chore: expose transaction context propagation to the server sdk only (#590)

## This PR

- removes transaction context propagation from web SDK
- refactored the transaction context propagation logic to live under the
server SDK

### Notes

Transaction context propagation only makes sense on the server and was
simply ignored by the client. This removes the methods from the client
sdk to avoid confusion.

This is a **breaking change** in the web SDK. However, it's sub 1.0 and
this feature effectively had no effect if it was used. Currently, this
is not marked as a breaking change to avoid releasing a major version.
@toddbaert do you know if it's possible to mark the server sdk changes
as a chore and the web sdk changes as a breaking fix?

Signed-off-by: Michael Beemer <[email protected]>

---------

Signed-off-by: Michael Beemer <[email protected]>

Author: beeme1mr

Diff for: packages/server/src/index.ts

@@ -2,4 +2,5 @@ export * from './client';
 export * from './provider';
 export * from './evaluation';
 export * from './open-feature';
+export * from './transaction-context';
 export * from '@openfeature/shared';

Diff for: packages/server/src/open-feature.ts

@@ -6,6 +6,12 @@ import {
   objectOrUndefined,
   stringOrUndefined,
 } from '@openfeature/shared';
+import {
+  ManageTransactionContextPropagator,
+  NOOP_TRANSACTION_CONTEXT_PROPAGATOR,
+  TransactionContext,
+  TransactionContextPropagator,
+} from './transaction-context';
 import { Client, OpenFeatureClient } from './client';
 
 // use a symbol as a key for the global singleton
@@ -16,7 +22,11 @@ type OpenFeatureGlobal = {
 };
 const _globalThis = globalThis as OpenFeatureGlobal;
 
-export class OpenFeatureAPI extends OpenFeatureCommonAPI<Provider> implements ManageContext<OpenFeatureAPI> {
+export class OpenFeatureAPI
+  extends OpenFeatureCommonAPI<Provider>
+  implements ManageContext<OpenFeatureAPI>, ManageTransactionContextPropagator<OpenFeatureCommonAPI<Provider>>
+{
+  private _transactionContextPropagator: TransactionContextPropagator = NOOP_TRANSACTION_CONTEXT_PROPAGATOR;
   protected _defaultProvider: Provider = NOOP_PROVIDER;
 
   private constructor() {
@@ -111,6 +121,39 @@ export class OpenFeatureAPI extends OpenFeatureCommonAPI<Provider> implements Ma
   clearProviders(): Promise<void> {
     return super.clearProvidersAndSetDefault(NOOP_PROVIDER);
   }
+
+  setTransactionContextPropagator(
+    transactionContextPropagator: TransactionContextPropagator
+  ): OpenFeatureCommonAPI<Provider> {
+    const baseMessage = 'Invalid TransactionContextPropagator, will not be set: ';
+    if (typeof transactionContextPropagator?.getTransactionContext !== 'function') {
+      this._logger.error(`${baseMessage}: getTransactionContext is not a function.`);
+    } else if (typeof transactionContextPropagator?.setTransactionContext !== 'function') {
+      this._logger.error(`${baseMessage}: setTransactionContext is not a function.`);
+    } else {
+      this._transactionContextPropagator = transactionContextPropagator;
+    }
+    return this;
+  }
+
+  setTransactionContext<R>(
+    transactionContext: TransactionContext,
+    callback: (...args: unknown[]) => R,
+    ...args: unknown[]
+  ): void {
+    this._transactionContextPropagator.setTransactionContext(transactionContext, callback, ...args);
+  }
+
+  getTransactionContext(): TransactionContext {
+    try {
+      return this._transactionContextPropagator.getTransactionContext();
+    } catch (err: unknown) {
+      const error = err as Error | undefined;
+      this._logger.error(`Error getting transaction context: ${error?.message}, returning empty context.`);
+      this._logger.error(error?.stack);
+      return {};
+    }
+  }
 }
 
 /**

Diff for: packages/shared/src/transaction-context/index.ts renamed to packages/server/src/transaction-context/index.ts

