chore(all): fix doc typos and apply basic lint recommendations

- Simplify comparisons
- Fix gramma or spelling on doc strings
- Fix doc string typos

Author: Michael Brewer

packages/logger/src/Logger.ts

@@ -5,11 +5,11 @@ import cloneDeep from 'lodash.clonedeep';
 import merge from 'lodash.merge';
 import { ConfigServiceInterface, EnvironmentVariablesService } from './config';
 import type {
+  ClassThatLogs,
   Environment,
   HandlerMethodDecorator,
   LambdaFunctionContext,
   LogAttributes,
-  ClassThatLogs,
   LoggerOptions,
   LogItemExtraInput,
   LogItemMessage,
@@ -90,7 +90,7 @@ class Logger implements ClassThatLogs {
   }
 
   public static evaluateColdStartOnce(): void {
-    if (Logger.getColdStartEvaluatedValue() === false) {
+    if (!Logger.getColdStartEvaluatedValue()) {
       Logger.evaluateColdStart();
     }
   }
@@ -117,9 +117,8 @@ class Logger implements ClassThatLogs {
 
       descriptor.value = (event, context, callback) => {
         this.addContext(context);
-        const result = originalMethod?.apply(this, [ event, context, callback ]);
 
-        return result;
+        return originalMethod?.apply(this, [ event, context, callback ]);
       };
     };
   }
@@ -181,7 +180,7 @@ class Logger implements ClassThatLogs {
     const coldStartValue = Logger.getColdStartValue();
     if (typeof coldStartValue === 'undefined') {
       Logger.setColdStartValue(true);
-    } else if (coldStartValue === true) {
+    } else if (coldStartValue) {
       Logger.setColdStartValue(false);
     } else {
       Logger.setColdStartValue(false);

packages/logger/src/log/LogItemInterface.ts

@@ -1,4 +1,4 @@
-import { LogAttributes } from '../types/Log';
+import { LogAttributes } from '../types';
 
 interface LogItemInterface {
 

packages/logger/src/types/formats/PowertoolLog.ts

@@ -37,7 +37,7 @@ type PowertoolLog = LogAttributes & {
   /**
    * message
    *
-   * Description: Log statement value. Unserializable JSON values will be casted to string.
+   * Description: Log statement value. Unserializable JSON values will be cast to string.
    * Example: "Collecting payment"
    */
   message?: string

packages/tracing/src/Tracer.ts

@@ -140,12 +140,12 @@ class Tracer implements TracerInterface {
     * @param error - Error to serialize as metadata
     */
   public addErrorAsMetadata(error: Error): void {
-    if (this.tracingEnabled === false) {
+    if (!this.tracingEnabled) {
       return;
     }
 
     const subsegment = this.getSegment();
-    if (this.captureError === false) {
+    if (!this.captureError) {
       subsegment.addErrorFlag();
 
       return;
@@ -163,7 +163,7 @@ class Tracer implements TracerInterface {
     * @param methodName - Name of the method that is being traced
     */
   public addResponseAsMetadata(data?: unknown, methodName?: string): void {
-    if (data === undefined || this.captureResponse === false || this.tracingEnabled === false) {
+    if (data === undefined || !this.captureResponse || !this.tracingEnabled) {
       return;
     }
 
@@ -175,7 +175,7 @@ class Tracer implements TracerInterface {
    * 
    */
   public addServiceNameAnnotation(): void {
-    if (this.tracingEnabled === false || this.serviceName === undefined) {
+    if (!this.tracingEnabled || this.serviceName === undefined) {
       return;
     }
     this.putAnnotation('Service', this.serviceName);
@@ -184,17 +184,17 @@ class Tracer implements TracerInterface {
   /**
    * Add ColdStart annotation to the current segment or subsegment.
    * 
-   * If Tracer has been initialized outside of the Lambda handler then the same instance
-   * of Tracer will be reused throghout the lifecycle of that same Lambda execution environment
+   * If Tracer has been initialized outside the Lambda handler then the same instance
+   * of Tracer will be reused throughout the lifecycle of that same Lambda execution environment
    * and this method will annotate `ColdStart: false` after the first invocation.
    * 
    * @see https://docs.aws.amazon.com/lambda/latest/dg/runtimes-context.html
    */
   public annotateColdStart(): void {
-    if (this.tracingEnabled === true) {
+    if (this.tracingEnabled) {
       this.putAnnotation('ColdStart', Tracer.coldStart);
     }
-    if (Tracer.coldStart === true) {
+    if (Tracer.coldStart) {
       Tracer.coldStart = false;
     }
   }
@@ -222,7 +222,7 @@ class Tracer implements TracerInterface {
    * @returns AWS - Instrumented AWS SDK
    */
   public captureAWS<T>(aws: T): T {
-    if (this.tracingEnabled === false) return aws;
+    if (!this.tracingEnabled) return aws;
 
     return this.provider.captureAWS(aws);
   }
@@ -251,7 +251,7 @@ class Tracer implements TracerInterface {
    * @returns service - Instrumented AWS SDK v2 client
    */
   public captureAWSClient<T>(service: T): T {
-    if (this.tracingEnabled === false) return service;
+    if (!this.tracingEnabled) return service;
 
     return this.provider.captureAWSClient(service);
   }
@@ -281,7 +281,7 @@ class Tracer implements TracerInterface {
    * @returns service - Instrumented AWS SDK v3 client
    */
   public captureAWSv3Client<T>(service: T): T {
-    if (this.tracingEnabled === false) return service;
+    if (!this.tracingEnabled) return service;
 
     return this.provider.captureAWSv3Client(service);
   }
@@ -322,7 +322,7 @@ class Tracer implements TracerInterface {
       const originalMethod = descriptor.value;
 
       descriptor.value = ((event, context, callback) => {
-        if (this.tracingEnabled === false) {
+        if (!this.tracingEnabled) {
           return originalMethod?.apply(target, [ event, context, callback ]);
         }
 
