51 lines
1.4 KiB
Crystal
51 lines
1.4 KiB
Crystal
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require "../prompt"
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class StringParser
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def parse(current : String) : Prompt
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prompt = Prompt.new
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remaining = read_string(prompt.zones, current)
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prompt.prelude_zone.content << remaining
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prompt.system_zone.content.reverse!
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prompt.past_zone.content.reverse!
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prompt.present_zone.content.reverse!
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prompt.future_zone.content.reverse!
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return prompt
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end
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def read_string(zone_list : Array(Zone), current : String)
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# puts "== read_string(current=#{current})"
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pos = current.index("@@")
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## If there is no remaining @@, then return current
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if pos.nil?
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# puts "-- no remaining @@, returning"
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return current
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end
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## If @@ is not at position 0, then parse its content first and return remains
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if pos > 0
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return current[0..(pos-1)] + read_string(zone_list, current[pos..])
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end
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## If @@ is at position 0, try detecting tag
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zone = zone_list.find { |zone| current.starts_with?("@@" + zone.tag) }
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## When there is not recognizable tag, skip fake tag and parse
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if zone.nil?
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# puts "-- no recognizable tag, returning as is"
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return "@@" + read_string(zone_list, current[2..])
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end
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## Handle recognized tag, skip tag & parse & add remains
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# puts "-- found tag #{zone.tag}"
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remaining = read_string(zone_list, current[(2+zone.tag.size)..])
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zone.content << remaining
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return ""
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end
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end
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