Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/services/docextractor/archive.go

@@ -0,0 +1,67 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package docextractor
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/mholt/archiver/v3"
+)
+
+type archiveExtractor struct {
+	SubExtractor Extractor
+}
+
+func (ae *archiveExtractor) Match(filename string) bool {
+	_, err := archiver.ByExtension(filename)
+	return err == nil
+}
+
+func (ae *archiveExtractor) Extract(name string, r io.ReadSeeker) (string, error) {
+	dir, err := os.MkdirTemp(os.TempDir(), "archiver")
+	if err != nil {
+		return "", fmt.Errorf("error creating temporary file: %v", err)
+	}
+	defer os.RemoveAll(dir)
+
+	f, err := os.Create(filepath.Join(dir, name))
+	if err != nil {
+		return "", fmt.Errorf("error copying data into temporary file: %v", err)
+	}
+	_, err = io.Copy(f, r)
+	f.Close()
+	if err != nil {
+		return "", fmt.Errorf("error copying data into temporary file: %v", err)
+	}
+
+	var text strings.Builder
+	err = archiver.Walk(f.Name(), func(file archiver.File) error {
+		text.WriteString(file.Name() + " ")
+		if ae.SubExtractor != nil {
+			filename := filepath.Base(file.Name())
+			filename = strings.ReplaceAll(filename, "-", " ")
+			filename = strings.ReplaceAll(filename, ".", " ")
+			filename = strings.ReplaceAll(filename, ",", " ")
+			data, err2 := io.ReadAll(file)
+			if err2 != nil {
+				return err2
+			}
+			subtext, extractErr := ae.SubExtractor.Extract(filename, bytes.NewReader(data))
+			if extractErr == nil {
+				text.WriteString(subtext + " ")
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		return "", err
+	}
+
+	return text.String(), nil
+}