vcard.lua (2614B)
- -- Copyright (c) 2015-2024 Piotr Orzechowski [drzewo.org]. See LICENSE.
- -- vCard 2.1, 3.0 and 4.0 LPeg lexer.
- local lexer = require('lexer')
- local token, word_match = lexer.token, lexer.word_match
- local P, S = lpeg.P, lpeg.S
- local lex = lexer.new('vcard')
- -- Whitespace.
- lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
- -- Begin vCard, end vCard.
- lex:add_rule('begin_sequence', token(lexer.KEYWORD, 'BEGIN') * token(lexer.OPERATOR, ':') *
- token(lexer.COMMENT, 'VCARD'))
- lex:add_rule('end_sequence', token(lexer.KEYWORD, 'END') * token(lexer.OPERATOR, ':') *
- token(lexer.COMMENT, 'VCARD'))
- -- vCard version (in v3.0 and v4.0 must appear immediately after BEGIN:VCARD).
- lex:add_rule('version_sequence', token(lexer.KEYWORD, 'VERSION') * token(lexer.OPERATOR, ':') *
- token(lexer.CONSTANT, lexer.digit^1 * ('.' * lexer.digit^1)^-1))
- -- Required properties.
- local required_property = token(lexer.KEYWORD, word_match({
- 'BEGIN', 'END', 'FN', 'VERSION', --
- 'N' -- Not required in v4.0.
- }, true)) * #P(':')
- lex:add_rule('required_property', required_property)
- -- Supported properties.
- local supported_property = token(lexer.TYPE, word_match({
- 'ADR', 'BDAY', 'CATEGORIES', 'EMAIL', 'END', 'GEO', 'KEY', 'LOGO', 'NOTE', 'ORG', 'PHOTO', 'REV',
- 'ROLE', 'SOUND', 'SOURCE', 'TEL', 'TITLE', 'TZ', 'UID', 'URL',
- -- Supported in v4.0 only.
- 'ANNIVERSARY', 'CALADRURI', 'CALURI', 'CLIENTPIDMAP', 'FBURL', 'GENDER', 'KIND', 'LANG', 'MEMBER',
- 'RELATED', 'XML',
- -- Not supported in v4.0.
- 'AGENT', 'LABEL', 'MAILER', 'PROFILE', 'SORT-STRING',
- -- Supported in v3.0 only.
- 'CLASS', 'NAME',
- -- Not supported in v2.1.
- 'IMPP', 'NICKNAME', 'PRODID'
- }, true)) * #S(':;')
- lex:add_rule('supported_property', supported_property)
- -- Group and property.
- local identifier = lexer.alpha^1 * lexer.digit^0 * ('-' * lexer.alnum^1)^0
- local property = required_property + supported_property +
- lexer.token(lexer.TYPE, S('xX') * '-' * identifier) * #S(':;')
- lex:add_rule('group_sequence', token(lexer.CONSTANT, lexer.starts_line(identifier)) *
- token(lexer.OPERATOR, '.') * property)
- -- Extension.
- lex:add_rule('extension',
- token(lexer.TYPE, lexer.starts_line(S('xX') * '-' * identifier * #S(':;'))))
- -- Parameter.
- local parameter = (token(lexer.IDENTIFIER, lexer.starts_line(identifier)) +
- token(lexer.STRING, identifier)) * #S(':=')
- lex:add_rule('parameter', parameter)
- -- Operators.
- lex:add_rule('operator', token(lexer.OPERATOR, S('.:;=')))
- -- Data.
- lex:add_rule('data', token(lexer.IDENTIFIER, lexer.any))
- -- Fold points.
- lex:add_fold_point(lexer.KEYWORD, 'BEGIN', 'END')
- return lex