714 lines
17 KiB
Go
714 lines
17 KiB
Go
package utils
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import (
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"database/sql"
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"errors"
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"fmt"
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"html/template"
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"io"
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"net/http"
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"os"
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"path"
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"strings"
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"time"
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dbtypes "git.andr3h3nriqu3s.com/andr3/fyp/logic/db_types"
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"github.com/charmbracelet/log"
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"github.com/goccy/go-json"
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)
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func Mul(n1 int, n2 int) int {
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return n1 * n2
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}
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func Add(n1 int, n2 int) int {
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return n1 + n2
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}
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func baseLoadTemplate(base string, path string) (*template.Template, any) {
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funcs := map[string]any{
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"startsWith": strings.HasPrefix,
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"replace": strings.Replace,
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"mul": Mul,
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"add": Add,
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}
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return template.New(base).Funcs(funcs).ParseFiles(
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"./views/"+base,
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"./views/"+path,
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"./views/partials/header.html",
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)
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}
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func loadTemplate(path string) (*template.Template, any) {
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return baseLoadTemplate("layout.html", path)
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}
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func LoadView(writer http.ResponseWriter, path string, data interface{}) {
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tmpl, err := loadTemplate(path)
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if err != nil {
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fmt.Printf("Failed to load view %s\n", path)
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fmt.Println(err)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadView(writer, "500.html", nil)
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}
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return
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}
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if err := tmpl.Execute(writer, data); err != nil {
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fmt.Printf("Failed to load view %s\n", path)
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fmt.Println(err)
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writer.WriteHeader(http.StatusInternalServerError)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadView(writer, "500.html", nil)
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}
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return
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}
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}
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/** Only returns the html without template */
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func LoadHtml(writer http.ResponseWriter, path string, data interface{}) {
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tmpl, err := baseLoadTemplate("html.html", path)
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if err != nil {
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fmt.Printf("Failed to load template %s\n", path)
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fmt.Println(err)
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writer.WriteHeader(http.StatusInternalServerError)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadHtml(writer, "500.html", nil)
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}
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return
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}
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if err := tmpl.Execute(writer, data); err != nil {
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fmt.Printf("Failed to execute template %s\n", path)
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fmt.Println(err)
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writer.WriteHeader(http.StatusInternalServerError)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadHtml(writer, "500.html", nil)
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}
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return
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}
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}
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func LoadDefineTemplate(writer http.ResponseWriter, path string, base string, data AnyMap) {
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if data == nil {
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data = map[string]interface{}{
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"Error": true,
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}
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} else {
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data["Error"] = true
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}
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funcs := map[string]any{
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"startsWith": strings.HasPrefix,
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"mul": Mul,
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"replace": strings.Replace,
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"add": Add,
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}
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tmpl, err := template.New("").Funcs(funcs).Parse("{{template \"" + base + "\" . }}")
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if err != nil {
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panic("Lol")
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}
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tmpl, err = tmpl.ParseFiles(
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"./views/"+path,
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"./views/partials/header.html",
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)
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if err != nil {
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fmt.Printf("Failed to load template %s\n", path)
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fmt.Println(err)
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writer.WriteHeader(http.StatusInternalServerError)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadHtml(writer, "500.html", nil)
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}
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return
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}
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if err := tmpl.Execute(writer, data); err != nil {
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fmt.Printf("Failed to execute template %s\n", path)
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fmt.Println(err)
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writer.WriteHeader(http.StatusInternalServerError)
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if path == "500.html" {
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writer.Write([]byte("<h1>Failed to load 500.html check console for more info</h1>"))
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} else {
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LoadHtml(writer, "500.html", nil)
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}
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return
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}
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}
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type AnyMap = map[string]interface{}
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type Error struct {
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Code int
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Msg *string
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data AnyMap
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}
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type AnswerType int
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const (
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NORMAL AnswerType = 1 << iota
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HTML
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JSON
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HTMLFULL
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)
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func LoadBasedOnAnswer(ans AnswerType, w http.ResponseWriter, path string, data map[string]interface{}) {
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if ans == NORMAL {
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LoadView(w, path, data)
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return
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} else if ans == HTML {
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LoadHtml(w, path, data)
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return
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} else if ans == HTMLFULL {
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if data == nil {
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LoadHtml(w, path, map[string]interface{}{
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"App": true,
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})
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} else {
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data["App"] = true
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LoadHtml(w, path, data)
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}
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return
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} else if ans == JSON {
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panic("TODO JSON!")
