defmodule Mailman.Attachment do
  @moduledoc "A struct defining an attachable file. It automatically detect the mime type based on file extension."

  defstruct file_name: "",
    mime_type: "",
    mime_sub_type: "",
    data: ""

  @mime_types [
    { ".3dm", "x-world/x-3dmf" },
    { ".3dmf", "x-world/x-3dmf" },
    { ".a", "application/octet-stream" },
    { ".aab", "application/x-authorware-bin" },
    { ".aam", "application/x-authorware-map" },
    { ".aas", "application/x-authorware-seg" },
    { ".abc", "text/vnd.abc" },
    { ".acgi", "text/html" },
    { ".afl", "video/animaflex" },
    { ".ai", "application/postscript" },
    { ".aif", "audio/aiff" },
    { ".aif", "audio/x-aiff" },
    { ".aifc", "audio/aiff" },
    { ".aifc", "audio/x-aiff" },
    { ".aiff", "audio/aiff" },
    { ".aiff", "audio/x-aiff" },
    { ".aim", "application/x-aim" },
    { ".aip", "text/x-audiosoft-intra" },
    { ".ani", "application/x-navi-animation" },
    { ".aos", "application/x-nokia-9000-communicator-add-on-software" },
    { ".aps", "application/mime" },
    { ".arc", "application/octet-stream" },
    { ".arj", "application/arj" },
    { ".arj", "application/octet-stream" },
    { ".art", "image/x-jg" },
    { ".asf", "video/x-ms-asf" },
    { ".asm", "text/x-asm" },
    { ".asp", "text/asp" },
    { ".asx", "application/x-mplayer2" },
    { ".asx", "video/x-ms-asf" },
    { ".asx", "video/x-ms-asf-plugin" },
    { ".au", "audio/basic" },
    { ".au", "audio/x-au" },
    { ".avi", "application/x-troff-msvideo" },
    { ".avi", "video/avi" },
    { ".avi", "video/msvideo" },
    { ".avi", "video/x-msvideo" },
    { ".avs", "video/avs-video" },
    { ".bcpio", "application/x-bcpio" },
    { ".bin", "application/mac-binary" },
    { ".bin", "application/macbinary" },
    { ".bin", "application/octet-stream" },
    { ".bin", "application/x-binary" },
    { ".bin", "application/x-macbinary" },
    { ".bm", "image/bmp" },
    { ".bmp", "image/bmp" },
    { ".bmp", "image/x-windows-bmp" },
    { ".boo", "application/book" },
    { ".book", "application/book" },
    { ".boz", "application/x-bzip2" },
    { ".bsh", "application/x-bsh" },
    { ".bz", "application/x-bzip" },
    { ".bz2", "application/x-bzip2" },
    { ".c", "text/plain" },
    { ".c", "text/x-c" },
    { ".c++", "text/plain" },
    { ".cat", "application/vnd.ms-pki.seccat" },
    { ".cc", "text/plain" },
    { ".cc", "text/x-c" },
    { ".ccad", "application/clariscad" },
    { ".cco", "application/x-cocoa" },
    { ".cdf", "application/cdf" },
    { ".cdf", "application/x-cdf" },
    { ".cdf", "application/x-netcdf" },
    { ".cer", "application/pkix-cert" },
    { ".cer", "application/x-x509-ca-cert" },
    { ".cha", "application/x-chat" },
    { ".chat", "application/x-chat" },
    { ".class", "application/java" },
    { ".class", "application/java-byte-code" },
    { ".class", "application/x-java-class" },
    { ".com", "application/octet-stream" },
    { ".com", "text/plain" },
    { ".conf", "text/plain" },
    { ".cpio", "application/x-cpio" },
    { ".cpp", "text/x-c" },
    { ".cpt", "application/mac-compactpro" },
    { ".cpt", "application/x-compactpro" },
    { ".cpt", "application/x-cpt" },
    { ".crl", "application/pkcs-crl" },
    { ".crl", "application/pkix-crl" },
    { ".crt", "application/pkix-cert" },
    { ".crt", "application/x-x509-ca-cert" },
