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gofirebase.go
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gofirebase.go
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package gofirebase
import (
"context"
"log"
"cloud.google.com/go/firestore"
firebase "firebase.google.com/go"
"firebase.google.com/go/db"
"firebase.google.com/go/messaging"
"google.golang.org/api/option"
)
type service struct {
App *firebase.App
DBClient *db.Client
MessageClient *messaging.Client
FirestoreClient *firestore.Client
}
type Config struct {
FirebaseJsonPath string
ProjectID string
DatabaseURL string
IsInitMsg bool
IsInitDatabase bool
}
type FirebaseIntf interface {
Setup(config Config)
SendMessage(token string, msg string) error
}
func NewFirebaseService(config Config) FirebaseIntf {
svc := service{}
svc.Setup(config)
return &svc
}
func (s *service) Setup(sconfig Config) {
opt := option.WithCredentialsFile(sconfig.FirebaseJsonPath)
config := &firebase.Config{ProjectID: sconfig.ProjectID, DatabaseURL: sconfig.DatabaseURL}
app, err := firebase.NewApp(context.Background(), config, opt)
if err != nil {
log.Fatalf(" (1) Failed to initialize Firebase app: %v", err)
}
s.App = app
ctx := context.Background()
if sconfig.IsInitDatabase {
db, err := app.Database(ctx)
if err != nil {
log.Fatalf("(2) Failed to access database: %v", err)
}
s.DBClient = db
}
if sconfig.IsInitMsg {
messenger, err := app.Messaging(context.Background())
if err != nil {
log.Fatalf("(3) Failed to access messaging: %v", err)
}
s.MessageClient = messenger
}
}
func (s *service) SendMessage(token string, msg string) error {
log.Println("SendMessage() invoked ...")
message := &messaging.Message{
Notification: &messaging.Notification{
Title: "Device Notification",
Body: msg,
},
Token: token, // Replace with the device token of the target Android device
}
data, err := s.MessageClient.Send(context.Background(), message)
if err != nil {
log.Printf("(4) Failed to send message: %v", err)
return err
}
log.Println("Successfully Sent Message: ", data)
return err
}