@@ -1,4 +1,4 @@
-import { EvaluationContext } from '../evaluation';
+import { EvaluationContext } from '@openfeature/shared';
 import { TransactionContextPropagator } from './transaction-context';
 
 class NoopTransactionContextPropagator implements TransactionContextPropagator {

Diff for: packages/shared/src/transaction-context/no-op-transaction-context-propagator.ts renamed to packages/server/src/transaction-context/no-op-transaction-context-propagator.ts

@@ -1,4 +1,4 @@
-import { EvaluationContext } from '../evaluation';
+import { EvaluationContext } from '@openfeature/shared';
 
 /**
  * Transaction context is a mechanism for adding transaction specific context that

Diff for: packages/shared/src/transaction-context/transaction-context.ts renamed to packages/server/src/transaction-context/transaction-context.ts

@@ -6,6 +6,5 @@ export * from './events';
 export * from './logger';
 export * from './provider';
 export * from './evaluation';
-export * from './transaction-context';
 export * from './type-guards';
 export * from './open-feature';

Diff for: packages/shared/src/index.ts

@@ -6,24 +6,13 @@ import { isDefined } from './filter';
 import { EvaluationLifeCycle, Hook } from './hooks';
 import { DefaultLogger, Logger, ManageLogger, SafeLogger } from './logger';
 import { CommonProvider, ProviderMetadata, ProviderStatus } from './provider';
-import {
-  ManageTransactionContextPropagator,
-  NOOP_TRANSACTION_CONTEXT_PROPAGATOR,
-  TransactionContext,
-  TransactionContextPropagator,
-} from './transaction-context';
 import { objectOrUndefined, stringOrUndefined } from './type-guards';
 import { Paradigm } from './types';
 
 export abstract class OpenFeatureCommonAPI<P extends CommonProvider = CommonProvider>
-  implements
-    Eventing,
-    EvaluationLifeCycle<OpenFeatureCommonAPI<P>>,
-    ManageLogger<OpenFeatureCommonAPI<P>>,
-    ManageTransactionContextPropagator<OpenFeatureCommonAPI<P>>
+  implements Eventing, EvaluationLifeCycle<OpenFeatureCommonAPI<P>>, ManageLogger<OpenFeatureCommonAPI<P>>
 {
   protected _hooks: Hook[] = [];
-  protected _transactionContextPropagator: TransactionContextPropagator = NOOP_TRANSACTION_CONTEXT_PROPAGATOR;
   protected _context: EvaluationContext = {};
   protected _logger: Logger = new DefaultLogger();
 
@@ -350,35 +339,4 @@ export abstract class OpenFeatureCommonAPI<P extends CommonProvider = CommonProv
     this._logger.error(`Error during shutdown of provider ${provider.metadata.name}: ${err}`);
     this._logger.error((err as Error)?.stack);
   }
-
-  setTransactionContextPropagator(transactionContextPropagator: TransactionContextPropagator): OpenFeatureCommonAPI<P> {
-    const baseMessage = 'Invalid TransactionContextPropagator, will not be set: ';
-    if (typeof transactionContextPropagator?.getTransactionContext !== 'function') {
-      this._logger.error(`${baseMessage}: getTransactionContext is not a function.`);
-    } else if (typeof transactionContextPropagator?.setTransactionContext !== 'function') {
-      this._logger.error(`${baseMessage}: setTransactionContext is not a function.`);
-    } else {
-      this._transactionContextPropagator = transactionContextPropagator;
-    }
-    return this;
-  }
-
-  setTransactionContext<R>(
-    transactionContext: TransactionContext,
-    callback: (...args: unknown[]) => R,
-    ...args: unknown[]
-  ): void {
-    this._transactionContextPropagator.setTransactionContext(transactionContext, callback, ...args);
-  }
-
-  getTransactionContext(): TransactionContext {
-    try {
-      return this._transactionContextPropagator.getTransactionContext();
-    } catch (err: unknown) {
-      const error = err as Error | undefined;
-      this._logger.error(`Error getting transaction context: ${error?.message}, returning empty context.`);
-      this._logger.error(error?.stack);
-      return {};
-    }
-  }
 }

Diff for: packages/shared/src/open-feature.ts

@@ -98,7 +98,9 @@
   },
   "include": [
     "./src/**/*"
-  ],
+,
+"../server/src/transaction-context"
+],
   "exclude": [
     "node_modules",
     "**/*.test.js"