    { ".crt", "application/x-x509-user-cert" },
    { ".csh", "application/x-csh" },
    { ".csh", "text/x-script.csh" },
    { ".css", "application/x-pointplus" },
    { ".css", "text/css" },
    { ".cxx", "text/plain" },
    { ".dcr", "application/x-director" },
    { ".deepv", "application/x-deepv" },
    { ".def", "text/plain" },
    { ".der", "application/x-x509-ca-cert" },
    { ".dif", "video/x-dv" },
    { ".dir", "application/x-director" },
    { ".dl", "video/dl" },
    { ".dl", "video/x-dl" },
    { ".doc", "application/msword" },
    { ".dot", "application/msword" },
    { ".dp", "application/commonground" },
    { ".drw", "application/drafting" },
    { ".dump", "application/octet-stream" },
    { ".dv", "video/x-dv" },
    { ".dvi", "application/x-dvi" },
    { ".dwf", "drawing/x-dwf, (old)" },
    { ".dwf", "model/vnd.dwf" },
    { ".dwg", "application/acad" },
    { ".dwg", "image/vnd.dwg" },
    { ".dwg", "image/x-dwg" },
    { ".dxf", "application/dxf" },
    { ".dxf", "image/vnd.dwg" },
    { ".dxf", "image/x-dwg" },
    { ".dxr", "application/x-director" },
    { ".el", "text/x-script.elisp" },
    { ".elc", "application/x-bytecode.elisp, (compiled, elisp)" },
    { ".elc", "application/x-elc" },
    { ".env", "application/x-envoy" },
    { ".eps", "application/postscript" },
    { ".es", "application/x-esrehber" },
    { ".etx", "text/x-setext" },
    { ".evy", "application/envoy" },
    { ".evy", "application/x-envoy" },
    { ".exe", "application/octet-stream" },
    { ".f", "text/plain" },
    { ".f", "text/x-fortran" },
    { ".f77", "text/x-fortran" },
    { ".f90", "text/plain" },
    { ".f90", "text/x-fortran" },
    { ".fdf", "application/vnd.fdf" },
    { ".fif", "application/fractals" },
    { ".fif", "image/fif" },
    { ".fli", "video/fli" },
    { ".fli", "video/x-fli" },
    { ".flo", "image/florian" },
    { ".flx", "text/vnd.fmi.flexstor" },
    { ".fmf", "video/x-atomic3d-feature" },
    { ".for", "text/plain" },
    { ".for", "text/x-fortran" },
    { ".fpx", "image/vnd.fpx" },
    { ".fpx", "image/vnd.net-fpx" },
    { ".frl", "application/freeloader" },
    { ".funk", "audio/make" },
    { ".g", "text/plain" },
    { ".g3", "image/g3fax" },
    { ".gif", "image/gif" },
    { ".gl", "video/gl" },
    { ".gl", "video/x-gl" },
    { ".gsd", "audio/x-gsm" },
    { ".gsm", "audio/x-gsm" },
    { ".gsp", "application/x-gsp" },
    { ".gss", "application/x-gss" },
    { ".gtar", "application/x-gtar" },
    { ".gz", "application/x-compressed" },
    { ".gz", "application/x-gzip" },
    { ".gzip", "application/x-gzip" },
    { ".gzip", "multipart/x-gzip" },
    { ".h", "text/plain" },
    { ".h", "text/x-h" },
    { ".hdf", "application/x-hdf" },
    { ".help", "application/x-helpfile" },
    { ".hgl", "application/vnd.hp-hpgl" },
    { ".hh", "text/plain" },
    { ".hh", "text/x-h" },
    { ".hlb", "text/x-script" },
    { ".hlp", "application/hlp" },
    { ".hlp", "application/x-helpfile" },
    { ".hlp", "application/x-winhelp" },
    { ".hpg", "application/vnd.hp-hpgl" },
    { ".hpgl", "application/vnd.hp-hpgl" },
    { ".hqx", "application/binhex" },
    { ".hqx", "application/binhex4" },
    { ".hqx", "application/mac-binhex" },
    { ".hqx", "application/mac-binhex40" },
    { ".hqx", "application/x-binhex40" },
    { ".hqx", "application/x-mac-binhex40" },
