-- Copyright (c) 2015-2018 Piotr Orzechowski [drzewo.org]. See License.txt.
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-- vCard 2.1, 3.0 and 4.0 LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S = lpeg.P, lpeg.R, lpeg.S
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local M = {_NAME = 'vcard'}
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-- Whitespace.
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local ws = token(lexer.WHITESPACE, lexer.space^1)
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-- Required properties.
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local required_property = token(lexer.KEYWORD, word_match({
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'BEGIN', 'END', 'FN', 'N' --[[ Not required in v4.0. ]], 'VERSION'
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}, nil, true)) * #P(':')
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-- Supported properties.
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local supported_property = token(lexer.TYPE, word_match({
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'ADR', 'AGENT' --[[ Not supported in v4.0. ]],
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'ANNIVERSARY' --[[ Supported in v4.0 only. ]], 'BDAY',
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'CALADRURI' --[[ Supported in v4.0 only. ]],
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'CALURI' --[[ Supported in v4.0 only. ]], 'CATEGORIES',
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'CLASS' --[[ Supported in v3.0 only. ]],
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'CLIENTPIDMAP' --[[ Supported in v4.0 only. ]], 'EMAIL', 'END',
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'FBURL' --[[ Supported in v4.0 only. ]],
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'GENDER' --[[ Supported in v4.0 only. ]], 'GEO',
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'IMPP' --[[ Not supported in v2.1. ]], 'KEY',
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'KIND' --[[ Supported in v4.0 only. ]],
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'LABEL' --[[ Not supported in v4.0. ]],
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'LANG' --[[ Supported in v4.0 only. ]], 'LOGO',
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'MAILER' --[[ Not supported in v4.0. ]],
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'MEMBER' --[[ Supported in v4.0 only. ]],
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'NAME' --[[ Supported in v3.0 only. ]],
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'NICKNAME' --[[ Not supported in v2.1. ]], 'NOTE', 'ORG', 'PHOTO',
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'PRODID' --[[ Not supported in v2.1. ]],
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'PROFILE' --[[ Not supported in v4.0. ]],
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'RELATED' --[[ Supported in v4.0 only. ]], 'REV', 'ROLE',
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'SORT-STRING' --[[ Not supported in v4.0. ]], 'SOUND', 'SOURCE', 'TEL',
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'TITLE', 'TZ', 'UID', 'URL', 'XML' --[[ Supported in v4.0 only. ]]
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}, nil, true)) * #S(':;')
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local identifier = lexer.alpha^1 * lexer.digit^0 * (P('-') * lexer.alnum^1)^0
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-- Extension.
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local extension = token(lexer.TYPE, lexer.starts_line(S('xX') * P('-') *
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identifier * #S(':;')))
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-- Parameter.
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local parameter = token(lexer.IDENTIFIER,
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lexer.starts_line(identifier * #S(':='))) +
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token(lexer.STRING, identifier) * #S(':=')
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-- Operators.
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local operator = token(lexer.OPERATOR, S('.:;='))
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-- Group and property.
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local group_sequence = token(lexer.CONSTANT, lexer.starts_line(identifier)) *
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token(lexer.OPERATOR, P('.')) *
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(required_property + supported_property +
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lexer.token(lexer.TYPE, S('xX') * P('-') * identifier) *
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#S(':;'))
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-- Begin vCard, end vCard.
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local begin_sequence = token(lexer.KEYWORD, P('BEGIN')) *
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token(lexer.OPERATOR, P(':')) *
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token(lexer.COMMENT, P('VCARD'))
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local end_sequence = token(lexer.KEYWORD, P('END')) *
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token(lexer.OPERATOR, P(':')) *
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token(lexer.COMMENT, P('VCARD'))
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-- vCard version (in v3.0 and v4.0 must appear immediately after BEGIN:VCARD).
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local version_sequence = token(lexer.KEYWORD, P('VERSION')) *
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token(lexer.OPERATOR, P(':')) *
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token(lexer.CONSTANT, lexer.digit^1 *
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(P('.') * lexer.digit^1)^-1)
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-- Data.
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local data = token(lexer.IDENTIFIER, lexer.any)
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-- Rules.
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M._rules = {
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{'whitespace', ws},
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{'begin_sequence', begin_sequence},
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{'end_sequence', end_sequence},
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{'version_sequence', version_sequence},
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{'group_sequence', group_sequence},
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{'required_property', required_property},
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{'supported_property', supported_property},
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{'extension', extension},
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{'parameter', parameter},
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{'operator', operator},
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{'data', data},
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}
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-- Folding.
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M._foldsymbols = {
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_patterns = {'BEGIN', 'END'},
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[lexer.KEYWORD] = {['BEGIN'] = 1, ['END'] = -1}
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}
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return M
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