Add user.refreshAvatar()

object/avatar.go

@@ -80,3 +80,21 @@ func DownloadAndUpload(url string, fullFilePath string, lang string) {
 		panic(err)
 	}
 }
+
+func getPermanentAvatarUrlFromBuffer(organization string, username string, fileBuffer *bytes.Buffer, ext string, upload bool) string {
+	if defaultStorageProvider == nil {
+		return ""
+	}
+
+	fullFilePath := fmt.Sprintf("/avatar/%s/%s%s", organization, username, ext)
+	uploadedFileUrl, _ := GetUploadFileUrl(defaultStorageProvider, fullFilePath, false)
+
+	if upload {
+		_, _, err := UploadFileSafe(defaultStorageProvider, fullFilePath, fileBuffer, "en")
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	return uploadedFileUrl
+}

object/avatar_test.go

@@ -16,6 +16,7 @@ package object
 
 import (
 	"fmt"
+	"strings"
 	"testing"
 
 	"github.com/casdoor/casdoor/proxy"
@@ -37,3 +38,22 @@ func TestSyncPermanentAvatars(t *testing.T) {
 		fmt.Printf("[%d/%d]: Update user: [%s]'s permanent avatar: %s\n", i, len(users), user.GetId(), user.PermanentAvatar)
 	}
 }
+
+func TestUpdateAvatars(t *testing.T) {
+	InitConfig()
+	InitDefaultStorageProvider()
+	proxy.InitHttpClient()
+
+	users := GetUsers("casdoor")
+	for _, user := range users {
+		if strings.HasPrefix(user.Avatar, "http") {
+			continue
+		}
+
+		updated := user.refreshAvatar()
+		if updated {
+			user.PermanentAvatar = "*"
+			UpdateUser(user.GetId(), user, []string{"avatar"}, true)
+		}
+	}
+}

object/avatar_util.go

@@ -0,0 +1,167 @@
+// Copyright 2023 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package object
+
+import (
+	"bytes"
+	"crypto/md5"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/fogleman/gg"
+)
+
+func hasGravatar(client *http.Client, email string) (bool, error) {
+	// Clean and lowercase the email
+	email = strings.TrimSpace(strings.ToLower(email))
+
+	// Generate MD5 hash of the email
+	hash := md5.New()
+	io.WriteString(hash, email)
+	hashedEmail := fmt.Sprintf("%x", hash.Sum(nil))
+
+	// Create Gravatar URL with d=404 parameter
+	gravatarURL := fmt.Sprintf("https://www.gravatar.com/avatar/%s?d=404", hashedEmail)
+
+	// Send a request to Gravatar
+	req, err := http.NewRequest("GET", gravatarURL, nil)
+	if err != nil {
+		return false, err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return false, err
+	}
+	defer resp.Body.Close()
+
+	// Check if the user has a custom Gravatar image
+	if resp.StatusCode == http.StatusOK {
+		return true, nil
+	} else if resp.StatusCode == http.StatusNotFound {
+		return false, nil
+	} else {
+		return false, fmt.Errorf("failed to fetch gravatar image: %s", resp.Status)
+	}
+}
+
+func getGravatarFileBuffer(client *http.Client, email string) (*bytes.Buffer, string, error) {
+	// Clean and lowercase the email
+	email = strings.TrimSpace(strings.ToLower(email))
+
+	// Generate MD5 hash of the email
+	hash := md5.New()
+	io.WriteString(hash, email)
+	hashedEmail := fmt.Sprintf("%x", hash.Sum(nil))
+
+	// Create Gravatar URL
+	gravatarURL := fmt.Sprintf("https://www.gravatar.com/avatar/%s", hashedEmail)
+
+	// Download the image
+	req, err := http.NewRequest("GET", gravatarURL, nil)
+	if err != nil {
+		return nil, "", err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, "", fmt.Errorf("failed to download gravatar image: %s", resp.Status)
+	}
+
+	// Get the content type and determine the file extension
+	contentType := resp.Header.Get("Content-Type")
+	fileExtension := ""
+	switch contentType {
+	case "image/jpeg":
+		fileExtension = ".jpg"
+	case "image/png":
+		fileExtension = ".png"
+	case "image/gif":
+		fileExtension = ".gif"
+	default:
+		return nil, "", fmt.Errorf("unsupported content type: %s", contentType)
+	}
+
+	// Save the image to a bytes.Buffer
+	buffer := &bytes.Buffer{}
+	_, err = io.Copy(buffer, resp.Body)
+	if err != nil {
+		return nil, "", err
+	}
+
+	return buffer, fileExtension, nil
+}
+
+func getColor(data []byte) color.RGBA {
+	r := int(data[0]) % 256
+	g := int(data[1]) % 256
+	b := int(data[2]) % 256
+	return color.RGBA{uint8(r), uint8(g), uint8(b), 255}
+}
+
+func getIdenticonFileBuffer(username string) (*bytes.Buffer, string, error) {
+	username = strings.TrimSpace(strings.ToLower(username))
+
+	hash := md5.New()
+	io.WriteString(hash, username)
+	hashedUsername := hash.Sum(nil)
+
+	// Define the size of the image
+	const imageSize = 420
+	const cellSize = imageSize / 7
+
+	// Create a new image
+	img := image.NewRGBA(image.Rect(0, 0, imageSize, imageSize))
+
+	// Create a context
+	dc := gg.NewContextForRGBA(img)
+
+	// Set a background color
+	dc.SetColor(color.RGBA{240, 240, 240, 255})
+	dc.Clear()
+
+	// Get avatar color
+	avatarColor := getColor(hashedUsername)
+
+	// Draw cells
+	for i := 0; i < 7; i++ {
+		for j := 0; j < 7; j++ {
+			if (hashedUsername[i] >> uint(j) & 1) == 1 {
+				dc.SetColor(avatarColor)
+				dc.DrawRectangle(float64(j*cellSize), float64(i*cellSize), float64(cellSize), float64(cellSize))
+				dc.Fill()
+			}
+		}
+	}
+
+	// Save image to a bytes.Buffer
+	buffer := &bytes.Buffer{}
+	err := png.Encode(buffer, img)
+	if err != nil {
+		return nil, "", fmt.Errorf("failed to save image: %w", err)
+	}
+
+	return buffer, ".png", nil
+}