    { ".hta", "application/hta" },
    { ".htc", "text/x-component" },
    { ".htm", "text/html" },
    { ".html", "text/html" },
    { ".htmls", "text/html" },
    { ".htt", "text/webviewhtml" },
    { ".htx", "text/html" },
    { ".ice", "x-conference/x-cooltalk" },
    { ".ico", "image/x-icon" },
    { ".idc", "text/plain" },
    { ".ief", "image/ief" },
    { ".iefs", "image/ief" },
    { ".iges", "application/iges" },
    { ".iges", "model/iges" },
    { ".igs", "application/iges" },
    { ".igs", "model/iges" },
    { ".ima", "application/x-ima" },
    { ".imap", "application/x-httpd-imap" },
    { ".inf", "application/inf" },
    { ".ins", "application/x-internett-signup" },
    { ".ip", "application/x-ip2" },
    { ".isu", "video/x-isvideo" },
    { ".it", "audio/it" },
    { ".iv", "application/x-inventor" },
    { ".ivr", "i-world/i-vrml" },
    { ".ivy", "application/x-livescreen" },
    { ".jam", "audio/x-jam" },
    { ".jav", "text/plain" },
    { ".jav", "text/x-java-source" },
    { ".java", "text/plain" },
    { ".java", "text/x-java-source" },
    { ".jcm", "application/x-java-commerce" },
    { ".jfif", "image/jpeg" },
    { ".jfif", "image/pjpeg" },
    { ".jfif-tbnl", "image/jpeg" },
    { ".jpe", "image/jpeg" },
    { ".jpe", "image/pjpeg" },
    { ".jpeg", "image/jpeg" },
    { ".jpeg", "image/pjpeg" },
    { ".jpg", "image/jpeg" },
    { ".jpg", "image/pjpeg" },
    { ".jps", "image/x-jps" },
    { ".js", "application/x-javascript" },
    { ".js", "application/javascript" },
    { ".js", "application/ecmascript" },
    { ".js", "text/javascript" },
    { ".js", "text/ecmascript" },
    { ".jut", "image/jutvision" },
    { ".kar", "audio/midi" },
    { ".kar", "music/x-karaoke" },
    { ".ksh", "application/x-ksh" },
    { ".ksh", "text/x-script.ksh" },
    { ".la", "audio/nspaudio" },
    { ".la", "audio/x-nspaudio" },
    { ".lam", "audio/x-liveaudio" },
    { ".latex", "application/x-latex" },
    { ".lha", "application/lha" },
    { ".lha", "application/octet-stream" },
    { ".lha", "application/x-lha" },
    { ".lhx", "application/octet-stream" },
    { ".list", "text/plain" },
    { ".lma", "audio/nspaudio" },
    { ".lma", "audio/x-nspaudio" },
    { ".log", "text/plain" },
    { ".lsp", "application/x-lisp" },
    { ".lsp", "text/x-script.lisp" },
    { ".lst", "text/plain" },
    { ".lsx", "text/x-la-asf" },
    { ".ltx", "application/x-latex" },
    { ".lzh", "application/octet-stream" },
    { ".lzh", "application/x-lzh" },
    { ".lzx", "application/lzx" },
    { ".lzx", "application/octet-stream" },
    { ".lzx", "application/x-lzx" },
    { ".m", "text/plain" },
    { ".m", "text/x-m" },
    { ".m1v", "video/mpeg" },
    { ".m2a", "audio/mpeg" },
    { ".m2v", "video/mpeg" },
    { ".m3u", "audio/x-mpequrl" },
    { ".man", "application/x-troff-man" },
    { ".map", "application/x-navimap" },
    { ".mar", "text/plain" },
    { ".mbd", "application/mbedlet" },
    { ".mc$", "application/x-magic-cap-package-1.0" },
    { ".mcd", "application/mcad" },
    { ".mcd", "application/x-mathcad" },
    { ".mcf", "image/vasa" },
    { ".mcf", "text/mcf" },
    { ".mcp", "application/netmc" },
    { ".me", "application/x-troff-me" },
    { ".mht", "message/rfc822" },
    { ".mhtml", "message/rfc822" },
    { ".mid", "application/x-midi" },
    { ".mid", "audio/midi" },
    { ".mid", "audio/x-mid" },
