Improve the performance of the importer

Signed-off-by: Max Magorsch <arzano@gentoo.org>

2 files changed, 131 insertions, 40 deletions

diff --git a/pkg/importer/importer.go b/pkg/importer/importer.go
index cdb278d..76ba8e7 100644
--- a/pkg/importer/importer.go
+++ b/pkg/importer/importer.go
@@ -2,14 +2,88 @@ package importer
 
 import (
 	"archives/pkg/config"
+	"archives/pkg/database"
+	"archives/pkg/models"
 	"fmt"
+	"os"
 	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
 )
 
+var overAllcounter int
+var importedCounter int
+var startTime time.Time
+
+
 func FullImport() {
+
+	fmt.Println("Init import...")
+	filepath.Walk(config.MailDirPath(), initImport)
+
+	overAllcounter = 0
+	importedCounter = 0
+	startTime = time.Now()
+	filepath.Walk(config.MailDirPath(), func(path string, info os.FileInfo, err error) error {
+		if overAllcounter % 1000 == 0 {
+			fmt.Println(strconv.Itoa(overAllcounter) + ": " + time.Now().Sub(startTime).String())
+		}
+		overAllcounter++
+		if err != nil {
+			return err
+		}
+		if !info.IsDir() && getDepth(path, config.MailDirPath()) >= 1 && isPublicList(path) {
+			importedCounter++
+			importMail(path, info.Name())
+		}
+		return nil
+	})
+
+	fmt.Println("Finished full import. Imported " + strconv.Itoa(importedCounter) + " messages.")
+}
+
+func IncrementalImport() {
+	var messages []*models.Message
+	err := database.DBCon.Model(&messages).
+		Column("filename").
+		Select()
+
+	if err != nil {
+		fmt.Println("Problem during import, aborting:")
+		fmt.Println(err)
+		return
+	}
+
 	fmt.Println("Init import...")
 	filepath.Walk(config.MailDirPath(), initImport)
-	fmt.Println("Start import...")
-	filepath.Walk(config.MailDirPath(), importMail)
-	fmt.Println("Finished import.")
+
+	overAllcounter = 0
+	importedCounter = 0
+	startTime = time.Now()
+	filepath.Walk(config.MailDirPath(), func(path string, info os.FileInfo, err error) error {
+		if overAllcounter % 1000 == 0 {
+			fmt.Println(strconv.Itoa(overAllcounter) + ": " + time.Now().Sub(startTime).String())
+		}
+		overAllcounter++
+		if err != nil {
+			return err
+		}
+		if !info.IsDir() && getDepth(path, config.MailDirPath()) >= 1 && isPublicList(path) && !fileIsAlreadyPresent(path, messages) {
+			importedCounter++
+			importMail(path, info.Name())
+		}
+		return nil
+	})
+
+	fmt.Println("Finished incremental import. Imported " + strconv.Itoa(importedCounter) + " new messages.")
 }
+
+func fileIsAlreadyPresent(path string, messages []*models.Message) bool {
+	for _, message := range messages {
+		if strings.Contains(strings.TrimRight(path, ",S"), strings.TrimRight(message.Filename, ",S")){
+			return true
+		}
+	}
+	return false
+}
\ No newline at end of file
diff --git a/pkg/importer/utils.go b/pkg/importer/utils.go
index 8383ad0..de5b27c 100644
--- a/pkg/importer/utils.go
+++ b/pkg/importer/utils.go
@@ -4,9 +4,11 @@ import (
 	"archives/pkg/config"
 	"archives/pkg/database"
 	"archives/pkg/models"
+	"bytes"
 	"fmt"
 	"io"
 	"io/ioutil"
+	"log"
 	"mime/multipart"
 	"net/mail"
 	"os"
@@ -31,8 +33,16 @@ func initImport(path string, info os.FileInfo, err error) error {
 	}
 	if !info.IsDir() && getDepth(path, config.MailDirPath()) >= 1 && isPublicList(path) {
 
