =
  let peg_imgformat = peg"i'.png' / i'.jpg' / i'.jpeg' / i'.gif' / i'.svg' / i'.bmp' / i'.webp' @$"
  return imgfile.substr(imgfile.find(peg_imgformat)+1, imgfile.len-1)

proc watermark_css*(imgfile: string): string =
  if imgfile == "":
    result = ""
  else:
    let img = imgfile.encode_image_file(imgfile.image_format)
    result = (watermark_style % [img]).style_tag

proc add_jump_to_top_links*(document: string): string =
  result = document.replacef(peg"{'</h' [23456] '>'}", "<a href=\"#document-top\" title=\"Go to top\"></a>$1")