70 lines
3.3 KiB
Ruby
70 lines
3.3 KiB
Ruby
module Carto
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module DB
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module Sanitize
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PREFIX_REPLACEMENT = 'table_'.freeze
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SUFFIX_REPLACEMENT = '_t'.freeze
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CHARACTER_REPLACEMENT = '_'.freeze
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MAX_IDENTIFIER_LENGTH = 63
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DISALLOWED_STARTING_CHARACTERS_REGEX = /^[^a-z]+/
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DISALLOWED_CHARACTERS_REGEX = /[^a-z|_|0-9]/
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REPEATED_UNDERSCORES_REGEX = /_{2,}/
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SYSTEM_TABLE_NAMES = %w(spatial_ref_sys geography_columns geometry_columns raster_columns raster_overviews
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cdb_tablemetadata geometry raster).freeze
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RESERVED_TABLE_NAMES = %w(layergroup all public).freeze
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RESERVED_WORDS = %w(all analyse analyze and any array as asc asymmetric authorization between binary both
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case cast check collate column constraint create cross current_date current_role
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current_time current_timestamp current_user default deferrable desc distinct do else
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end except false for foreign freeze from full grant group having ilike in initially
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inner intersect into is isnull join leading left like limit localtime localtimestamp
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natural new not notnull null off offset old on only or order outer overlaps placing
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primary references right select session_user similar some symmetric table then to
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trailing true union unique user using verbose when where xmin xmax).freeze
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def self.append_with_truncate_and_sanitize(identifier, suffix)
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suffix_length = suffix.length
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unless suffix_length < MAX_IDENTIFIER_LENGTH
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raise "'#{suffix}' is too long (#{suffix_length} >= #{MAX_IDENTIFIER_LENGTH}) for append"
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end
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truncated_identifier = if identifier.length + suffix_length > MAX_IDENTIFIER_LENGTH
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identifier[0..(MAX_IDENTIFIER_LENGTH - suffix_length - 1)]
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else
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identifier
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end
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sanitize_identifier("#{truncated_identifier}#{suffix}")
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end
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def self.sanitize_identifier(identifier)
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# Make lowercase
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sanitized_identifier = identifier.downcase
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# Strip of starting or ending white spaces
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sanitized_identifier = sanitized_identifier.strip
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# Remove disallowed starting characters
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if sanitized_identifier =~ DISALLOWED_STARTING_CHARACTERS_REGEX
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sanitized_identifier = PREFIX_REPLACEMENT + sanitized_identifier
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end
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# Replace disallowed characters with '_'
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sanitized_identifier = sanitized_identifier.gsub(DISALLOWED_CHARACTERS_REGEX, CHARACTER_REPLACEMENT)
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# Remove repated '_'
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sanitized_identifier = sanitized_identifier.gsub(REPEATED_UNDERSCORES_REGEX, '_')
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# Make sure it's not too long
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sanitized_identifier = sanitized_identifier[0..(MAX_IDENTIFIER_LENGTH - 1)]
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# Append _t if is a reserved word or reserved table name
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if (RESERVED_WORDS + RESERVED_TABLE_NAMES + SYSTEM_TABLE_NAMES).map(&:downcase).include?(sanitized_identifier)
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sanitized_identifier += SUFFIX_REPLACEMENT
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end
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sanitized_identifier
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end
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end
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end
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end
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