/
conc.go
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/
conc.go
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// Copyright 2023 Tomas Machalek <tomas.machalek@gmail.com>
// Copyright 2023 Institute of the Czech National Corpus,
// Faculty of Arts, Charles University
// This file is part of MQUERY.
//
// MQUERY is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// MQUERY is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with MQUERY. If not, see <https://www.gnu.org/licenses/>.
package conc
import (
"html"
"regexp"
"strings"
"unicode/utf8"
"github.com/czcorpus/mquery-sru/mango"
"github.com/rs/zerolog/log"
)
const (
invalidParent = 1000000
)
var (
splitPatt = regexp.MustCompile(`\s+`)
)
type TokenSlice []*Token
type Token struct {
Word string `json:"word"`
Strong bool `json:"strong"`
Attrs map[string]string `json:"attrs"`
}
type ConcordanceLine struct {
Text TokenSlice `json:"text"`
Ref string `json:"ref"`
}
type ConcExamples struct {
Lines []ConcordanceLine `json:"lines"`
}
type LineParser struct {
attrs []string
}
func (lp *LineParser) parseTokenQuadruple(s []string) *Token {
mAttrs := make(map[string]string)
rawAttrs := strings.Split(s[2], "/")[1:]
var token Token
if len(rawAttrs) != len(lp.attrs)-1 {
log.Warn().
Str("value", s[2]).
Int("expectedNumAttrs", len(lp.attrs)-1).
Msg("cannot parse token quadruple")
token.Word = s[0]
for _, attr := range lp.attrs[1:] {
mAttrs[attr] = "N/A"
}
} else {
for i, attr := range lp.attrs[1:] {
mAttrs[attr] = rawAttrs[i]
}
token.Word = s[0]
token.Strong = len(s[1]) > 2
token.Attrs = mAttrs
}
return &token
}
func (lp *LineParser) normalizeTokens(tokens []string) []string {
ans := make([]string, 0, len(tokens))
var parTok strings.Builder
for _, tok := range tokens {
tokLen := utf8.RuneCountInString(tok)
if tok == "" {
continue
} else if tokLen == 1 {
ans = append(ans, tok)
} else if tok[0] == '{' {
if tok[tokLen-1] != '}' {
parTok.WriteString(tok)
} else {
ans = append(ans, tok)
}
} else if tok[tokLen-1] == '}' {
parTok.WriteString(tok)
ans = append(ans, parTok.String())
parTok.Reset()
} else {
ans = append(ans, tok)
}
}
return ans
}
// parseRawLine
func (lp *LineParser) parseRawLine(line string) ConcordanceLine {
rtokens := splitPatt.Split(html.EscapeString(line), -1)
items := lp.normalizeTokens(rtokens[1:])
if len(items)%4 != 0 {
log.Error().
Str("origLine", line).
Msg("unparseable Manatee KWIC line")
return ConcordanceLine{
Text: []*Token{{Word: "---- ERROR (unparseable) ----"}},
Ref: rtokens[0],
}
}
tokens := make(TokenSlice, 0, len(items)/4)
for i := 0; i < len(items); i += 4 {
tokens = append(tokens, lp.parseTokenQuadruple(items[i:i+4]))
}
return ConcordanceLine{Text: tokens, Ref: rtokens[0]}
}
// Parse converts Manatee-encoded concordance lines into MQuery format.
// It also escapes strings to make them usable in XML documents.
func (lp *LineParser) Parse(data mango.GoConcExamples) []ConcordanceLine {
pLines := make([]ConcordanceLine, len(data.Lines))
for i, line := range data.Lines {
pLines[i] = lp.parseRawLine(line)
}
return pLines
}
func NewLineParser(attrs []string) *LineParser {
return &LineParser{
attrs: attrs,
}
}