Move old backend code to old_src folder

Signed-off-by: David Mehren <git@herrmehren.de>

old_src/lib/errors.ts

@@ -0,0 +1,54 @@
+import { config } from './config'
+
+function responseError (res, code: number, detail: string, msg: string): void {
+  res.status(code).render('error.ejs', {
+    title: code + ' ' + detail + ' ' + msg,
+    code: code,
+    detail: detail,
+    msg: msg,
+    opengraph: []
+  })
+}
+
+function errorForbidden (res): void {
+  const { req } = res
+  if (req.user) {
+    responseError(res, 403, 'Forbidden', 'oh no.')
+  } else {
+    if (!req.session) req.session = {}
+    req.session.returnTo = req.originalUrl || config.serverUrl + '/'
+    req.flash('error', 'You are not allowed to access this page. Maybe try logging in?')
+    res.redirect(config.serverURL + '/')
+  }
+}
+
+function errorNotFound (res): void {
+  responseError(res, 404, 'Not Found', 'oops.')
+}
+
+function errorBadRequest (res): void {
+  responseError(res, 400, 'Bad Request', 'something not right.')
+}
+
+function errorTooLong (res): void {
+  responseError(res, 413, 'Payload Too Large', 'Shorten your note!')
+}
+
+function errorInternalError (res): void {
+  responseError(res, 500, 'Internal Error', 'wtf.')
+}
+
+function errorServiceUnavailable (res): void {
+  responseError(res, 503, 'Service Unvavilable', 'I\'m busy right now, try again later.')
+}
+
+const errors = {
+  errorForbidden: errorForbidden,
+  errorNotFound: errorNotFound,
+  errorBadRequest: errorBadRequest,
+  errorTooLong: errorTooLong,
+  errorInternalError: errorInternalError,
+  errorServiceUnavailable: errorServiceUnavailable
+}
+
+export { errors }