1package main
  2
  3import (
  4	"encoding/json"
  5	"fmt"
  6	"io/ioutil"
  7	"log"
  8
  9	mgo "gopkg.in/mgo.v2"
 10	"gopkg.in/mgo.v2/bson"
 11)
 12
 13//MongoConfig stores the configuration of mongodb to connect
 14type MongoConfig struct {
 15	Ip       string `json:"ip"`
 16	Database string `json:"database"`
 17}
 18
 19var mongoConfig MongoConfig
 20
 21func readMongodbConfig(path string) {
 22	file, e := ioutil.ReadFile(path)
 23	if e != nil {
 24		fmt.Println("error:", e)
 25	}
 26	content := string(file)
 27	json.Unmarshal([]byte(content), &mongoConfig)
 28}
 29
 30func getSession() (*mgo.Session, error) {
 31	session, err := mgo.Dial("mongodb://" + mongoConfig.Ip)
 32	if err != nil {
 33		panic(err)
 34	}
 35	//defer session.Close()
 36
 37	// Optional. Switch the session to a monotonic behavior.
 38	session.SetMode(mgo.Monotonic, true)
 39
 40	// Optional. Switch the session to a monotonic behavior.
 41	session.SetMode(mgo.Monotonic, true)
 42
 43	return session, err
 44}
 45func getCollection(session *mgo.Session, collection string) *mgo.Collection {
 46
 47	c := session.DB(mongoConfig.Database).C(collection)
 48	return c
 49}
 50
 51func saveDataEntryToMongo(c *mgo.Collection, user UserModel) {
 52	/*
 53		how to call this function
 54			var auxArr []string
 55			user := UserModel{"123", auxArr}
 56			saveDataEntryToMongo(c, user)
 57	*/
 58
 59	err := c.Insert(user)
 60	if err != nil {
 61		log.Fatal(err)
 62	}
 63
 64}
 65
 66func saveItem(c *mgo.Collection, item ItemModel) {
 67	//first, check if the item already exists
 68	result := ItemModel{}
 69	err := c.Find(bson.M{"id": item.ID}).One(&result)
 70	if err != nil {
 71		//item not found, so let's add a new entry
 72		err = c.Insert(item)
 73		check(err)
 74	} else {
 75		/*result.Data = append(result.Data, dataEntry)
 76		err = c.Update(bson.M{"id": dataEntry.ContratoCOD}, result)
 77		if err != nil {
 78			log.Fatal(err)
 79		}*/
 80	}
 81
 82}
 83
 84func saveUser(c *mgo.Collection, user UserModel) {
 85	//first, check if the item already exists
 86	result := UserModel{}
 87	err := c.Find(bson.M{"id": user.ID}).One(&result)
 88	if err != nil {
 89		//item not found, so let's add a new entry
 90		err = c.Insert(user)
 91		check(err)
 92	} else {
 93		/*result.Data = append(result.Data, dataEntry)
 94		err = c.Update(bson.M{"id": dataEntry.ContratoCOD}, result)
 95		if err != nil {
 96			log.Fatal(err)
 97		}*/
 98	}
 99
100}
101
102func getUserById(id string) (UserModel, error) {
103	result := UserModel{}
104	err := userCollection.Find(bson.M{"id": id}).One(&result)
105	if err != nil {
106		//user not exist
107		return result, err
108	} else {
109		//user exist
110		return result, err
111	}
112}
113func getAllItems() ([]ItemModel, error) {
114	result := []ItemModel{}
115	iter := itemCollection.Find(nil).Limit(100).Iter()
116	err := iter.All(&result)
117	if err != nil {
118		//user not exist
119		return result, err
120	} else {
121		//user exist
122		return result, err
123	}
124}