-		file, _ := os.Open(path)
-		m, _ := mail.ReadMessage(file)
+		file, err := os.Open(path)
+		defer file.Close()
+		if err != nil {
+			return err
+		}
+
+		m, err := mail.ReadMessage(file)
+		if err != nil {
+			return err
+		}
 
 		mails = append(mails, &models.Message{
 			Id:           m.Header.Get("X-Archives-Hash"),
@@ -47,49 +57,56 @@ func initImport(path string, info os.FileInfo, err error) error {
 }
 
 // TODO
-func importMail(path string, info os.FileInfo, err error) error {
+func importMail(path, filename string) error {
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	r := bytes.NewReader(content)
+	m, err := mail.ReadMessage(r)
 	if err != nil {
 		return err
 	}
-	if !info.IsDir() && getDepth(path, config.MailDirPath()) >= 1 && isPublicList(path) {
-		file, _ := os.Open(path)
-		m, _ := mail.ReadMessage(file)
-
-		msg := models.Message{
-			Id:          m.Header.Get("X-Archives-Hash"),
-			MessageId:   m.Header.Get("Message-Id"),
-			Filename:    info.Name(),
-			From:        m.Header.Get("From"),
-			To:          strings.Split(m.Header.Get("To"), ","),
-			Cc:          strings.Split(m.Header.Get("Cc"), ","),
-			Subject:     m.Header.Get("Subject"),
-
-			List:        getListName(path),
-
-			// TODO
-			Date:        getDate(m.Header),
-			InReplyToId:   getInReplyToMail(m.Header.Get("In-Reply-To"), m.Header.Get("From")),
-			//References:  getReferencesToMail(strings.Split(m.Header.Get("References"), ","), m.Header.Get("From")),
-			Body:        getBody(m.Header, m.Body),
-			Attachments: getAttachments(m.Header, m.Body),
-
-			StartsThread: m.Header.Get("In-Reply-To") == "" && m.Header.Get("References") == "",
-
-			Comment:     "",
-			Hidden:      false,
-		}
 
-		err := insertMessage(msg)
+	go importIntoDatabase(path, filename, m)
 
-		if err != nil {
-			fmt.Println("Error during importing Mail")
-			fmt.Println(err)
-		}
+	return nil
+}
 
-		insertReferencesToMail(strings.Split(m.Header.Get("References"), ","), m.Header.Get("X-Archives-Hash"), m.Header.Get("From"))
+func importIntoDatabase(path, filename string, m *mail.Message) {
+	msg := models.Message{
+		Id:          m.Header.Get("X-Archives-Hash"),
+		MessageId:   m.Header.Get("Message-Id"),
+		Filename:    filename,
+		From:        m.Header.Get("From"),
+		To:          strings.Split(m.Header.Get("To"), ","),
+		Cc:          strings.Split(m.Header.Get("Cc"), ","),
+		Subject:     m.Header.Get("Subject"),
+
+		List:        getListName(path),
+
+		// TODO
+		Date:        getDate(m.Header),
+		InReplyToId:   getInReplyToMail(m.Header.Get("In-Reply-To"), m.Header.Get("From")),
+		//References:  getReferencesToMail(strings.Split(m.Header.Get("References"), ","), m.Header.Get("From")),
+		Body:        getBody(m.Header, m.Body),
+		Attachments: getAttachments(m.Header, m.Body),
+
+		StartsThread: m.Header.Get("In-Reply-To") == "" && m.Header.Get("References") == "",
+
+		Comment:     "",
+		Hidden:      false,
+	}
 
+	err := insertMessage(msg)
+	if err != nil {
+		fmt.Println("Error during importing Mail")
+		fmt.Println(err)
 	}
-	return nil
+
+	insertReferencesToMail(strings.Split(m.Header.Get("References"), ","), m.Header.Get("X-Archives-Hash"), m.Header.Get("From"))
+
 }
 
 func getInReplyToMail(messageId, from string) string {