object/product_test.go

@@ -30,7 +30,10 @@ func TestProduct(t *testing.T) {
 	product := GetProduct("admin/product_123")
 	provider := getProvider(product.Owner, "provider_pay_alipay")
 	cert := getCert(product.Owner, "cert-pay-alipay")
-	pProvider := pp.GetPaymentProvider(provider.Type, provider.ClientId, provider.ClientSecret, provider.Host, cert.Certificate, cert.PrivateKey, cert.AuthorityPublicKey, cert.AuthorityRootPublicKey, provider.ClientId2)
+	pProvider, err := pp.GetPaymentProvider(provider.Type, provider.ClientId, provider.ClientSecret, provider.Host, cert.Certificate, cert.PrivateKey, cert.AuthorityPublicKey, cert.AuthorityRootPublicKey, provider.ClientId2)
+	if err != nil {
+		panic(err)
+	}
 
 	paymentName := util.GenerateTimeId()
 	returnUrl := ""

object/user.go

@@ -15,10 +15,12 @@
 package object
 
 import (
+	"bytes"
 	"fmt"
 	"strings"
 
 	"github.com/casdoor/casdoor/conf"
+	"github.com/casdoor/casdoor/proxy"
 	"github.com/casdoor/casdoor/util"
 	"github.com/go-webauthn/webauthn/webauthn"
 	"github.com/xorm-io/core"
@@ -693,3 +695,40 @@ func userChangeTrigger(oldName string, newName string) error {
 
 	return session.Commit()
 }
+
+func (user *User) refreshAvatar() bool {
+	var err error
+	var fileBuffer *bytes.Buffer
+	var ext string
+
+	// Gravatar + Identicon
+	if strings.Contains(user.Avatar, "Gravatar") && user.Email != "" {
+		client := proxy.ProxyHttpClient
+		has, err := hasGravatar(client, user.Email)
+		if err != nil {
+			panic(err)
+		}
+
+		if has {
+			fileBuffer, ext, err = getGravatarFileBuffer(client, user.Email)
+			if err != nil {
+				panic(err)
+			}
+		}
+	}
+
+	if fileBuffer == nil && strings.Contains(user.Avatar, "Identicon") {
+		fileBuffer, ext, err = getIdenticonFileBuffer(user.Name)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	if fileBuffer != nil {
+		avatarUrl := getPermanentAvatarUrlFromBuffer(user.Owner, user.Name, fileBuffer, ext, true)
+		user.Avatar = avatarUrl
+		return true
+	}
+
+	return false
+}