added log system, and added mongodb geolocation

.gitignore

@@ -1,2 +1,3 @@
 *.csv
 *.csv.gz
+*.log

errors.go

@@ -1,9 +1,9 @@
 package main
 
-import "fmt"
+import "log"
 
 func check(err error) {
 	if err != nil {
-		fmt.Println(err)
+		log.Println(err)
 	}
 }

log.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"io"
+	"log"
+	"os"
+	"time"
+)
+
+func savelog() {
+	timeS := time.Now().String()
+	logFile, err := os.OpenFile("log-"+timeS+".log", os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
+	if err != nil {
+		panic(err)
+	}
+	mw := io.MultiWriter(os.Stdout, logFile)
+	log.SetOutput(mw)
+}

main.go

@@ -1,12 +1,10 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"net/http"
 	"os"
 
-	"github.com/fatih/color"
 	"github.com/gorilla/handlers"
 	mgo "gopkg.in/mgo.v2"
 )
@@ -14,6 +12,8 @@ import (
 var cellCollection *mgo.Collection
 
 func main() {
+	savelog()
+
 	//connect with mongodb
 	readMongodbConfig("./mongodbConfig.json")
 	session, err := getSession()
@@ -22,17 +22,18 @@ func main() {
 
 	if len(os.Args) > 1 {
 		if os.Args[1] == "-dataset" {
-			color.Blue("starting to read dataset")
+			log.Println("starting to read dataset")
 			readDataset("cell_towers.csv")
-			color.Blue("finished reading dataset")
+			//readDataset("dataModel_head.csv")
+			log.Println("finished reading dataset")
 		}
 	}
 
 	//http server start
 	readServerConfig("./serverConfig.json")
-	color.Green("server running")
-	fmt.Print("port: ")
-	color.Green(serverConfig.ServerPort)
+	log.Println("server running")
+	log.Print("port: ")
+	log.Println(serverConfig.ServerPort)
 	router := NewRouter()
 
 	headersOk := handlers.AllowedHeaders([]string{"X-Requested-With", "Access-Control-Allow-Origin"})

mongoModels.go

@@ -1,18 +1,23 @@
 package main
 
+type LocationModel struct {
+	Type        string    `json:"type"`
+	Coordinates []float64 `json:"coordinates"`
+}
 type CellModel struct {
-	Radio         string  `json:"radio"`
-	MCC           string  `json:"mcc"`
-	Net           int     `json:"net"`
-	Area          int     `json:"area"`
-	Cell          int     `json:"cell"`
-	Unit          int     `json:"unit"`
-	Lat           float64 `json:"lat"`
-	Lon           float64 `json:"lon"`
-	Range         float64 `json:"range"`
-	Samples       int     `json:"samples"`
-	Changeable    string  `json:"changeable"`
-	Created       int64   `json:"created"`
-	Updated       int64   `json:"updated"`
-	AverageSignal float64 `json:"averagesignal"`
+	Radio         string        `json:"radio"`
+	MCC           string        `json:"mcc"`
+	Net           int           `json:"net"`
+	Area          int           `json:"area"`
+	Cell          int           `json:"cell"`
+	Unit          int           `json:"unit"`
+	Lat           float64       `json:"lat"`
+	Lon           float64       `json:"lon"`
+	Location      LocationModel `json:"location"`
+	Range         float64       `json:"range"`
+	Samples       int           `json:"samples"`
+	Changeable    string        `json:"changeable"`
+	Created       int64         `json:"created"`
+	Updated       int64         `json:"updated"`
+	AverageSignal float64       `json:"averagesignal"`
 }

readDataset.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"bufio"
-	"fmt"
+	"log"
 	"os"
 	"strconv"
 	"strings"
@@ -29,6 +29,13 @@ func readDataset(path string) {
 			cell.Unit, _ = strconv.Atoi(line[5])
 			cell.Lon, _ = strconv.ParseFloat(line[6], 64)
 			cell.Lat, _ = strconv.ParseFloat(line[7], 64)
+			var location LocationModel
+			location.Type = "Point"
+			lon, _ := strconv.ParseFloat(line[6], 64)
+			lat, _ := strconv.ParseFloat(line[7], 64)
+			location.Coordinates = append(location.Coordinates, lat)
+			location.Coordinates = append(location.Coordinates, lon)
+			cell.Location = location
 			cell.Range, _ = strconv.ParseFloat(line[8], 64)
 			cell.Samples, _ = strconv.Atoi(line[9])
 			cell.Changeable = line[10]
@@ -42,8 +49,7 @@ func readDataset(path string) {
 		}
 		lineNum++
 	}
-	fmt.Print("line num: ")
-	fmt.Println(lineNum)
-	fmt.Print("time elapsed from start: ")
-	fmt.Println(time.Since(tStart))
+	log.Println("line num: " + strconv.Itoa(lineNum))
+	log.Print("time elapsed from start: ")
+	log.Println(time.Since(tStart))
 }