    { ".mid", "audio/x-midi" },
    { ".mid", "music/crescendo" },
    { ".mid", "x-music/x-midi" },
    { ".midi", "application/x-midi" },
    { ".midi", "audio/midi" },
    { ".midi", "audio/x-mid" },
    { ".midi", "audio/x-midi" },
    { ".midi", "music/crescendo" },
    { ".midi", "x-music/x-midi" },
    { ".mif", "application/x-frame" },
    { ".mif", "application/x-mif" },
    { ".mime", "message/rfc822" },
    { ".mime", "www/mime" },
    { ".mjf", "audio/x-vnd.audioexplosion.mjuicemediafile" },
    { ".mjpg", "video/x-motion-jpeg" },
    { ".mm", "application/base64" },
    { ".mm", "application/x-meme" },
    { ".mme", "application/base64" },
    { ".mod", "audio/mod" },
    { ".mod", "audio/x-mod" },
    { ".moov", "video/quicktime" },
    { ".mov", "video/quicktime" },
    { ".movie", "video/x-sgi-movie" },
    { ".mobileconfig", "application/x-apple-aspen-config" },
    { ".mp2", "audio/mpeg" },
    { ".mp2", "audio/x-mpeg" },
    { ".mp2", "video/mpeg" },
    { ".mp2", "video/x-mpeg" },
    { ".mp2", "video/x-mpeq2a" },
    { ".mp3", "audio/mpeg3" },
    { ".mp3", "audio/x-mpeg-3" },
    { ".mp3", "video/mpeg" },
    { ".mp3", "video/x-mpeg" },
    { ".mpa", "audio/mpeg" },
    { ".mpa", "video/mpeg" },
    { ".mpc", "application/x-project" },
    { ".mpe", "video/mpeg" },
    { ".mpeg", "video/mpeg" },
    { ".mpg", "audio/mpeg" },
    { ".mpg", "video/mpeg" },
    { ".mpga", "audio/mpeg" },
    { ".mpp", "application/vnd.ms-project" },
    { ".mpt", "application/x-project" },
    { ".mpv", "application/x-project" },
    { ".mpx", "application/x-project" },
    { ".mrc", "application/marc" },
    { ".ms", "application/x-troff-ms" },
    { ".mv", "video/x-sgi-movie" },
    { ".my", "audio/make" },
    { ".mzz", "application/x-vnd.audioexplosion.mzz" },
    { ".nap", "image/naplps" },
    { ".naplps", "image/naplps" },
    { ".nc", "application/x-netcdf" },
    { ".ncm", "application/vnd.nokia.configuration-message" },
    { ".nif", "image/x-niff" },
    { ".niff", "image/x-niff" },
    { ".nix", "application/x-mix-transfer" },
    { ".nsc", "application/x-conference" },
    { ".nvd", "application/x-navidoc" },
    { ".o", "application/octet-stream" },
    { ".oda", "application/oda" },
    { ".omc", "application/x-omc" },
    { ".omcd", "application/x-omcdatamaker" },
    { ".omcr", "application/x-omcregerator" },
    { ".p", "text/x-pascal" },
    { ".p10", "application/pkcs10" },
    { ".p10", "application/x-pkcs10" },
    { ".p12", "application/pkcs-12" },
    { ".p12", "application/x-pkcs12" },
    { ".p7a", "application/x-pkcs7-signature" },
    { ".p7c", "application/pkcs7-mime" },
    { ".p7c", "application/x-pkcs7-mime" },
    { ".p7m", "application/pkcs7-mime" },
    { ".p7m", "application/x-pkcs7-mime" },
    { ".p7r", "application/x-pkcs7-certreqresp" },
    { ".p7s", "application/pkcs7-signature" },
    { ".part", "application/pro_eng" },
    { ".pas", "text/pascal" },
    { ".pbm", "image/x-portable-bitmap" },
    { ".pcl", "application/vnd.hp-pcl" },
    { ".pcl", "application/x-pcl" },
    { ".pct", "image/x-pict" },
    { ".pcx", "image/x-pcx" },
    { ".pdb", "chemical/x-pdb" },
    { ".pdf", "application/pdf" },
    { ".pfunk", "audio/make" },
    { ".pfunk", "audio/make.my.funk" },
    { ".pgm", "image/x-portable-graymap" },
    { ".pgm", "image/x-portable-greymap" },
