images.go (view raw)
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package main
import (
"encoding/base64"
"errors"
"fmt"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
"github.com/wailsapp/wails/v2/pkg/runtime"
"gorm.io/gorm"
)
type DisplayImage struct {
gorm.Model
MIMEType string
Content []byte
}
type ImageResponse struct {
DataURI string
Base64 string
}
func (app *App) PickContactImage(contact Contact) (*ImageResponse, error) {
filePath, err := runtime.OpenFileDialog(app.ctx, runtime.OpenDialogOptions{
Title: "Select Contact Photo",
Filters: []runtime.FileFilter{
{
DisplayName: "Images (*.png;*.jpg;*.jpeg;*.gif)",
Pattern: "*.png;*.jpg;*.jpeg;*.gif",
},
},
})
if err != nil {
return nil, fmt.Errorf("file dialog failed: %w", err)
}
if filePath == "" {
return nil, nil
}
data, err := os.ReadFile(filePath)
if err != nil {
return nil, fmt.Errorf("failed to read file: %w", err)
}
ext := strings.ToLower(filepath.Ext(filePath))
mimeType := mime.TypeByExtension(ext)
if mimeType == "" {
mimeType = "image/png"
}
base64Str := base64.StdEncoding.EncodeToString(data)
dataURI := fmt.Sprintf("data:%s;base64,%s", mimeType, base64Str)
return &ImageResponse{DataURI: dataURI, Base64: base64Str}, nil
}
func (app *App) GetContactImage(contact Contact) (*ImageResponse, error) {
if contact.ID == 0 {
return nil, nil
}
var img DisplayImage
if err := app.DB.Where("id = ?", contact.DisplayImageID).First(&img).Error; err != nil {
if errors.Is(err, gorm.ErrRecordNotFound) {
return nil, nil
}
return nil, err
}
if len(img.Content) == 0 {
return nil, nil
}
encoded := base64.StdEncoding.EncodeToString(img.Content)
dataURI := fmt.Sprintf("data:%s;base64,%s", img.MIMEType, encoded)
return &ImageResponse{
DataURI: dataURI,
Base64: encoded,
}, nil
}
func (app *App) SaveContactImage(contactID uint, base64Str string) error {
if base64Str == "" {
return nil
}
data, err := base64.StdEncoding.DecodeString(base64Str)
if err != nil {
return fmt.Errorf("invalid base64 image data: %w", err)
}
mimeType := http.DetectContentType(data)
var contact Contact
if err := app.DB.First(&contact, contactID).Error; err != nil {
return fmt.Errorf("contact %d not found: %w", contactID, err)
}
img := DisplayImage{
MIMEType: mimeType,
Content: data,
}
if contact.DisplayImageID != 0 {
img.Model = gorm.Model{ID: contact.DisplayImageID}
}
if err := app.DB.Session(&gorm.Session{FullSaveAssociations: true}).
Save(&img).Error; err != nil {
return fmt.Errorf("failed to save image: %w", err)
}
contact.DisplayImageID = img.ID
if err := app.DB.Save(&contact).Error; err != nil {
return fmt.Errorf("failed to link image to contact: %w", err)
}
return nil
}
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