419 lines
12 KiB
Go
419 lines
12 KiB
Go
package blog
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import (
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"database/sql"
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"encoding/json"
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"fmt"
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"github.com/go-chi/chi"
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"github.com/go-chi/jwtauth"
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"github.com/go-chi/render"
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"github.com/gosimple/slug"
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"net/http"
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"strings"
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"time"
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)
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var (
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DB *sql.DB
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TokenAuth *jwtauth.JWTAuth
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)
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type BlogPost struct {
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ID int `json:"id",db:"id"`
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Title string `json:"title",db:"title"`
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Slug string `json:"slug",db:"slug"`
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Author string `json:"author",db:"author"`
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Content string `json:"content",db:"content"`
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TimePublished time.Time `json:"time_published", db:"time_published"`
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Modified bool `json:"modified", db:"modified"`
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TimeModified time.Time `json:"last_modified", db:"last_modified"`
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}
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type BlogPosts []BlogPost
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type Tag struct {
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TagList string `json:"tags"`
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}
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type NewBlogPost struct {
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Title string `json:"title",db:"title"`
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Content string `json:"content",db:"content"`
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Tags string `json:"tags"`
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Author string `json:"author",db:"author"`
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}
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type ReturnError struct {
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Message string `json:"error"`
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}
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type ReturnSuccess struct {
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Message string `json:"success"`
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ID int `json:"id"`
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}
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type ReferenceID struct {
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LastID int `json:"last_id"`
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}
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func Init() {
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createPostsTable := `
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CREATE TABLE IF NOT EXISTS posts
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(id SERIAL PRIMARY KEY,
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title text,
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slug text,
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author text REFERENCES users (username),
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content text,
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time_published timestamp,
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modified bool,
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last_modified timestamp)`
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DB.Exec(createPostsTable)
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createTagsTable := `
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CREATE TABLE IF NOT EXISTS tags
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(id SERIAL PRIMARY KEY,
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tag text,
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article_id int REFERENCES posts (id))`
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DB.Exec(createTagsTable)
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}
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func Routes() *chi.Mux {
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r := chi.NewRouter()
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r.Group(func(r chi.Router) {
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r.Use(jwtauth.Verifier(TokenAuth))
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r.Use(jwtauth.Authenticator)
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r.Post("/", createBlogPost)
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r.Patch("/by-id/{id}", updateBlogPostById)
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})
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r.Get("/", getBlogPosts)
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r.Get("/by-slug/{slug}", getBlogPostBySlug)
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r.Get("/by-id/{id}", getBlogPostById)
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r.Get("/by-tag/{tag}", getBlogPostsByTag)
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r.Get("/by-author/{author}", getBlogPostsByAuthor)
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return r
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}
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func createBlogPost(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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newBlogPost := &NewBlogPost{}
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// basic checks
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_, claims, _ := jwtauth.FromContext(r.Context())
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username := claims["username"].(string)
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err := json.NewDecoder(r.Body).Decode(newBlogPost)
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if err != nil {
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returnError.Message = "unknown error, try again later"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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if newBlogPost.Title == "" {
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returnError.Message = "title is required"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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if newBlogPost.Content == "" {
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returnError.Message = "content is required"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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as := slug.Make(newBlogPost.Title)
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slugCheck := DB.QueryRow("SELECT id FROM posts WHERE slug=$1", as)
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// wow this is ugly. someone pls send help.
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// checking to ensure the same slug doesn't exist...
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scr := 0
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err = slugCheck.Scan(&scr)
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if err == nil {
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returnError.Message = "slug already exists"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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if err != nil {
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if err != sql.ErrNoRows {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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}
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s := `INSERT INTO posts (title, slug, author, content, time_published, modified, last_modified)
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VALUES ($1, $2, $3, $4, $5, $6, $7)
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RETURNING id`
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article_id := 0
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// write the row and get back the id
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err = DB.QueryRow(s, newBlogPost.Title, as, username, newBlogPost.Content, time.Now().UTC(), false, time.Now().UTC()).Scan(&article_id)
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if err != nil {
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if err == sql.ErrNoRows {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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// if the article has tags
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if newBlogPost.Tags != "" {
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t := `INSERT INTO tags (tag, article_id)
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VALUES ($1, $2)`
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tags := strings.Split(newBlogPost.Tags, ",")
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for i := range tags {
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DB.Exec(t, tags[i], article_id)
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}
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}
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returnSuccess := ReturnSuccess{Message: "post created", ID: article_id}
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w.WriteHeader(http.StatusCreated)
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render.JSON(w, r, returnSuccess)
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return
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}
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func updateBlogPostById(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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// Get the actual post
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id := chi.URLParam(r, "id")
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result := DB.QueryRow("SELECT id, title, slug, author, content, time_published FROM posts WHERE id=$1", id)
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post := BlogPost{}
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err := result.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished)
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if err != nil {
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if err == sql.ErrNoRows {
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returnError.Message = "blog post requested for update not found"
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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// Verify the post belongs to the requester
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_, claims, _ := jwtauth.FromContext(r.Context())
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username := claims["username"].(string)
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if username != post.Author {
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returnError.Message = "unauthorized..."
