Move old backend code to old_src folder

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

old_src/lib/web/auth/oauth2/oauth2-custom-strategy.ts

@@ -0,0 +1,84 @@
+import { InternalOAuthError, Strategy as OAuth2Strategy } from 'passport-oauth2'
+import { config } from '../../../config'
+import { PassportProfile, ProviderEnum } from '../utils'
+import { logger } from '../../../logger'
+
+function extractProfileAttribute (data, path: string): string {
+  // can handle stuff like `attrs[0].name`
+  const pathArray = path.split('.')
+  for (const segment of pathArray) {
+    const regex = /([\d\w]+)\[(.*)\]/
+    const m = regex.exec(segment)
+    data = m ? data[m[1]][m[2]] : data[segment]
+  }
+  return data
+}
+
+function parseProfile (data): Partial<PassportProfile> {
+  const username = extractProfileAttribute(data, config.oauth2.userProfileUsernameAttr)
+  let displayName: string | undefined
+  try {
+    // This may fail if the config.oauth2.userProfileDisplayNameAttr is undefined,
+    // or it is foo.bar and data["foo"] is undefined.
+    displayName = extractProfileAttribute(data, config.oauth2.userProfileDisplayNameAttr)
+  } catch (e) {
+    displayName = undefined
+    logger.debug('\'id_token[%s]\' is undefined. Setting \'displayName\' to \'undefined\'.\n%s', config.oauth2.userProfileDisplayNameAttr, e.message)
+  }
+
+  const emails: string[] = []
+  try {
+    const email = extractProfileAttribute(data, config.oauth2.userProfileEmailAttr)
+    if (email !== undefined) {
+      emails.push(email)
+    } else {
+      logger.debug('\'id_token[%s]\' is undefined. Setting \'emails\' to [].', config.oauth2.userProfileEmailAttr)
+    }
+  } catch (e) {
+    logger.debug('\'id_token[%s]\' is undefined. Setting \'emails\' to [].\n%s', config.oauth2.userProfileEmailAttr, e.message)
+  }
+
+  return {
+    id: username,
+    username: username,
+    displayName: displayName,
+    emails: emails
+  }
+}
+
+class OAuth2CustomStrategy extends OAuth2Strategy {
+  private readonly _userProfileURL: string;
+
+  constructor (options, verify) {
+    options.customHeaders = options.customHeaders || {}
+    super(options, verify)
+    this.name = 'oauth2'
+    this._userProfileURL = options.userProfileURL
+    this._oauth2.useAuthorizationHeaderforGET(true)
+  }
+
+  userProfile (accessToken, done): void {
+    this._oauth2.get(this._userProfileURL, accessToken, function (err, body, _) {
+      let json
+
+      if (err) {
+        return done(new InternalOAuthError('Failed to fetch user profile', err))
+      }
+
+      try {
+        if (body !== undefined) {
+          json = JSON.parse(body.toString())
+        }
+      } catch (ex) {
+        return done(new Error('Failed to parse user profile'))
+      }
+
+      const profile = parseProfile(json)
+      profile.provider = ProviderEnum.oauth2
+
+      done(null, profile)
+    })
+  }
+}
+
+export { OAuth2CustomStrategy }