Add /all API

model.go

@@ -1,5 +1,10 @@
 package main
 
+import (
+	"github.com/aws/aws-sdk-go/service/dynamodb"
+	"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
+)
+
 // Device struct for store device data from iot-item table
 type Device struct {
 	Device string `json:"device"`
@@ -18,6 +23,7 @@ type ItemFloraData struct {
 	Conductivity float32 `json:"conductivity"`
 	Moisture     float32 `json:"moisture"`
 	Temperature  float32 `json:"temperature"`
+	Humidity     float32 `json:"humidity"`
 }
 
 type Item struct {
@@ -26,3 +32,20 @@ type Item struct {
 	Info      ItemInfo      `json:"info"`
 	Data      ItemFloraData `json:"data"`
 }
+
+func (d Device) History(svc *dynamodb.DynamoDB, limit int64) ([]Item, error) {
+	result, err := GetHistory(svc, d.Device, limit)
+	var ev []Item
+	if err != nil {
+		return ev, err
+	}
+	for _, i := range result.Items {
+		item := Item{}
+		err = dynamodbattribute.UnmarshalMap(i, &item)
+		if err != nil {
+			return ev, err
+		}
+		ev = append(ev, item)
+	}
+	return ev, nil
+}

read_item.go

@@ -1,15 +1,25 @@
 package main
 
 import (
+	"encoding/json"
+	"fmt"
 	"io"
 	"log"
 	"net/http"
+	"os"
 
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/dynamodb"
+	"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
 	"github.com/flosch/pongo2"
 	"github.com/gorilla/mux"
 )
 
 var tplHome = pongo2.Must(pongo2.FromFile("home.html"))
+var sess *session.Session
+var err error
+var svc *dynamodb.DynamoDB
 
 func indexHandler(w http.ResponseWriter, r *http.Request) {
 	// Execute the template per HTTP request
@@ -29,46 +39,50 @@ func healthCheckHandler(w http.ResponseWriter, r *http.Request) {
 	io.WriteString(w, `{"alive": true}`)
 }
 
+func overallHandler(w http.ResponseWriter, r *http.Request) {
+
+	devices, _ := GetDevices(svc)
+	var result []Item
+	for _, i := range devices.Items {
+		device := Device{}
+		err := dynamodbattribute.UnmarshalMap(i, &device)
+		if err != nil {
+			fmt.Println("Device error unmarshalling:")
+			fmt.Println(err.Error())
+			os.Exit(1)
+		}
+		data, _ := device.History(svc, 1)
+		result = append(result, data[0])
+	}
+	b, _ := json.Marshal(result)
+
+	w.WriteHeader(http.StatusOK)
+	w.Header().Set("Content-Type", "application/json")
+	io.WriteString(w, string(b))
+}
+
+func oneDeviceHandler(w http.ResponseWriter, r *http.Request) {
+
+	w.WriteHeader(http.StatusOK)
+	w.Header().Set("Content-Type", "application/json")
+
+}
+
 func main() {
+
 	// Initialize a session in us-west-2 that the SDK will use to load
 	// credentials from the shared credentials file ~/.aws/credentials.
-	// sess, err := session.NewSession(&aws.Config{
-	// 	Region: aws.String("ap-southeast-1")},
-	// )
-
-	// Create DynamoDB client
-	/* svc := dynamodb.New(sess)
-	devices, err := GetDevices(svc)
+	sess, err = session.NewSession(&aws.Config{
+		Region: aws.String("ap-southeast-1")},
+	)
 	if err != nil {
-		fmt.Println("Got error unmarshalling:")
+		fmt.Println("aws error ")
 		fmt.Println(err.Error())
 		os.Exit(1)
 	}
-	for _, i := range devices.Items {
-		device := Device{}
-		err := dynamodbattribute.UnmarshalMap(i, &device)
-		fmt.Printf(":: Name: %+v (%+v)\n", device.Name, device.Device)
-
-		result, err := GetHistory(svc, device.Device, 2)
-		// Make the DynamoDB Query API call
-		// fmt.Printf("result count item: %+v|%+v|", result.Count, result.ScannedCount)
-		for _, i := range result.Items {
-			item := Item{}
-
-			err = dynamodbattribute.UnmarshalMap(i, &item)
-
-			if err != nil {
-				fmt.Println("Got error unmarshalling:")
-				fmt.Println(err.Error())
-				os.Exit(1)
-			}
-
-			// fmt.Println("Found item:")
-			fmt.Println("  > Timestamp:  ", item.Timestamp,
-				"Data == Temp: ", item.Data.Temperature,
-				" | moisure: ", item.Data.Moisture)
-		}
-	} */
+
+	// Create DynamoDB client
+	svc = dynamodb.New(sess)
 
 	// func main() {
 	// session, err := r.Connect(r.ConnectOpts{
@@ -91,6 +105,8 @@ func main() {
 	// r.HandleFunc("/articles/{id}", handler).Methods("GET", "PUT")
 	// r.HandleFunc("/authors", handler).Queries("surname", "{surname}")
 	r.HandleFunc("/health", healthCheckHandler)
+	r.HandleFunc("/id/{id}", oneDeviceHandler)
+	r.HandleFunc("/all", overallHandler)
 	r.HandleFunc("/", indexHandler)
 	log.Fatal(http.ListenAndServe(":8000", r))
 }