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// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package search
import (
"bytes"
"html"
gotemplate "html/template"
"strings"
"code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/indexer"
"code.gitea.io/gitea/modules/util"
)
// Result a search result to display
type Result struct {
RepoID int64
Filename string
HighlightClass string
LineNumbers []int
FormattedLines gotemplate.HTML
}
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 *indexer.RepoSearchResult, 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")
lineNumbers := make([]int, 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 := util.Max(result.StartIndex-index, 0)
closeActiveIndex := util.Min(result.EndIndex-index, len(line))
err = writeStrings(&formattedLinesBuffer,
`<li>`,
html.EscapeString(line[:openActiveIndex]),
`<span class='active'>`,
html.EscapeString(line[openActiveIndex:closeActiveIndex]),
`</span>`,
html.EscapeString(line[closeActiveIndex:]),
`</li>`,
)
} else {
err = writeStrings(&formattedLinesBuffer,
`<li>`,
html.EscapeString(line),
`</li>`,
)
}
if err != nil {
return nil, err
}
lineNumbers[i] = startLineNum + i
index += len(line)
}
return &Result{
RepoID: result.RepoID,
Filename: result.Filename,
HighlightClass: highlight.FileNameToHighlightClass(result.Filename),
LineNumbers: lineNumbers,
FormattedLines: gotemplate.HTML(formattedLinesBuffer.String()),
}, nil
}
// PerformSearch perform a search on a repository
func PerformSearch(repoIDs []int64, keyword string, page, pageSize int) (int, []*Result, error) {
if len(keyword) == 0 {
return 0, nil, nil
}
total, results, err := indexer.SearchRepoByKeyword(repoIDs, keyword, page, pageSize)
if err != nil {
return 0, 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, err
}
}
return int(total), displayResults, nil
}
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