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server.go
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server.go
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package main
import (
"context"
"fmt"
"log"
"net/http"
"os"
"time"
"github.com/gin-gonic/gin"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"github.com/joho/godotenv"
)
type MongoDBClient struct {
Client *mongo.Client
DBName string
}
func NewMongoDBClient(uri, dbName string) (*MongoDBClient, error) {
clientOptions := options.Client().ApplyURI(uri)
client, err := mongo.Connect(context.Background(), clientOptions)
if err != nil {
return nil, err
}
return &MongoDBClient{
Client: client,
DBName: dbName,
}, nil
}
func (m *MongoDBClient) Close() error {
return m.Client.Disconnect(context.Background())
}
func respondWithError(c *gin.Context, httpStatusCode int, err error) {
log.Printf("Error: %v", err)
c.JSON(httpStatusCode, gin.H{"error": err.Error()})
}
func GetAllDocuments(m *MongoDBClient, collectionName string, location, category string) ([]bson.M, error) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
collection := m.Client.Database(m.DBName).Collection(collectionName)
filter := bson.M{}
if location != "" {
filter["location"] = location
}
if category != "" {
filter["category"] = category
}
cursor, err := collection.Find(ctx, filter)
if err != nil {
return nil, err
}
defer cursor.Close(ctx)
var results []bson.M
if err = cursor.All(ctx, &results); err != nil {
return nil, err
}
return results, nil
}
//get inventories
func getInventoriesHandler(mongoDBClient *MongoDBClient) gin.HandlerFunc {
return func(c *gin.Context) {
location := c.Query("location")
category := c.Query("category")
documents, err := GetAllDocuments(mongoDBClient, "inventories", location, category)
if err != nil {
respondWithError(c, http.StatusInternalServerError, err)
return
}
c.JSON(http.StatusOK, documents)
}
}
//get news
func getNewsHandler(mongoDBClient *MongoDBClient) gin.HandlerFunc {
return func(c *gin.Context) {
documents, err := GetAllDocuments(mongoDBClient, "news", "", "")
if err != nil {
respondWithError(c, http.StatusInternalServerError, err)
return
}
c.JSON(http.StatusOK, documents)
}
}
func helloworld() {
fmt.Println("Hello World!")
}
func goodbye() {
fmt.Println("Good Bye!")
}
func main() {
if os.Getenv("ENV") != "production" {
err := godotenv.Load()
if err != nil {
log.Fatal("Error loading .env file")
}
}
dbMongo := os.Getenv("DB_MONGO")
port := os.Getenv("PORT")
if port == "" {
port = "8080" // Default port for local testing
}
mongoDBClient, err := NewMongoDBClient(dbMongo, "SFN")
if err != nil {
log.Fatal(err)
}
cwd, _ := os.Getwd()
log.Println("Current working directory:", cwd)
defer mongoDBClient.Close()
r := gin.Default()
//get inventories
r.GET("/inventories", getInventoriesHandler(mongoDBClient))
//get news
r.GET("/news", getNewsHandler(mongoDBClient))
r.Run(":" + port)
}