feat(authorization): add bearer token authorization

src/lib/Configuration.ts

@@ -6,6 +6,10 @@ import { Logger } from '../c8/lib/C8Logger'
 
 const getMainEnv = () =>
 	createEnv({
+		BEARER_TOKEN: {
+			type: 'string',
+			optional: true,
+		},
 		/** Custom user agent  */
 		CAMUNDA_CUSTOM_USER_AGENT_STRING: {
 			type: 'string',
@@ -367,8 +371,9 @@ const getEnv = () => ({
 
 // Helper type for enforcing array contents to match an object's keys
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-type EnforceArrayContent<T, K extends keyof any> =
-	T extends Array<K> ? T : never
+type EnforceArrayContent<T, K extends keyof any> = T extends Array<K>
+	? T
+	: never
 
 // Function to create a complete keys array, enforcing completeness at compile time
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -383,6 +388,7 @@ type CamundaEnvironmentVariables = ReturnType<typeof getMainEnv> &
 export type CamundaEnvironmentVariable = keyof CamundaEnvironmentVariables
 export const CamundaEnvironmentVariableDictionary =
 	createCompleteKeysArray<CamundaEnvironmentVariable>([
+		'BEARER_TOKEN',
 		'CAMUNDA_CONSOLE_BASE_URL',
 		'CAMUNDA_CONSOLE_CLIENT_ID',
 		'CAMUNDA_CONSOLE_CLIENT_SECRET',

src/lib/ConstructOAuthProvider.ts

@@ -2,6 +2,7 @@ import debug from 'debug'
 
 import { NullAuthProvider, OAuthProvider } from '../oauth'
 import { BasicAuthProvider } from '../oauth/lib/BasicAuthProvider'
+import { BearerAuthProvider } from '../oauth/lib/BearerAuthProvider'
 
 import { CamundaPlatform8Configuration } from './Configuration'
 
@@ -20,6 +21,9 @@ export function constructOAuthProvider(config: CamundaPlatform8Configuration) {
 		if (config.CAMUNDA_AUTH_STRATEGY === 'BASIC') {
 			trace(`Using Basic Auth`)
 			return new BasicAuthProvider({ config })
+		} else if (config.CAMUNDA_AUTH_STRATEGY === 'BEARER') {
+			trace(`Using Bearer Token`)
+			return new BearerAuthProvider({ config })
 		} else {
 			trace(`Using OAuth`)
 			return new OAuthProvider({ config })

src/oauth/lib/BearerAuthProvider.ts

@@ -0,0 +1,30 @@
+import { debug } from 'debug'
+
+import {
+	CamundaEnvironmentConfigurator,
+	CamundaPlatform8Configuration,
+	DeepPartial,
+} from '../../lib'
+import { IOAuthProvider } from '../index'
+
+import { TokenGrantAudienceType } from './IOAuthProvider'
+
+export class BearerAuthProvider implements IOAuthProvider {
+	private bearerToken: string
+
+	constructor(options?: {
+		config?: DeepPartial<CamundaPlatform8Configuration>
+	}) {
+		const config = CamundaEnvironmentConfigurator.mergeConfigWithEnvironment(
+			options?.config ?? {}
+		)
+
+		this.bearerToken = config.BEARER_TOKEN || ''
+	}
+
+	public async getToken(audienceType: TokenGrantAudienceType): Promise<string> {
+		debug(`Token request for ${audienceType}`)
+
+		return Promise.resolve(this.bearerToken)
+	}
+}