    { ".pic", "image/pict" },
    { ".pict", "image/pict" },
    { ".pkg", "application/x-newton-compatible-pkg" },
    { ".pko", "application/vnd.ms-pki.pko" },
    { ".pl", "text/plain" },
    { ".pl", "text/x-script.perl" },
    { ".plx", "application/x-pixclscript" },
    { ".pm", "image/x-xpixmap" },
    { ".pm", "text/x-script.perl-module" },
    { ".pm4", "application/x-pagemaker" },
    { ".pm5", "application/x-pagemaker" },
    { ".png", "image/png" },
    { ".pnm", "application/x-portable-anymap" },
    { ".pnm", "image/x-portable-anymap" },
    { ".pot", "application/mspowerpoint" },
    { ".pot", "application/vnd.ms-powerpoint" },
    { ".pov", "model/x-pov" },
    { ".ppa", "application/vnd.ms-powerpoint" },
    { ".ppm", "image/x-portable-pixmap" },
    { ".pps", "application/mspowerpoint" },
    { ".pps", "application/vnd.ms-powerpoint" },
    { ".ppt", "application/mspowerpoint" },
    { ".ppt", "application/powerpoint" },
    { ".ppt", "application/vnd.ms-powerpoint" },
    { ".ppt", "application/x-mspowerpoint" },
    { ".ppz", "application/mspowerpoint" },
    { ".pre", "application/x-freelance" },
    { ".prt", "application/pro_eng" },
    { ".ps", "application/postscript" },
    { ".psd", "application/octet-stream" },
    { ".pvu", "paleovu/x-pv" },
    { ".pwz", "application/vnd.ms-powerpoint" },
    { ".py", "text/x-script.phyton" },
    { ".pyc", "applicaiton/x-bytecode.python" },
    { ".qcp", "audio/vnd.qcelp" },
    { ".qd3", "x-world/x-3dmf" },
    { ".qd3d", "x-world/x-3dmf" },
    { ".qif", "image/x-quicktime" },
    { ".qt", "video/quicktime" },
    { ".qtc", "video/x-qtc" },
    { ".qti", "image/x-quicktime" },
    { ".qtif", "image/x-quicktime" },
    { ".ra", "audio/x-pn-realaudio" },
    { ".ra", "audio/x-pn-realaudio-plugin" },
    { ".ra", "audio/x-realaudio" },
    { ".ram", "audio/x-pn-realaudio" },
    { ".ras", "application/x-cmu-raster" },
    { ".ras", "image/cmu-raster" },
    { ".ras", "image/x-cmu-raster" },
    { ".rast", "image/cmu-raster" },
    { ".rexx", "text/x-script.rexx" },
    { ".rf", "image/vnd.rn-realflash" },
    { ".rgb", "image/x-rgb" },
    { ".rm", "application/vnd.rn-realmedia" },
    { ".rm", "audio/x-pn-realaudio" },
    { ".rmi", "audio/mid" },
    { ".rmm", "audio/x-pn-realaudio" },
    { ".rmp", "audio/x-pn-realaudio" },
    { ".rmp", "audio/x-pn-realaudio-plugin" },
    { ".rng", "application/ringing-tones" },
    { ".rng", "application/vnd.nokia.ringing-tone" },
    { ".rnx", "application/vnd.rn-realplayer" },
    { ".roff", "application/x-troff" },
    { ".rp", "image/vnd.rn-realpix" },
    { ".rpm", "audio/x-pn-realaudio-plugin" },
    { ".rt", "text/richtext" },
    { ".rt", "text/vnd.rn-realtext" },
    { ".rtf", "application/rtf" },
    { ".rtf", "application/x-rtf" },
    { ".rtf", "text/richtext" },
    { ".rtx", "application/rtf" },
    { ".rtx", "text/richtext" },
    { ".rv", "video/vnd.rn-realvideo" },
    { ".s", "text/x-asm" },
    { ".s3m", "audio/s3m" },
    { ".saveme", "application/octet-stream" },
    { ".sbk", "application/x-tbook" },
    { ".scm", "application/x-lotusscreencam" },
    { ".scm", "text/x-script.guile" },
    { ".scm", "text/x-script.scheme" },
    { ".scm", "video/x-scm" },
    { ".sdml", "text/plain" },
    { ".sdp", "application/sdp" },
    { ".sdp", "application/x-sdp" },
    { ".sdr", "application/sounder" },
