Allow job-summary only on failure

Instead of a binary true/false option, it is now possible to only add
a Job Summary when the build failed. This applies both to the overall
Job Summary added to the workflow run, and to the new PR comment feature.

src/input-params.ts

@@ -71,12 +71,25 @@ export function isJobSummaryEnabled(): boolean {
     return getBooleanInput('generate-job-summary', true)
 }
 
-export function isPRCommentEnabled(): boolean {
-    return getBooleanInput('add-pr-comment', false)
+export function getJobSummaryOption(): JobSummaryOption {
+    return parseJobSummaryOption('add-job-summary')
 }
 
-export function isDependencyGraphEnabled(): boolean {
-    return getBooleanInput('generate-dependency-graph', true)
+export function getPRCommentOption(): JobSummaryOption {
+    return parseJobSummaryOption('add-job-summary-as-pr-comment')
+}
+
+function parseJobSummaryOption(paramName: string): JobSummaryOption {
+    const val = core.getInput(paramName)
+    switch (val.toLowerCase().trim()) {
+        case 'never':
+            return JobSummaryOption.Never
+        case 'always':
+            return JobSummaryOption.Always
+        case 'on-failure':
+            return JobSummaryOption.OnFailure
+    }
+    throw TypeError(`The value '${val}' is not valid for ${paramName}. Valid values are: [never, always, on-failure].`)
 }
 
 export function getDependencyGraphOption(): DependencyGraphOption {
@@ -94,7 +107,7 @@ export function getDependencyGraphOption(): DependencyGraphOption {
             return DependencyGraphOption.DownloadAndSubmit
     }
     throw TypeError(
-        `The value '${val} is not valid for 'dependency-graph. Valid values are: [disabled, generate, generate-and-submit, generate-and-upload, download-and-submit]. The default value is 'disabled'.`
+        `The value '${val}' is not valid for 'dependency-graph'. Valid values are: [disabled, generate, generate-and-submit, generate-and-upload, download-and-submit]. The default value is 'disabled'.`
     )
 }
 
@@ -135,3 +148,9 @@ export enum DependencyGraphOption {
     GenerateAndUpload = 'generate-and-upload',
     DownloadAndSubmit = 'download-and-submit'
 }
+
+export enum JobSummaryOption {
+    Never = 'never',
+    Always = 'always',
+    OnFailure = 'on-failure'
+}