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w.WriteHeader(http.StatusUnauthorized)
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render.JSON(w, r, returnError)
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return
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}
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// update the post struct
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err = json.NewDecoder(r.Body).Decode(&post)
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s := `
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UPDATE posts SET
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title = $1,
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content = $2,
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modified = $3,
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last_modified = $4
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WHERE id = $5`
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// write the row update
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_, err = DB.Exec(s, post.Title, post.Content, true, time.Now().UTC(), post.ID)
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if err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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returnSuccess := ReturnSuccess{Message: "post updated", ID: post.ID}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, returnSuccess)
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return
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}
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// This will search by the last id seen, descending.
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func getBlogPosts(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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referenceID := &ReferenceID{}
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err := json.NewDecoder(r.Body).Decode(referenceID)
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// hardcode 9001 for cool kid points
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if err != nil {
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referenceID.LastID = 9001
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}
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search_id := referenceID.LastID
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// if someone is lame and sends up a negative number...
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if search_id < 1 {
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search_id = 9001
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}
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search := `
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SELECT id, title, slug, author, content, time_published, modified, last_modified
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FROM posts
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WHERE id < $1
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ORDER BY id DESC
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FETCH FIRST 10 ROWS ONLY
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`
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rows, err := DB.Query(search, search_id)
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if err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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defer rows.Close()
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post := BlogPost{}
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posts := make(BlogPosts, 0)
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for rows.Next() {
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if err := rows.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished, &post.Modified, &post.TimeModified); err != nil {
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}
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posts = append(posts, post)
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}
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if err := rows.Err(); err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, posts)
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return
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}
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func getBlogPostBySlug(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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slug := chi.URLParam(r, "slug")
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result := DB.QueryRow("SELECT id, title, slug, author, content, time_published, modified, last_modified FROM posts WHERE slug=$1", slug)
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post := BlogPost{}
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err := result.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished, &post.Modified, &post.TimeModified)
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if err != nil {
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returnError.Message = "post not found"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, post)
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return
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}
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func getBlogPostById(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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id := chi.URLParam(r, "id")
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result := DB.QueryRow("SELECT id, title, slug, author, content, time_published, modified, last_modified FROM posts WHERE id=$1", id)
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post := BlogPost{}
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err := result.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished, &post.Modified, &post.TimeModified)
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if err != nil {
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returnError.Message = "post not found"
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w.WriteHeader(http.StatusBadRequest)
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render.JSON(w, r, returnError)
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return
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}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, post)
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return
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}
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func getBlogPostsByTag(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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referenceID := &ReferenceID{}
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err := json.NewDecoder(r.Body).Decode(referenceID)
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// hardcode 9001 for cool kid points
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if err != nil {
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referenceID.LastID = 9001
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}
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search_id := referenceID.LastID
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// if someone is lame and sends up a negative number...
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if search_id < 1 {
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search_id = 9001
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}
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tag := chi.URLParam(r, "tag")
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search := `
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SELECT posts.id, posts.title, posts.slug, posts.author, posts.content, posts.time_published, posts.modified, posts.last_modified
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FROM posts
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INNER JOIN tags on posts .id = tags.article_id
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WHERE posts.id < $1
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AND tags.tag = $2
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ORDER BY id DESC
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FETCH FIRST 10 ROWS ONLY
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`
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rows, err := DB.Query(search, search_id, tag)
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if err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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defer rows.Close()
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post := BlogPost{}
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posts := make(BlogPosts, 0)
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for rows.Next() {
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if err := rows.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished, &post.Modified, &post.TimeModified); err != nil {
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}
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posts = append(posts, post)
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}
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if err := rows.Err(); err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, posts)
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return
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}
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func getBlogPostsByAuthor(w http.ResponseWriter, r *http.Request) {
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returnError := ReturnError{}
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referenceID := &ReferenceID{}
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err := json.NewDecoder(r.Body).Decode(referenceID)
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// hardcode 9001 for cool kid points
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if err != nil {
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referenceID.LastID = 9001
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}
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search_id := referenceID.LastID
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// if someone is lame and sends up a negative number...
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if search_id < 1 {
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search_id = 9001
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}
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author := chi.URLParam(r, "author")
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search := `
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SELECT id, title, slug, author, content, time_published, modified, last_modified
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FROM posts
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WHERE id < $1
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AND author = $2
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ORDER BY id DESC
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FETCH FIRST 10 ROWS ONLY
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`
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rows, err := DB.Query(search, search_id, author)
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if err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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defer rows.Close()
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post := BlogPost{}
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posts := make(BlogPosts, 0)
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for rows.Next() {
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if err := rows.Scan(&post.ID, &post.Title, &post.Slug, &post.Author, &post.Content, &post.TimePublished, &post.Modified, &post.TimeModified); err != nil {
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}
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posts = append(posts, post)
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}
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if err := rows.Err(); err != nil {
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returnError.Message = "something is super broken..."
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w.WriteHeader(http.StatusInternalServerError)
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render.JSON(w, r, returnError)
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fmt.Println(err)
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return
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}
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w.WriteHeader(http.StatusOK)
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render.JSON(w, r, posts)
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return
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}
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func getRssFeed(w http.ResponseWriter, r *http.Request) {
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return
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}
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