    { ".sea", "application/sea" },
    { ".sea", "application/x-sea" },
    { ".set", "application/set" },
    { ".sgm", "text/sgml" },
    { ".sgm", "text/x-sgml" },
    { ".sgml", "text/sgml" },
    { ".sgml", "text/x-sgml" },
    { ".sh", "application/x-bsh" },
    { ".sh", "application/x-sh" },
    { ".sh", "application/x-shar" },
    { ".sh", "text/x-script.sh" },
    { ".shar", "application/x-bsh" },
    { ".shar", "application/x-shar" },
    { ".shtml", "text/html" },
    { ".shtml", "text/x-server-parsed-html" },
    { ".sid", "audio/x-psid" },
    { ".sit", "application/x-sit" },
    { ".sit", "application/x-stuffit" },
    { ".skd", "application/x-koan" },
    { ".skm", "application/x-koan" },
    { ".skp", "application/x-koan" },
    { ".skt", "application/x-koan" },
    { ".sl", "application/x-seelogo" },
    { ".smi", "application/smil" },
    { ".smil", "application/smil" },
    { ".snd", "audio/basic" },
    { ".snd", "audio/x-adpcm" },
    { ".sol", "application/solids" },
    { ".spc", "application/x-pkcs7-certificates" },
    { ".spc", "text/x-speech" },
    { ".spl", "application/futuresplash" },
    { ".spr", "application/x-sprite" },
    { ".sprite", "application/x-sprite" },
    { ".src", "application/x-wais-source" },
    { ".ssi", "text/x-server-parsed-html" },
    { ".ssm", "application/streamingmedia" },
    { ".sst", "application/vnd.ms-pki.certstore" },
    { ".step", "application/step" },
    { ".stl", "application/sla" },
    { ".stl", "application/vnd.ms-pki.stl" },
    { ".stl", "application/x-navistyle" },
    { ".stp", "application/step" },
    { ".sv4cpio", "application/x-sv4cpio" },
    { ".sv4crc", "application/x-sv4crc" },
    { ".svf", "image/vnd.dwg" },
    { ".svf", "image/x-dwg" },
    { ".svr", "application/x-world" },
    { ".svr", "x-world/x-svr" },
    { ".swf", "application/x-shockwave-flash" },
    { ".t", "application/x-troff" },
    { ".talk", "text/x-speech" },
    { ".tar", "application/x-tar" },
    { ".tbk", "application/toolbook" },
    { ".tbk", "application/x-tbook" },
    { ".tcl", "application/x-tcl" },
    { ".tcl", "text/x-script.tcl" },
    { ".tcsh", "text/x-script.tcsh" },
    { ".tex", "application/x-tex" },
    { ".texi", "application/x-texinfo" },
    { ".texinfo", "application/x-texinfo" },
    { ".text", "application/plain" },
    { ".text", "text/plain" },
    { ".tgz", "application/gnutar" },
    { ".tgz", "application/x-compressed" },
    { ".tif", "image/tiff" },
    { ".tif", "image/x-tiff" },
    { ".tiff", "image/tiff" },
    { ".tiff", "image/x-tiff" },
    { ".tr", "application/x-troff" },
    { ".tsi", "audio/tsp-audio" },
    { ".tsp", "application/dsptype" },
    { ".tsp", "audio/tsplayer" },
    { ".tsv", "text/tab-separated-values" },
    { ".turbot", "image/florian" },
    { ".txt", "text/plain" },
    { ".uil", "text/x-uil" },
    { ".uni", "text/uri-list" },
    { ".unis", "text/uri-list" },
    { ".unv", "application/i-deas" },
    { ".uri", "text/uri-list" },
    { ".uris", "text/uri-list" },
    { ".ustar", "application/x-ustar" },
    { ".ustar", "multipart/x-ustar" },
    { ".uu", "application/octet-stream" },
    { ".uu", "text/x-uuencode" },
    { ".uue", "text/x-uuencode" },
    { ".vcd", "application/x-cdlink" },
    { ".vcs", "text/x-vcalendar" },
    { ".vda", "application/vda" },
    { ".vdo", "video/vdo" },