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} else {
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panic("unreachable")
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}
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}
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type HandleFunc struct {
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path string
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mode AnswerType
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fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error
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}
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type Handler interface {
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New()
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Startup()
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Get(fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error)
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Post(fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error)
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}
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type Handle struct {
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Db *sql.DB
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gets []HandleFunc
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posts []HandleFunc
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deletes []HandleFunc
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}
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func decodeBody(r *http.Request) (string, *Error) {
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body, err := io.ReadAll(r.Body)
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if err == nil {
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return "", &Error{Code: http.StatusBadRequest}
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}
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return string(body[:]), nil
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}
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func handleError(err *Error, w http.ResponseWriter, context *Context) {
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if err != nil {
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data := context.AddMap(err.data)
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if err.Code == http.StatusNotFound {
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if context.Mode == HTML {
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w.WriteHeader(309)
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context.Mode = HTMLFULL
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}
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LoadBasedOnAnswer(context.Mode, w, "404.html", data)
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return
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}
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w.WriteHeader(err.Code)
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if err.Code == http.StatusBadRequest {
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LoadBasedOnAnswer(context.Mode, w, "400.html", data)
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return
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}
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if err.Msg != nil {
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w.Write([]byte(*err.Msg))
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}
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}
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}
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func (x *Handle) Get(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.gets = append(x.gets, HandleFunc{path, NORMAL | HTML | HTMLFULL | JSON, fn})
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}
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func (x *Handle) GetHTML(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.gets = append(x.gets, HandleFunc{path, NORMAL | HTML | HTMLFULL, fn})
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}
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func (x *Handle) GetJSON(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.gets = append(x.gets, HandleFunc{path, JSON, fn})
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}
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func (x *Handle) Post(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.posts = append(x.posts, HandleFunc{path, NORMAL | HTML | HTMLFULL | JSON, fn})
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}
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func (x *Handle) PostHTML(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.posts = append(x.posts, HandleFunc{path, NORMAL | HTML | HTMLFULL, fn})
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}
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func (x *Handle) PostJSON(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.posts = append(x.posts, HandleFunc{path, JSON, fn})
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}
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func (x *Handle) Delete(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.deletes = append(x.deletes, HandleFunc{path, NORMAL | HTML | HTMLFULL | JSON, fn})
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}
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func (x *Handle) DeleteHTML(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.deletes = append(x.deletes, HandleFunc{path, NORMAL | HTML | HTMLFULL, fn})
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}
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func (x *Handle) DeleteJSON(path string, fn func(w http.ResponseWriter, r *http.Request, c *Context) *Error) {
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x.deletes = append(x.deletes, HandleFunc{path, JSON, fn})
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}
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func (x *Handle) handleGets(w http.ResponseWriter, r *http.Request, context *Context) {
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for _, s := range x.gets {
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if s.path == r.URL.Path && context.Mode&s.mode != 0 {
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handleError(s.fn(w, r, context), w, context)
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return
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}
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}
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if context.Mode != HTMLFULL {
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w.WriteHeader(http.StatusNotFound)
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}
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LoadBasedOnAnswer(context.Mode, w, "404.html", context.AddMap(nil))
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}
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func (x *Handle) handlePosts(w http.ResponseWriter, r *http.Request, context *Context) {
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for _, s := range x.posts {
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if s.path == r.URL.Path && context.Mode&s.mode != 0 {
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handleError(s.fn(w, r, context), w, context)
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return
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}
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}
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if context.Mode != HTMLFULL {
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w.WriteHeader(http.StatusNotFound)
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}
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LoadBasedOnAnswer(context.Mode, w, "404.html", context.AddMap(nil))
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}
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func (x *Handle) handleDeletes(w http.ResponseWriter, r *http.Request, context *Context) {
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for _, s := range x.deletes {
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if s.path == r.URL.Path && context.Mode&s.mode != 0 {
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handleError(s.fn(w, r, context), w, context)
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return
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}
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}
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if context.Mode != HTMLFULL {
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w.WriteHeader(http.StatusNotFound)
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}
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LoadBasedOnAnswer(context.Mode, w, "404.html", context.AddMap(nil))
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}
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func CheckAuthLevel(authLevel int, w http.ResponseWriter, r *http.Request, c *Context) bool {
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if authLevel > 0 {
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if c.requireAuth(w, r) {
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Logoff(c.Mode, w, r)
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return false
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}
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if c.User.UserType < authLevel {
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notAuth(c.Mode, w, r)
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return false
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}
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}
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return true
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}
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func AnswerTemplate(path string, data AnyMap, authLevel int) func(w http.ResponseWriter, r *http.Request, c *Context) *Error {
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return func(w http.ResponseWriter, r *http.Request, c *Context) *Error {
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if !CheckAuthLevel(authLevel, w, r, c) {
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return nil
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}
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LoadBasedOnAnswer(c.Mode, w, path, c.AddMap(data))
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return nil
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}
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}
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type Context struct {
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Token *string
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User *dbtypes.User
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Mode AnswerType
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Logger *log.Logger
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Db *sql.DB
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}
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func (c Context) ToJSON(r *http.Request, dat any) *Error {
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decoder := json.NewDecoder(r.Body)
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err := decoder.Decode(dat)
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if err != nil {
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return c.Error500(err)
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}
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return nil
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}
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func (c Context) SendJSON(w http.ResponseWriter, dat any) *Error {
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w.Header().Add("content-type", "application/json")
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text, err := json.Marshal(dat)
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if err != nil {
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return c.Error500(err)
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}
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if _, err = w.Write(text); err != nil {
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return c.Error500(err)
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}
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return nil
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}
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func (c Context) SendJSONStatus(w http.ResponseWriter, status int, dat any) *Error {
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w.Header().Add("content-type", "application/json")
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w.WriteHeader(status)
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text, err := json.Marshal(dat)
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if err != nil {
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return c.Error500(err)
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}
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if _, err = w.Write(text); err != nil {
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return c.Error500(err)
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}
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return nil
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}
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func (c Context) JsonBadRequest(w http.ResponseWriter, dat any) *Error {
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return c.SendJSONStatus(w, http.StatusBadRequest, dat)
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}
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func (c Context) Error400(err error, message string, w http.ResponseWriter, path string, base string, data AnyMap) *Error {
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c.SetReportCaller(true)
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c.Logger.Error(message)
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c.SetReportCaller(false)
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if err != nil {
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c.Logger.Errorf("Something went wrong returning with: %d\n.Err:\n", http.StatusBadRequest)
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c.Logger.Error(err)
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}
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if c.Mode == JSON {
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return &Error{http.StatusBadRequest, nil, c.AddMap(data)}
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}
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LoadDefineTemplate(w, path, base, c.AddMap(data))
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return nil
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}
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func (c Context) SetReportCaller(report bool) {
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if report {
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c.Logger.SetCallerOffset(2)
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c.Logger.SetReportCaller(true)
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} else {
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c.Logger.SetCallerOffset(1)
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c.Logger.SetReportCaller(false)
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}
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}
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func (c Context) ErrorCode(err error, code int, data AnyMap) *Error {
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if code == 400 {
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c.SetReportCaller(true)
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c.Logger.Warn("When returning BadRequest(400) please use context.Error400\n")
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c.SetReportCaller(false)
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}
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if err != nil {
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c.Logger.Errorf("Something went wrong returning with: %d\n.Err:\n", code)
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c.Logger.Error(err)
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}
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return &Error{code, nil, c.AddMap(data)}
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}
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func (c Context) UnsafeErrorCode(err error, code int, data AnyMap) *Error {
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if err != nil {
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c.Logger.Errorf("Something went wrong returning with: %d\n.Err:\n", code)
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c.Logger.Error(err)
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}
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return &Error{code, nil, c.AddMap(data)}
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}
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func (c Context) Error500(err error) *Error {
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return c.ErrorCode(err, http.StatusInternalServerError, nil)
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}
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func (c Context) AddMap(m AnyMap) AnyMap {
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if m == nil {
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return map[string]interface{}{
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"Context": c,
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}
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}
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m["Context"] = c
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return m
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}
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func (c *Context) requireAuth(w http.ResponseWriter, r *http.Request) bool {
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if c.User == nil {
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return true
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}
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return false
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}
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var LogoffError = errors.New("Invalid token!")
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func (x Handle) createContext(handler *Handle, mode AnswerType, r *http.Request) (*Context, error) {
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var token *string
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logger := log.NewWithOptions(os.Stdout, log.Options{
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ReportCaller: true,
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ReportTimestamp: true,
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TimeFormat: time.Kitchen,
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Prefix: r.URL.Path,
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})
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if mode != JSON {
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for _, r := range r.Cookies() {
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if r.Name == "auth" {
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token = &r.Value
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}
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}
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} else {
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t := r.Header.Get("token")
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if t != "" {
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token = &t
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}
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}
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// TODO check that the token is still valid
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if token == nil {
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return &Context{
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Mode: mode,
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Logger: logger,
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Db: handler.Db,
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}, nil
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}
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user, err := dbtypes.UserFromToken(x.Db, *token)
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if err != nil {
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return nil, errors.Join(err, LogoffError)
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}
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return &Context{token, user, mode, logger, handler.Db}, nil
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}
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// TODO check if I can use http.Redirect
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func Redirect(path string, mode AnswerType, w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Location", path)
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if mode == JSON {
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w.WriteHeader(http.StatusSeeOther)
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w.Write([]byte(path))
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return
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}
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if mode&(HTMLFULL|HTML) != 0 {
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w.Header().Add("HX-Redirect", path)
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w.WriteHeader(204)
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} else {
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w.WriteHeader(http.StatusSeeOther)
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}
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}
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func Logoff(mode AnswerType, w http.ResponseWriter, r *http.Request) {
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if (mode == JSON) {
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w.WriteHeader(http.StatusUnauthorized)
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w.Write([]byte("\"Not Authorized\""))
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} else {
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// Delete cookie
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cookie := &http.Cookie{
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Name: "auth",
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Value: "",
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Expires: time.Unix(0, 0),
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}
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http.SetCookie(w, cookie)
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Redirect("/login", mode, w, r)
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}
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}
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func notAuth(mode AnswerType, w http.ResponseWriter, r *http.Request) {
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if mode == JSON {
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w.WriteHeader(http.StatusForbidden)
|
|
w.Write([]byte("\"You can not access this resource!\""))
|
|
return
|
|
}
|
|
if mode&(HTMLFULL|HTML) != 0 {
|
|
w.WriteHeader(http.StatusForbidden)
|
|
w.Write([]byte("You can not access this resource!"))
