Class: ValuesReader
- Inherits:
-
Object
- Object
- ValuesReader
- Includes:
- LogUtils::Logging, TextUtils::ValueHelper
- Defined in:
- lib/textutils/reader/values_reader.rb
Instance Method Summary collapse
-
#each_line ⇒ Object
support multi line records.
-
#initialize(path, more_attribs = {}) ⇒ ValuesReader
constructor
A new instance of ValuesReader.
Methods included from TextUtils::ValueHelper
#find_grade, #find_key_n_title, #is_address?, #is_region?, #is_taglist?, #is_website?, #is_year?, #match_abv, #match_brewery, #match_city, #match_country, #match_hl, #match_kcal, #match_km_squared, #match_metro, #match_metro_flag, #match_metro_pop, #match_number, #match_og, #match_region_for_country, #match_supra, #match_supra_flag, #match_website, #match_year
Constructor Details
#initialize(path, more_attribs = {}) ⇒ ValuesReader
Returns a new instance of ValuesReader.
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# File 'lib/textutils/reader/values_reader.rb', line 60 def initialize( path, more_attribs={} ) @path = path @more_attribs = more_attribs @data = File.read_utf8( @path ) end |
Instance Method Details
#each_line ⇒ Object
support multi line records
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# File 'lib/textutils/reader/values_reader.rb', line 77 def each_line # support multi line records inside_line = false # todo: find a better name? e.g. line_found? attribs = {} more_values = [] @data.each_line do |line| ## allow alternative comment lines ## e.g. -- comment or ## % comment ## why? # might get used by markdown for marking headers, for example ## NB: for now alternative comment lines not allowed as end of line style e.g ## some data, more data -- comment here if line =~ /^\s*#/ || line =~ /^\s*--/ || line =~ /^\s*%/ # skip komments and do NOT copy to result (keep comments secret!) logger.debug 'skipping comment line' next end if line =~ /^\s*$/ # kommentar oder leerzeile überspringen logger.debug 'skipping blank line' next end # pass 1) remove possible trailing eol comment ## e.g -> nyc, New York # Sample EOL Comment Here (with or without commas,,,,) ## becomes -> nyc, New York line = line.sub( /\s+#.+$/, '' ) # pass 2) remove leading and trailing whitespace line = line.strip ### check for multiline record ## must start with key and colon e.g. brands: if line =~ /^[a-z][a-z0-9.]*[a-z0-9]:/ # NB: every additional line is one value e.g. city:wien, etc. # allows you to use any chars logger.debug " multi-line record - add key-value »#{line}«" more_values.unshift( line.dup ) # add value upfront to array (first value); lets us keep (optional) tags as last entry; fix!! see valuereaderEx v2 next else # NB: new record clears/ends multi-line record if inside_line # check if we already processed a line? if yes; yield last line yield( attribs, more_values ) attribs = {} more_values = [] end inside_line = true end ### guard escaped commas (e.g. \,) line = line.gsub( '\,', '♣' ) # use black club suit/=shamrock char for escaped separator ## use generic separator (allow us to configure separator) line = line.gsub( ',', '›') ## restore escaped commas (before split) line = line.gsub( '♣', ',' ) logger.debug "line: »#{line}«" values = line.split( '›' ) # pass 1) remove leading and trailing whitespace for values values = values.map { |value| value.strip } ##### todo remove support of comment column? (NB: must NOT include commas) # pass 2) remove comment columns values = values.select do |value| if value =~ /^#/ ## start with # treat it as a comment column; e.g. remove it logger.debug " removing column with value »#{value}«" false else true end end logger.debug " values: »#{values.join('« »')}«" attribs, more_values = find_key_n_title( values ) attribs = attribs.merge( @more_attribs ) # e.g. merge country_id and other defaults if present end # each lines # do NOT forget to yield last line (if present/processed) if inside_line yield( attribs, more_values ) end end |