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mirror of https://github.com/go-gitea/gitea synced 2024-12-23 09:04:26 +00:00
gitea/modules/indexer/code/search.go
6543 7fdc048153
Patch in exact search for meilisearch (#29671)
meilisearch does not have an search option to contorl fuzzynes per query
right now:
 - https://github.com/meilisearch/meilisearch/issues/1192
 - https://github.com/orgs/meilisearch/discussions/377
 - https://github.com/meilisearch/meilisearch/discussions/1096

so we have to create a workaround by post-filter the search result in
gitea until this is addressed.

For future works I added an option in backend only atm, to enable
fuzzynes for issue indexer too.
And also refactored the code so the fuzzy option is equal in logic to
code indexer


---
*Sponsored by Kithara Software GmbH*
2024-03-09 01:39:27 +00:00

149 lines
3.9 KiB
Go

// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package code
import (
"bytes"
"context"
"html/template"
"strings"
"code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/indexer/code/internal"
"code.gitea.io/gitea/modules/timeutil"
)
// Result a search result to display
type Result struct {
RepoID int64
Filename string
CommitID string
UpdatedUnix timeutil.TimeStamp
Language string
Color string
Lines []ResultLine
}
type ResultLine struct {
Num int
FormattedContent template.HTML
}
type SearchResultLanguages = internal.SearchResultLanguages
func indices(content string, selectionStartIndex, selectionEndIndex int) (int, int) {
startIndex := selectionStartIndex
numLinesBefore := 0
for ; startIndex > 0; startIndex-- {
if content[startIndex-1] == '\n' {
if numLinesBefore == 1 {
break
}
numLinesBefore++
}
}
endIndex := selectionEndIndex
numLinesAfter := 0
for ; endIndex < len(content); endIndex++ {
if content[endIndex] == '\n' {
if numLinesAfter == 1 {
break
}
numLinesAfter++
}
}
return startIndex, endIndex
}
func writeStrings(buf *bytes.Buffer, strs ...string) error {
for _, s := range strs {
_, err := buf.WriteString(s)
if err != nil {
return err
}
}
return nil
}
func searchResult(result *internal.SearchResult, startIndex, endIndex int) (*Result, error) {
startLineNum := 1 + strings.Count(result.Content[:startIndex], "\n")
var formattedLinesBuffer bytes.Buffer
contentLines := strings.SplitAfter(result.Content[startIndex:endIndex], "\n")
lines := make([]ResultLine, 0, len(contentLines))
index := startIndex
for i, line := range contentLines {
var err error
if index < result.EndIndex &&
result.StartIndex < index+len(line) &&
result.StartIndex < result.EndIndex {
openActiveIndex := max(result.StartIndex-index, 0)
closeActiveIndex := min(result.EndIndex-index, len(line))
err = writeStrings(&formattedLinesBuffer,
line[:openActiveIndex],
line[openActiveIndex:closeActiveIndex],
line[closeActiveIndex:],
)
} else {
err = writeStrings(&formattedLinesBuffer,
line,
)
}
if err != nil {
return nil, err
}
lines = append(lines, ResultLine{Num: startLineNum + i})
index += len(line)
}
// we should highlight the whole code block first, otherwise it doesn't work well with multiple line highlighting
hl, _ := highlight.Code(result.Filename, "", formattedLinesBuffer.String())
highlightedLines := strings.Split(string(hl), "\n")
// The lines outputted by highlight.Code might not match the original lines, because "highlight" removes the last `\n`
lines = lines[:min(len(highlightedLines), len(lines))]
highlightedLines = highlightedLines[:len(lines)]
for i := 0; i < len(lines); i++ {
lines[i].FormattedContent = template.HTML(highlightedLines[i])
}
return &Result{
RepoID: result.RepoID,
Filename: result.Filename,
CommitID: result.CommitID,
UpdatedUnix: result.UpdatedUnix,
Language: result.Language,
Color: result.Color,
Lines: lines,
}, nil
}
// PerformSearch perform a search on a repository
// if isFuzzy is true set the Damerau-Levenshtein distance from 0 to 2
func PerformSearch(ctx context.Context, repoIDs []int64, language, keyword string, page, pageSize int, isFuzzy bool) (int, []*Result, []*internal.SearchResultLanguages, error) {
if len(keyword) == 0 {
return 0, nil, nil, nil
}
total, results, resultLanguages, err := (*globalIndexer.Load()).Search(ctx, repoIDs, language, keyword, page, pageSize, isFuzzy)
if err != nil {
return 0, nil, nil, err
}
displayResults := make([]*Result, len(results))
for i, result := range results {
startIndex, endIndex := indices(result.Content, result.StartIndex, result.EndIndex)
displayResults[i], err = searchResult(result, startIndex, endIndex)
if err != nil {
return 0, nil, nil, err
}
}
return int(total), displayResults, resultLanguages, nil
}