    { ".vew", "application/groupwise" },
    { ".viv", "video/vivo" },
    { ".viv", "video/vnd.vivo" },
    { ".vivo", "video/vivo" },
    { ".vivo", "video/vnd.vivo" },
    { ".vmd", "application/vocaltec-media-desc" },
    { ".vmf", "application/vocaltec-media-file" },
    { ".voc", "audio/voc" },
    { ".voc", "audio/x-voc" },
    { ".vos", "video/vosaic" },
    { ".vox", "audio/voxware" },
    { ".vqe", "audio/x-twinvq-plugin" },
    { ".vqf", "audio/x-twinvq" },
    { ".vql", "audio/x-twinvq-plugin" },
    { ".vrml", "application/x-vrml" },
    { ".vrml", "model/vrml" },
    { ".vrml", "x-world/x-vrml" },
    { ".vrt", "x-world/x-vrt" },
    { ".vsd", "application/x-visio" },
    { ".vst", "application/x-visio" },
    { ".vsw", "application/x-visio" },
    { ".w60", "application/wordperfect6.0" },
    { ".w61", "application/wordperfect6.1" },
    { ".w6w", "application/msword" },
    { ".wav", "audio/wav" },
    { ".wav", "audio/x-wav" },
    { ".wb1", "application/x-qpro" },
    { ".wbmp", "image/vnd.wap.wbmp" },
    { ".web", "application/vnd.xara" },
    { ".wiz", "application/msword" },
    { ".wk1", "application/x-123" },
    { ".wmf", "windows/metafile" },
    { ".wml", "text/vnd.wap.wml" },
    { ".wmlc", "application/vnd.wap.wmlc" },
    { ".wmls", "text/vnd.wap.wmlscript" },
    { ".wmlsc", "application/vnd.wap.wmlscriptc" },
    { ".word", "application/msword" },
    { ".wp", "application/wordperfect" },
    { ".wp5", "application/wordperfect" },
    { ".wp5", "application/wordperfect6.0" },
    { ".wp6", "application/wordperfect" },
    { ".wpd", "application/wordperfect" },
    { ".wpd", "application/x-wpwin" },
    { ".wq1", "application/x-lotus" },
    { ".wri", "application/mswrite" },
    { ".wri", "application/x-wri" },
    { ".wrl", "application/x-world" },
    { ".wrl", "model/vrml" },
    { ".wrl", "x-world/x-vrml" },
    { ".wrz", "model/vrml" },
    { ".wrz", "x-world/x-vrml" },
    { ".wsc", "text/scriplet" },
    { ".wsrc", "application/x-wais-source" },
    { ".wtk", "application/x-wintalk" },
    { ".xbm", "image/x-xbitmap" },
    { ".xbm", "image/x-xbm" },
    { ".xbm", "image/xbm" },
    { ".xdr", "video/x-amt-demorun" },
    { ".xgz", "xgl/drawing" },
    { ".xif", "image/vnd.xiff" },
    { ".xl", "application/excel" },
    { ".xla", "application/excel" },
    { ".xla", "application/x-excel" },
    { ".xla", "application/x-msexcel" },
    { ".xlb", "application/excel" },
    { ".xlb", "application/vnd.ms-excel" },
    { ".xlb", "application/x-excel" },
    { ".xlc", "application/excel" },
    { ".xlc", "application/vnd.ms-excel" },
    { ".xlc", "application/x-excel" },
    { ".xld", "application/excel" },
    { ".xld", "application/x-excel" },
    { ".xlk", "application/excel" },
    { ".xlk", "application/x-excel" },
    { ".xll", "application/excel" },
    { ".xll", "application/vnd.ms-excel" },
    { ".xll", "application/x-excel" },
    { ".xlm", "application/excel" },
    { ".xlm", "application/vnd.ms-excel" },
    { ".xlm", "application/x-excel" },
    { ".xls", "application/excel" },
    { ".xls", "application/vnd.ms-excel" },
    { ".xls", "application/x-excel" },
    { ".xls", "application/x-msexcel" },
    { ".xlt", "application/excel" },
    { ".xlt", "application/x-excel" },
    { ".xlv", "application/excel" },
    { ".xlv", "application/x-excel" },
    { ".xlw", "application/excel" },
