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Versions: 4
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Contents
module RegexpPreview
class MultiLine
attr_reader :file, :format, :params
def initialize(file, format, params = {})
@file = file
@format = format
@params = params[:params]
end
def matches_json
{
params: {
setting: { # for vue.js
regexp: nil,
time_format: nil,
}
},
matches: matches.compact,
}
end
private
def matches
return [] if patterns.empty?
reader = FileReverseReader.new(File.open(file))
result = []
target_lines = reader.tail(Settings.in_tail_preview_line_count).map{|line| line << "\n" }
whole_string = target_lines.join
re_firstline = Regexp.new(params[:format_firstline])
indexes = []
cur = 0
while first_index = whole_string.index(re_firstline, cur)
indexes << first_index
cur = first_index + 1
end
indexes.each_with_index do |index, i|
next_index = indexes[i + 1] || -1
chunk = whole_string[index...next_index]
ret = detect_chunk(chunk)
next unless ret
result << ret
end
result
end
def detect_chunk(chunk)
whole = ""
matches = []
offset = 0
patterns.each do |pat|
match = chunk.match(pat)
return nil unless match
offset = chunk.index(pat)
return nil if offset > 0
chunk = chunk[match[0].length..-1]
match.names.each_with_index do |name, index|
matches << {
key: name,
matched: match[name],
pos: match.offset(index + 1).map{|pos| pos + whole.length},
}
end
whole << match[0]
end
{
whole: whole,
matches: matches,
}
end
def patterns
@patterns ||= (1..20).map do |n|
params["format#{n}"].presence
end.compact.map {|pattern| Regexp.new(pattern, Regexp::MULTILINE)}
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems