121 lines
2.7 KiB
Go
121 lines
2.7 KiB
Go
package main
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import (
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"net/http"
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"github.com/gin-gonic/gin"
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)
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// album represents data about a record album.
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type album struct {
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ID string `json:"id"`
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Title string `json:"title"`
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Artist string `json:"artist"`
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Price string `json:"price"`
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}
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// albums slice to seed record album data.
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var albums = []album{
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{ID: "1", Title: "Blue Train", Artist: "John Coltrane", Price: "56.99"},
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{ID: "2", Title: "Jeru", Artist: "Gerry Mulligan", Price: "17.99"},
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{ID: "3", Title: "Sarah Vaughan and Clifford Brown", Artist: "Sarah Vaughan", Price: "39.99"},
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}
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func remove(slice []album, s int) []album {
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return append(slice[:s], slice[s+1:]...)
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}
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func main() {
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router := gin.Default()
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router.GET("/albums", getAlbums)
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router.GET("/albums/:id", getAlbumByID)
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router.POST("/albums", postAlbums)
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router.DELETE("/albums", delAlbums)
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router.DELETE("/albums/:id", delAlbumByID)
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router.PATCH("/albums/:id", updateAlbum)
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router.Run("localhost:8080")
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}
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// getAlbums responds with the list of all albums as JSON.
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func getAlbums(c *gin.Context) {
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c.JSON(http.StatusOK, albums)
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}
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// postAlbums adds an album from JSON received in the request body.
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func postAlbums(c *gin.Context) {
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var newAlbum album
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// Call BindJSON to bind the received JSON to
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// newAlbum.
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if err := c.BindJSON(&newAlbum); err != nil {
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c.Status(http.StatusBadRequest)
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return
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}
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for _, a := range albums {
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if a == newAlbum {
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c.Status(http.StatusBadRequest)
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return
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}
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}
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// Add the new album to the slice.
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albums = append(albums, newAlbum)
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c.JSON(http.StatusCreated, newAlbum)
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}
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// getAlbumByID locates the album whose ID value matches the id
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// parameter sent by the client, then returns that album as a response.
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func getAlbumByID(c *gin.Context) {
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id := c.Param("id")
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// Loop through the list of albums, looking for
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// an album whose ID value matches the parameter.
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for _, a := range albums {
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if a.ID == id {
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c.JSON(http.StatusOK, a)
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return
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}
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}
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c.JSON(http.StatusNotFound, gin.H{"message": "album not found"})
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}
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func delAlbums(c *gin.Context) {
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albums = []album{}
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c.JSON(http.StatusOK, albums)
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}
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func delAlbumByID(c *gin.Context) {
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id := c.Param("id")
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for s, a := range albums {
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if a.ID == id {
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albums = remove(albums, s)
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c.JSON(http.StatusCreated, albums)
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return
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}
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}
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c.JSON(http.StatusNotFound, gin.H{"message": "album not found"})
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}
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func updateAlbum(c *gin.Context) {
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id := c.Param("id")
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var newAlbum album
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if err := c.BindJSON(&newAlbum); err != nil {
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return
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}
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for s, a := range albums {
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if a.ID == id {
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albums = remove(albums, s)
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albums = append(albums, newAlbum)
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c.JSON(http.StatusCreated, newAlbum)
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return
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}
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}
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c.JSON(http.StatusNotFound, gin.H{"message": "album not found"})
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}
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