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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"regexp"
"sort"
"strconv"
)
const (
VALID_ID_REGEX = `^[0-9]+$`
)
func indexGet(w http.ResponseWriter, r *http.Request) {
list := getRecipeList()
sort.Sort(list)
ServeTemplate(w, "index.html", list)
}
func recipeGet(w http.ResponseWriter, r *http.Request) {
ids := r.URL.Query()["id"]
if len(ids) != 1 {
msg := fmt.Sprintf("Exactly 1 'id' URL parameter expected but %d provided.", len(ids))
http.Error(w, msg, 400)
return
}
idStr := ids[0]
rec, err := getRecipe(idStr)
if err != nil {
http.Error(w, "Could not get recipe.", 400)
return
}
data := struct {
Id string
Recipe recipe
}{idStr, rec}
ServeTemplate(w, "recipe.html", data)
}
func recipeEditGet(w http.ResponseWriter, r *http.Request) {
ids := r.URL.Query()["id"]
if len(ids) != 1 {
msg := fmt.Sprintf("Exactly 1 'id' URL parameter expected but %d provided.", len(ids))
http.Error(w, msg, 400)
return
}
idStr := ids[0]
text, err := getRecipeText(idStr)
if err != nil {
http.Error(w, "Could not get recipe.", 400)
return
}
rec, err := getRecipe(idStr)
if err != nil {
http.Error(w, "Could not get recipe.", 400)
return
}
recipe := struct {
Id string
Title string
Text string
}{idStr, rec.Title, string(text)}
ServeTemplate(w, "recipe_edit.html", recipe)
}
func recipeEditPost(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
for _, v := range []string{"id", "text"} {
if len(r.Form[v]) != 1 {
http.Error(w, "Exactly 1 '"+v+"' form parameter expected.", 400)
return
}
}
idStr := r.Form["id"][0]
idRegex := regexp.MustCompile(VALID_ID_REGEX)
if !(idRegex.MatchString(idStr)) {
http.Error(w, "Bad 'id' URL parameter.", 400)
return
}
buffer := []byte(r.Form["text"][0])
err := json.Unmarshal(buffer, &recipe{})
if err != nil {
http.Error(w, "Text input could not be parsed to recipe.", 400)
return
}
textpath := filepath.Join(config.Data, "recipes", idStr, "text")
err = ioutil.WriteFile(textpath, buffer, 0644)
if err != nil {
http.Error(w, "Could not save new text for recipe.", 500)
}
http.Redirect(w, r, "/recipe?id="+idStr, 303)
}
func recipeConfirmDeletionGet(w http.ResponseWriter, r *http.Request) {
ids := r.URL.Query()["id"]
if len(ids) != 1 {
http.Error(w, "Exactly 1 'id' URL parameter expected.", 400)
return
}
ServeTemplate(w, "recipe_confirm_deletion.html", struct{ Id string }{ids[0]})
}
func recipeConfirmDeletionPost(w http.ResponseWriter, r *http.Request) {
ids := r.URL.Query()["id"]
if len(ids) != 1 {
http.Error(w, "Exactly 1 'id' URL parameter expected.", 400)
return
}
recipedir := filepath.Join(config.Data, "recipes", ids[0])
err := os.RemoveAll(recipedir)
if err != nil {
http.Error(w, "Could not delete recipe.", 500)
return
}
http.Redirect(w, r, "/index.html", 303)
}
func addRecipesGet(w http.ResponseWriter, r *http.Request) {
var biggest int = -1
entries, _ := os.ReadDir(filepath.Join(config.Data, "recipes"))
for _, v := range entries {
if v.IsDir() == false {
continue
}
number, err := strconv.Atoi(v.Name())
if err != nil {
continue
}
if number > biggest {
biggest = number
}
}
newId := biggest + 1
newIdStr := strconv.Itoa(newId)
recipedir := filepath.Join(config.Data, "recipes", newIdStr)
err := os.Mkdir(recipedir, 0755)
if err != nil {
http.Error(w, "Could not create new recipe!", 500)
return
}
textpath := filepath.Join(config.Data, "recipes", newIdStr, "text")
err = os.WriteFile(textpath, make([]byte, 0), 0644)
if err != nil {
http.Error(w, "Could not create new recipe!", 500)
return
}
redirect := fmt.Sprintf("/recipe/edit?id=%d", newId)
http.Redirect(w, r, redirect, 303)
}
func staticGet(w http.ResponseWriter, r *http.Request, filename string) {
path := filepath.Join(config.Static, filename)
http.ServeFile(w, r, path)
}
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