@@ -389,7 +389,7 @@ class Tracer implements TracerInterface {
       const originalMethod = descriptor.value;
 
       descriptor.value = (...args: unknown[]) => {
-        if (this.tracingEnabled === false) {
+        if (!this.tracingEnabled) {
           return originalMethod?.apply(target, [...args]);
         }
 
@@ -417,16 +417,16 @@ class Tracer implements TracerInterface {
   /**
    * Retrieve the current value of `ColdStart`.
    * 
-   * If Tracer has been initialized outside of the Lambda handler then the same instance
-   * of Tracer will be reused throghout the lifecycle of that same Lambda execution environment
+   * If Tracer has been initialized outside the Lambda handler then the same instance
+   * of Tracer will be reused throughout the lifecycle of that same Lambda execution environment
    * and this method will return `false` after the first invocation.
    * 
    * @see https://docs.aws.amazon.com/lambda/latest/dg/runtimes-context.html
    * 
    * @returns boolean - `true` if is cold start, otherwise `false`
    */
   public static getColdStart(): boolean {
-    if (Tracer.coldStart === true) {
+    if (Tracer.coldStart) {
       Tracer.coldStart = false;
 
       return true;
@@ -498,7 +498,7 @@ class Tracer implements TracerInterface {
    * @param value - Value for annotation
    */
   public putAnnotation(key: string, value: string | number | boolean): void {
-    if (this.tracingEnabled === false) return;
+    if (!this.tracingEnabled) return;
 
     const document = this.getSegment();
     if (document instanceof Segment) {
@@ -528,10 +528,10 @@ class Tracer implements TracerInterface {
    * 
    * @param key - Metadata key
    * @param value - Value for metadata
-   * @param timestamp - Namespace that metadata will lie under, if none is passed it will use the serviceName
+   * @param namespace - Namespace that metadata will lie under, if none is passed it will use the serviceName
    */
   public putMetadata(key: string, value: unknown, namespace?: string | undefined): void {
-    if (this.tracingEnabled === false) return;
+    if (!this.tracingEnabled) return;
 
     const document = this.getSegment();
     if (document instanceof Segment) {
@@ -608,7 +608,7 @@ class Tracer implements TracerInterface {
    * 
    * @param serviceName - Service name to validate
    */
-  private isValidServiceName(serviceName?: string): boolean {
+  private static isValidServiceName(serviceName?: string): boolean {
     return typeof serviceName === 'string' && serviceName.trim().length > 0;
   }
 
@@ -700,21 +700,21 @@ class Tracer implements TracerInterface {
    * @param serviceName - Name of the service to use
    */
   private setServiceName(serviceName?: string): void {
-    if (serviceName !== undefined && this.isValidServiceName(serviceName)) {
+    if (serviceName !== undefined && Tracer.isValidServiceName(serviceName)) {
       this.serviceName = serviceName;
 
       return;
     }
 
     const customConfigValue = this.getCustomConfigService()?.getServiceName();
-    if (customConfigValue !== undefined && this.isValidServiceName(customConfigValue)) {
+    if (customConfigValue !== undefined && Tracer.isValidServiceName(customConfigValue)) {
       this.serviceName = customConfigValue;
 
       return;
     }
 
     const envVarsValue = this.getEnvVarsService()?.getServiceName();
-    if (envVarsValue !== undefined && this.isValidServiceName(envVarsValue)) {
+    if (envVarsValue !== undefined && Tracer.isValidServiceName(envVarsValue)) {
       this.serviceName = envVarsValue;
 
       return;
@@ -728,7 +728,7 @@ class Tracer implements TracerInterface {
    * @param enabled - Whether or not tracing is enabled
    */
   private setTracingEnabled(enabled?: boolean): void {
-    if (enabled !== undefined && enabled === false) {
+    if (enabled !== undefined && !enabled) {
       this.tracingEnabled = enabled;
 
       return;
@@ -748,7 +748,7 @@ class Tracer implements TracerInterface {
       return;
     }
 
-    if (this.isLambdaSamCli() || this.isLambdaExecutionEnv() === false) {
+    if (this.isLambdaSamCli() || !this.isLambdaExecutionEnv()) {
       this.tracingEnabled = false;
     }
   }

packages/tracing/src/middleware/middy.ts

@@ -23,7 +23,7 @@ import { Segment, Subsegment } from 'aws-xray-sdk-core';
  * }).use(captureLambdaHandler(tracer));
  * ```
  * 
- * @param tracer - The Tracer instance to use for tracing
+ * @param target - The Tracer instance to use for tracing
  * @returns middleware object - The middy middleware object
  */
 const captureLambdaHandler = (target: Tracer): middy.MiddlewareObj => {