    { ".xlw", "application/vnd.ms-excel" },
    { ".xlw", "application/x-excel" },
    { ".xlw", "application/x-msexcel" },
    { ".xm", "audio/xm" },
    { ".xml", "application/xml" },
    { ".xml", "text/xml" },
    { ".xmz", "xgl/movie" },
    { ".xpix", "application/x-vnd.ls-xpix" },
    { ".xpm", "image/x-xpixmap" },
    { ".xpm", "image/xpm" },
    { ".x-png", "image/png" },
    { ".xsr", "video/x-amt-showrun" },
    { ".xwd", "image/x-xwd" },
    { ".xwd", "image/x-xwindowdump" },
    { ".xyz", "chemical/x-pdb" },
    { ".z", "application/x-compress" },
    { ".z", "application/x-compressed" },
    { ".zip", "application/x-compressed" },
    { ".zip", "application/x-zip-compressed" },
    { ".zip", "application/zip" },
    { ".zip", "multipart/x-zip" },
    { ".zoo", "application/octet-stream" },
    { ".zsh", "text/x-script.zsh" }
    ]


  @doc "Get the attachment struct for given by path file from the file system"
  def inline(file_path, file_name \\ nil) do
    case file_path |> Path.expand |> File.read do
      { :ok, data } ->
        {
          :ok,
          %Mailman.Attachment{
            file_name: file_name || Path.basename(file_path),
            mime_type: mime_type_for_path(file_path),
            mime_sub_type: mime_sub_type_for_path(file_path),
            data: data
          }
        }
      { :error, message } -> { :error, message }
    end
  end

  @doc "Get the attachment struct for given by path file from the file system and throw an error if anything goes wrong."
  def inline!(file_path, file_name \\ nil) do
    case inline(file_path, file_name) do
      { :ok, attachment } -> attachment
      { :error, message } -> throw message
    end
  end

  def attach(url, file_name \\ nil) do
    case is_valid_url(url) do
      {:ok, uri} ->
        response = HTTPotion.get(url, [timeout: 60_000])
        case response.status_code do
          200 ->
            {
              :ok,
              %Mailman.Attachment{
                file_name: file_name || Path.basename(url),
                mime_type: mime_type_for_path(url),
                mime_sub_type: mime_sub_type_for_path(url),
                data: response.body
              }
            }
          _ -> {:error, "File not found"}
        end

      {:error, message} -> {:error, message}
    end
  end

  def attach!(url, file_name \\ nil) do
    case attach(url, file_name) do
      { :ok, attachment } -> attachment
      { :error, message } -> throw message
    end
  end

  def mime_full_for_path(path) do
    extension = Path.extname(path)
    type = Enum.find mime_types, fn({ext, _}) ->
      ext == extension
    end
    case type do
      nil -> "application/octet-stream"
      _   -> elem(type, 1)
    end
  end

  def mime_type_for_path(path) do
    mime_full_for_path(path) |>
      String.split("/") |>
      List.first
  end

  def mime_sub_type_for_path(path) do
    mime_full_for_path(path) |>
      String.split("/") |>
      List.last
  end

  def mime_types do
    @mime_types
  end

  def is_valid_url(str) do
    uri = URI.parse(str)

    result = case uri do
      %URI{scheme: nil} -> {:error, uri}
      %URI{host: nil} -> {:error, uri}
      %URI{path: nil} -> {:error, uri}
      uri -> {:ok, uri}
    end

    case result do
      {:ok, uri} -> :inet.gethostbyname(to_char_list uri.host)
      _ -> result
    end
  end
end