get-issue.handler.ts•3.69 kB
/**
* Get Issue Handler
*
* MCP tool handler for retrieving JIRA issue details
*/
import { BaseToolHandler } from "@core/tools/tool-handler.class";
import {
JiraApiError,
JiraNotFoundError,
JiraPermissionError,
} from "@features/jira/client/errors";
import { IssueFormatter } from "@features/jira/issues/formatters/issue.formatter";
import type { GetIssueUseCase } from "@features/jira/issues/use-cases";
import type {
GetIssueParams,
IssueParamsValidator,
} from "@features/jira/issues/validators";
/**
* Handler for retrieving and formatting JIRA issue details
*/
export class GetIssueHandler extends BaseToolHandler<GetIssueParams, string> {
private formatter: IssueFormatter;
/**
* Create a new GetIssueHandler with use case and validator
*
* @param getIssueUseCase - Use case for retrieving issue details
* @param issueParamsValidator - Validator for issue parameters
*/
constructor(
private readonly getIssueUseCase: GetIssueUseCase,
private readonly issueParamsValidator: IssueParamsValidator,
) {
super("JIRA", "Get Issue");
this.formatter = new IssueFormatter();
}
/**
* Execute the handler logic
* Retrieves issue details and formats them using the formatter
*
* @param params - Parameters for issue retrieval
*/
protected async execute(params: GetIssueParams): Promise<string> {
try {
// Step 1: Validate parameters
const validatedParams =
this.issueParamsValidator.validateGetIssueParams(params);
this.logger.info(`Getting JIRA issue: ${validatedParams.issueKey}`);
// Step 2: Get issue using use case
const issue = await this.getIssueUseCase.execute(validatedParams);
// Step 3: Format issue using the formatter
return this.formatter.format(issue);
} catch (error) {
this.logger.error(`Failed to get issue: ${error}`);
throw this.enhanceError(error, params);
}
}
/**
* Enhance error messages for better user guidance
*/
private enhanceError(error: unknown, params?: GetIssueParams): Error {
const issueContext = params?.issueKey
? ` for issue ${params.issueKey}`
: "";
if (error instanceof JiraNotFoundError) {
return new Error(
`❌ **Issue Not Found**\n\nNo issue found${issueContext}.\n\n**Solutions:**\n- Verify the issue key is correct\n- Check if the issue exists\n- Verify you have permission to view the issue\n\n**Example:** \`jira_get_issue issueKey="PROJ-123"\``,
);
}
if (error instanceof JiraPermissionError) {
return new Error(
`❌ **Permission Denied**\n\nYou don't have permission to view the issue${issueContext}.\n\n**Solutions:**\n- Check your JIRA permissions\n- Contact your JIRA administrator\n- Verify you have access to the project\n\n**Required Permissions:** Browse Projects`,
);
}
if (error instanceof JiraApiError) {
return new Error(
`❌ **JIRA API Error**\n\n${error.message}\n\n**Solutions:**\n- Verify the issue key is valid (format: PROJ-123)\n- Check your JIRA connection\n- Try with a different issue\n\n**Example:** \`jira_get_issue issueKey="PROJ-123"\``,
);
}
if (error instanceof Error) {
return new Error(
`❌ **Issue Retrieval Failed**\n\n${error.message}${issueContext}\n\n**Solutions:**\n- Check your parameters are valid\n- Verify your JIRA connection\n- Try with a different issue\n\n**Example:** \`jira_get_issue issueKey="PROJ-123"\``,
);
}
return new Error(
`❌ **Unknown Error**\n\nAn unknown error occurred during issue retrieval${issueContext}.\n\nPlease check your parameters and try again.`,
);
}
}