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repository.go
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repository.go
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package store
import (
"fmt"
"log"
"gopkg.in/mgo.v2"
"strings"
"gopkg.in/mgo.v2/bson"
)
//Repository ...
type Repository struct{}
// SERVER the DB server
const SERVER = "mongodb://gautam:gautam@ds157233.mlab.com:57233/dummystore"
// DBNAME the name of the DB instance
const DBNAME = "dummyStore"
// COLLECTION is the name of the collection in DB
const COLLECTION = "store"
var productId = 10;
// GetProducts returns the list of Products
func (r Repository) GetProducts() Products {
session, err := mgo.Dial(SERVER)
if err != nil {
fmt.Println("Failed to establish connection to Mongo server:", err)
}
defer session.Close()
c := session.DB(DBNAME).C(COLLECTION)
results := Products{}
if err := c.Find(nil).All(&results); err != nil {
fmt.Println("Failed to write results:", err)
}
return results
}
// GetProductById returns a unique Product
func (r Repository) GetProductById(id int) Product {
session, err := mgo.Dial(SERVER)
if err != nil {
fmt.Println("Failed to establish connection to Mongo server:", err)
}
defer session.Close()
c := session.DB(DBNAME).C(COLLECTION)
var result Product
fmt.Println("ID in GetProductById", id);
if err := c.FindId(id).One(&result); err != nil {
fmt.Println("Failed to write result:", err)
}
return result
}
// GetProductsByString takes a search string as input and returns products
func (r Repository) GetProductsByString(query string) Products {
session, err := mgo.Dial(SERVER)
if err != nil {
fmt.Println("Failed to establish connection to Mongo server:", err)
}
defer session.Close()
c := session.DB(DBNAME).C(COLLECTION)
result := Products{}
// Logic to create filter
qs := strings.Split(query, " ")
and := make([]bson.M, len(qs))
for i, q := range qs {
and[i] = bson.M{"title": bson.M{
"$regex": bson.RegEx{Pattern: ".*" + q + ".*", Options: "i"},
}}
}
filter := bson.M{"$and": and}
if err := c.Find(&filter).Limit(5).All(&result); err != nil {
fmt.Println("Failed to write result:", err)
}
return result
}
// AddProduct adds a Product in the DB
func (r Repository) AddProduct(product Product) bool {
session, err := mgo.Dial(SERVER)
defer session.Close()
productId += 1
product.ID = productId
session.DB(DBNAME).C(COLLECTION).Insert(product)
if err != nil {
log.Fatal(err)
return false
}
fmt.Println("Added New Product ID- ", product.ID)
return true
}
// UpdateProduct updates a Product in the DB
func (r Repository) UpdateProduct(product Product) bool {
session, err := mgo.Dial(SERVER)
defer session.Close()
err = session.DB(DBNAME).C(COLLECTION).UpdateId(product.ID, product)
if err != nil {
log.Fatal(err)
return false
}
fmt.Println("Updated Product ID - ", product.ID)
return true
}
// DeleteProduct deletes an Product
func (r Repository) DeleteProduct(id int) string {
session, err := mgo.Dial(SERVER)
defer session.Close()
// Remove product
if err = session.DB(DBNAME).C(COLLECTION).RemoveId(id); err != nil {
log.Fatal(err)
return "INTERNAL ERR"
}
fmt.Println("Deleted Product ID - ", id)
// Write status
return "OK"
}