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# frozen_string_literal: true
module JSONSchemer
module Format
module URITemplate
# https://datatracker.ietf.org/doc/html/rfc6570
PCT_ENCODED = '%\h{2}' # pct-encoded = "%" HEXDIG HEXDIG
EXPLODE = '\*' # explode = "*"
MAX_LENGTH = '[1-9]\d{0,3}' # max-length = %x31-39 0*3DIGIT ; positive integer < 10000
PREFIX = ":#{MAX_LENGTH}" # prefix = ":" max-length
MODIFIER_LEVEL4 = "#{PREFIX}|#{EXPLODE}" # modifier-level4 = prefix / explode
VARCHAR = "(\\w|#{PCT_ENCODED})" # varchar = ALPHA / DIGIT / "_" / pct-encoded
VARNAME = "#{VARCHAR}(\\.?#{VARCHAR})*" # varname = varchar *( ["."] varchar )
VARSPEC = "#{VARNAME}(#{MODIFIER_LEVEL4})?" # varspec = varname [ modifier-level4 ]
VARIABLE_LIST = "#{VARSPEC}(,#{VARSPEC})*" # variable-list = varspec *( "," varspec )
OPERATOR = '[+#./;?&=,!@|]' # operator = op-level2 / op-level3 / op-reserve
# op-level2 = "+" / "#"
# op-level3 = "." / "/" / ";" / "?" / "&"
# op-reserve = "=" / "," / "!" / "@" / "|"
EXPRESSION = "{#{OPERATOR}?#{VARIABLE_LIST}}" # expression = "{" [ operator ] variable-list "}"
LITERALS = "[^\\x00-\\x20\\x7F\"%'<>\\\\^`{|}]|#{PCT_ENCODED}" # literals = %x21 / %x23-24 / %x26 / %x28-3B / %x3D / %x3F-5B
# / %x5D / %x5F / %x61-7A / %x7E / ucschar / iprivate
# / pct-encoded
# ; any Unicode character except: CTL, SP,
# ; DQUOTE, "'", "%" (aside from pct-encoded),
# ; "<", ">", "\", "^", "`", "{", "|", "}"
URI_TEMPLATE = "(#{LITERALS}|#{EXPRESSION})*" # URI-Template = *( literals / expression )
URI_TEMPLATE_REGEX = /\A#{URI_TEMPLATE}\z/
def valid_uri_template?(data)
URI_TEMPLATE_REGEX.match?(data)
end
end
end
end
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