main.go

// main.go
package main

import (
    "fmt"
		"encoding/json"
    "log"
    "net/http"
		"github.com/gorilla/mux"
		"io/ioutil"
)

// Article - Our struct for all articles
type Article struct {
    Id      string    `json:"Id"`
    Title   string `json:"Title"`
    Desc    string `json:"desc"`
    Content string `json:"content"`
}
var Articles []Article

// Home Page
func homePage(w http.ResponseWriter, r *http.Request){
    fmt.Fprintf(w, "Welcome to the HomePage!")
    fmt.Println("Endpoint Hit: homePage")
}
// Returns all articles
func returnAllArticles(w http.ResponseWriter, r *http.Request){
    fmt.Println("Endpoint Hit: returnAllArticles")
    json.NewEncoder(w).Encode(Articles)
}
// Return article by ID
func returnSingleArticle(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    key := vars["id"]

    // Loop over all of our Articles
    // if the article.Id equals the key we pass in
    // return the article encoded as JSON
    for _, article := range Articles {
        if article.Id == key {
            json.NewEncoder(w).Encode(article)
        }
    }
}
// Create New Article
func createNewArticle(w http.ResponseWriter, r *http.Request) {
    // get the body of our POST request
    // unmarshal this into a new Article struct
    // append this to our Articles array.
    reqBody, _ := ioutil.ReadAll(r.Body)
    var article Article
    json.Unmarshal(reqBody, &article)
    // update our global Articles array to include
    // our new Article
    Articles = append(Articles, article)

    json.NewEncoder(w).Encode(article)
}
// Delete Article
func deleteArticle(w http.ResponseWriter, r *http.Request) {
    // once again, we will need to parse the path parameters
    vars := mux.Vars(r)
    // we will need to extract the `id` of the article we
    // wish to delete
    id := vars["id"]

    // we then need to loop through all our articles
    for index, article := range Articles {
        // if our id path parameter matches one of our
        // articles
        if article.Id == id {
            // updates our Articles array to remove the
            // article
            Articles = append(Articles[:index], Articles[index+1:]...)
        }
    }
}

// Handle Requests
func handleRequests() {
    // creates a new instance of a mux router
    myRouter := mux.NewRouter().StrictSlash(true)
    // replace http.HandleFunc with myRouter.HandleFunc
    myRouter.HandleFunc("/", homePage)
    myRouter.HandleFunc("/all", returnAllArticles)

		myRouter.HandleFunc("/article", createNewArticle).Methods("POST")
		myRouter.HandleFunc("/article/{id}", deleteArticle).Methods("POST")
		myRouter.HandleFunc("/article/{id}", returnSingleArticle)
    // finally, instead of passing in nil, we want
    // to pass in our newly created router as the second
    // argument
    log.Fatal(http.ListenAndServe(":10000", myRouter))
}

func main() {
    Articles = []Article{
        Article{Id: "1", Title: "Hello", Desc: "Article Description", Content: "Article Content"},
        Article{Id: "2", Title: "Hello 2", Desc: "Article Description", Content: "Article Content"},
    }
    handleRequests()
}