added flags!

main.go

@@ -2,7 +2,11 @@ package main
 
 import (
 	"encoding/json"
+	"flag"
 	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
 	"os"
 )
 
@@ -67,49 +71,33 @@ type Sys struct {
 }
 
 func main() {
-	/*
-		//setting up openweathermap api
-		lat := "56.122970"
-		lon := "-3.932390"
-		//city := "Stirling, uk"
-		api_key := "29e5139b86638988d333a28ba360bfd9"
-		full := "https://api.openweathermap.org/data/2.5/weather?lat=" + lat + "&lon=" + lon + "&appid=" + api_key + ""
-		fmt.Printf("\n------\nWeather url: %+s\n---------\n", full)
-
-		//read webpage
-		url := full
-		resp, err := http.Get(url)
-		//reads html as a slice of bytes
-		html, err := ioutil.ReadAll(resp.Body)
-		if err != nil {
-			panic(err)
-		}
-		//print the html
-		//fmt.Printf("%s\n", html)
-
-	*/
-	/*
-		jsonFile, err := os.Open("stirling.json")
-		// if we os.Open returns an error then handle it
-		if err != nil {
-			fmt.Println(err)
-		}
-		fmt.Println("Successfully Opened stirling.json")
-		defer jsonFile.Close()
-		byteValue, _ := ioutil.ReadAll(jsonFile)
-
-		var data WeatherAPI
-
-		error := json.Unmarshal([]byte(byteValue), &data)
-		if error != nil {
-			fmt.Println(error)
-			return
-		}
-		//json.Unmarshal(byteValue, &data)
-
-		fmt.Println(data)
-	*/
-	data, _ := LoadConfiguration("./stirling.json")
+	//set up the flags for the program to use!
+	var city, code string
+	flag.StringVar(&city, "city", "London", "Enter city e.g. London, Glasgow etc...")
+	flag.StringVar(&code, "code", "uk", "Enter Code e.g. uk, us etc...")
+
+	flag.Parse()
+	//setting up openweathermap api
+	api_key := "29e5139b86638988d333a28ba360bfd9"
+	full := "https://api.openweathermap.org/data/2.5/weather?q=" + city + "," + code + "&units=metric" + "&appid=" + api_key + ""
+	fmt.Printf("\n------\nWeather url: %+s\n---------\n", full)
+
+	//read webpage
+	url := full
+	resp, err := http.Get(url)
+	//reads html as a slice of bytes
+	html, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		panic(err)
+	}
+	//print the html
+	fmt.Printf("%s\n", html)
+	fmt.Println("---------- JSON PARSED -----------\n\n")
+
+	//output the html to stirling.json
+	CreateFile(string(html))
+
+	data, _ := LoadConfiguration("weather.json")
 	fmt.Println(data)
 }
 func LoadConfiguration(file string) (WeatherAPI, error) {
@@ -122,3 +110,39 @@ func LoadConfiguration(file string) (WeatherAPI, error) {
 	jsonParser.Decode(&config)
 	return config, err
 }
+func CreateFile(fileContents string) {
+
+	// fmt package implements formatted
+	// I/O and has functions like Printf
+	// and Scanf
+	fmt.Printf("Writing to a file in Go lang\n")
+
+	// in case an error is thrown it is received
+	// by the err variable and Fatalf method of
+	// log prints the error message and stops
+	// program execution
+	file, err := os.Create("weather.json")
+
+	if err != nil {
+		log.Fatalf("failed creating file: %s", err)
+	}
+
+	// Defer is used for purposes of cleanup like
+	// closing a running file after the file has
+	// been written and main //function has
+	// completed execution
+	defer file.Close()
+
+	// len variable captures the length
+	// of the string written to the file.
+	len, err := file.WriteString(fileContents)
+
+	if err != nil {
+		log.Fatalf("failed writing to file: %s", err)
+	}
+
+	// Name() method returns the name of the
+	// file as presented to Create() method.
+	fmt.Printf("\nFile Name: %s", file.Name())
+	fmt.Printf("\nLength: %d bytes", len)
+}