|
|
} else {
|
|
w.WriteHeader(http.StatusForbidden)
|
|
}
|
|
}
|
|
|
|
func (x Handle) StaticFiles(pathTest string, fileType string, contentType string) {
|
|
http.HandleFunc(pathTest, func(w http.ResponseWriter, r *http.Request) {
|
|
path := r.URL.Path[len(pathTest):]
|
|
|
|
if !strings.HasSuffix(path, fileType) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
w.Write([]byte("File not found"))
|
|
return
|
|
}
|
|
|
|
t, err := template.ParseFiles("./views" + pathTest + path)
|
|
|
|
if err != nil {
|
|
w.WriteHeader(http.StatusInternalServerError)
|
|
w.Write([]byte("Failed to load template"))
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", contentType+"; charset=utf-8")
|
|
t.Execute(w, nil)
|
|
})
|
|
}
|
|
|
|
func ErrorCode(err error, code int, data AnyMap) *Error {
|
|
log.Warn("This function is deprecated please use the one provided by context")
|
|
// TODO Improve Logging
|
|
if err != nil {
|
|
fmt.Printf("Something went wrong returning with: %d\n.Err:\n", code)
|
|
fmt.Println(err)
|
|
}
|
|
return &Error{code, nil, data}
|
|
}
|
|
|
|
func Error500(err error) *Error {
|
|
log.Warn("This function is deprecated please use the one provided by context")
|
|
return ErrorCode(err, http.StatusInternalServerError, nil)
|
|
}
|
|
|
|
func (x Handle) ReadFiles(pathTest string, baseFilePath string, fileType string, contentType string) {
|
|
http.HandleFunc(pathTest, func(w http.ResponseWriter, r *http.Request) {
|
|
user_path := r.URL.Path[len(pathTest):]
|
|
|
|
// fmt.Printf("Requested path: %s\n", user_path)
|
|
|
|
if !strings.HasSuffix(user_path, fileType) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
w.Write([]byte("File not found"))
|
|
return
|
|
}
|
|
|
|
bytes, err := os.ReadFile(path.Join(baseFilePath, pathTest, user_path))
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
w.WriteHeader(http.StatusInternalServerError)
|
|
w.Write([]byte("Failed to load file"))
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", contentType)
|
|
w.Write(bytes)
|
|
})
|
|
}
|
|
|
|
func (x Handle) ReadTypesFiles(pathTest string, baseFilePath string, fileTypes []string, contentTypes []string) {
|
|
http.HandleFunc(pathTest, func(w http.ResponseWriter, r *http.Request) {
|
|
user_path := r.URL.Path[len(pathTest):]
|
|
|
|
// fmt.Printf("Requested path: %s\n", user_path)
|
|
|
|
found := false
|
|
index := -1
|
|
|
|
for i, fileType := range fileTypes {
|
|
if strings.HasSuffix(user_path, fileType) {
|
|
found = true
|
|
index = i
|
|
break
|
|
}
|
|
}
|
|
|
|
if !found {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
w.Write([]byte("File not found"))
|
|
return
|
|
}
|
|
|
|
bytes, err := os.ReadFile(path.Join(baseFilePath, pathTest, user_path))
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
w.WriteHeader(http.StatusInternalServerError)
|
|
w.Write([]byte("Failed to load file"))
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", contentTypes[index])
|
|
w.Write(bytes)
|
|
})
|
|
}
|
|
|
|
func NewHandler(db *sql.DB) *Handle {
|
|
|
|
var gets []HandleFunc
|
|
var posts []HandleFunc
|
|
var deletes []HandleFunc
|
|
x := &Handle{db, gets, posts, deletes}
|
|
|
|
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
// Decide answertype
|
|
ans := NORMAL
|
|
if r.Header.Get("HX-Request") == "true" || r.Header.Get("Request-Type") == "html" {
|
|
ans = HTML
|
|
}
|
|
if r.Header.Get("Request-Type") == "htmlfull" {
|
|
ans = HTMLFULL
|
|
}
|
|
if r.Header.Get("content-type") == "application/json" {
|
|
ans = JSON
|
|
}
|
|
|
|
//TODO JSON
|
|
|
|
//Login state
|
|
context, err := x.createContext(x, ans, r)
|
|
if err != nil {
|
|
Logoff(ans, w, r)
|
|
return
|
|
}
|
|
|
|
w.Header().Add("Access-Control-Allow-Origin", "*")
|
|
w.Header().Add("Access-Control-Allow-Headers", "*")
|
|
|
|
if r.Method == "GET" {
|
|
x.handleGets(w, r, context)
|
|
return
|
|
}
|
|
if r.Method == "POST" {
|
|
x.handlePosts(w, r, context)
|
|
return
|
|
}
|
|
if r.Method == "DELETE" {
|
|
x.handleDeletes(w, r, context)
|
|
return
|
|
}
|
|
if r.Method == "OPTIONS" {
|
|
return
|
|
}
|
|
panic("TODO handle method: " + r.Method)
|
|
})
|
|
|
|
return x
|
|
}
|
|
|
|
func (x Handle) Startup() {
|
|
log.Info("Starting up!\n")
|
|
|
|
port := os.Getenv("PORT")
|
|
if port == "" {
|
|
port = "8000"
|
|
}
|
|
|
|
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", port), nil))
|
|
}
|