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/**
* Intelligent type mapping between different work item taxonomies
* Based on the mapping rules defined in PROVIDERS.md
*/
export interface UnifiedLabels {
has(label: string): boolean;
all: string[];
}
export interface GitLabTypeHints {
glType?: 'epic' | 'issue' | 'task' | 'incident' | 'bug' | 'test_case';
isGroupEpic?: boolean;
childCount?: number;
}
export interface GitHubTypeHints {
ghType?: 'bug' | 'enhancement' | 'task' | 'epic';
labels: UnifiedLabels;
childCount?: number;
}
export interface MappingInput {
provider: Provider;
process?: AzureProcess; // For Azure DevOps
title: string;
description?: string;
gitlab?: GitLabTypeHints;
github?: GitHubTypeHints;
}
export interface MappingResult {
targetType: string; // Platform-specific type
addTags: string[];
rationale: string[];
}
export class TypeMapper {
private constructor() {
// Utility class - prevent instantiation
}
/**
* GitLab → Azure DevOps type mapping
*/
private static gitlabToAzureTypeMap = {
agile: {
epic: 'Epic',
issue: 'User Story',
task: 'Task',
incident: 'Bug',
bug: 'Bug',
test_case: 'Test Case',
},
scrum: {
epic: 'Epic',
issue: 'Product Backlog Item',
task: 'Task',
incident: 'Bug',
bug: 'Bug',
test_case: 'Test Case',
},
basic: {
epic: 'Epic',
issue: 'Issue',
task: 'Task',
incident: 'Issue', // + tag: incident
bug: 'Issue', // + tag: bug
test_case: 'Task', // + tag: test-case
},
};
/**
* GitHub → Azure DevOps type mapping with detection logic
*/
private static detectGitHubType(labels: string[], body?: string, childCount = 0): string {
const labelSet = new Set(labels.map((l) => l.toLowerCase()));
if (labelSet.has('epic')) return 'epic';
if (labelSet.has('bug')) return 'bug';
if (labelSet.has('task')) return 'task';
if (labelSet.has('enhancement')) return 'enhancement';
// Check for parent-child pattern (epic simulation)
Iif (body?.includes('- [ ]') && childCount > 3) return 'epic';
return 'issue';
}
private static mapGitHubToAzure(
detectedType: string,
process: AzureProcess,
childCount = 0,
): string {
switch (detectedType) {
case 'epic':
return 'Epic';
case 'bug':
return process === 'basic' ? 'Issue' : 'Bug';
case 'task':
return 'Task';
case 'enhancement':
return childCount >= 2
? 'Feature'
: process === 'scrum'
? 'Product Backlog Item'
: process === 'basic'
? 'Issue'
: 'User Story';
default:
return process === 'scrum'
? 'Product Backlog Item'
: process === 'basic'
? 'Issue'
: 'User Story';
}
}
/**
* Azure DevOps → GitLab type mapping
*/
private static azureToGitlabTypeMap: Record<string, string> = {
Epic: 'epic',
Feature: 'issue',
'User Story': 'issue',
'Product Backlog Item': 'issue',
Issue: 'issue',
Task: 'task',
Bug: 'incident',
'Test Case': 'test_case',
};
/**
* Azure DevOps → GitHub type mapping
*/
private static azureToGitHubTypeMap: Record<string, string[]> = {
Epic: ['epic'],
Feature: ['enhancement', 'feature'],
'User Story': ['story'],
'Product Backlog Item': ['story'],
Issue: [], // No specific label
Task: ['task'],
Bug: ['bug'],
'Test Case': ['test'],
};
/**
* GitLab → GitHub type mapping
*/
private static gitlabToGitHubTypeMap: Record<string, string[]> = {
epic: ['epic'],
issue: [],
task: ['task'],
incident: ['bug', 'incident'],
bug: ['bug'],
test_case: ['test'],
};
/**
* Main type mapping function
*/
static mapType(input: MappingInput): MappingResult {
const { provider, process = 'agile' } = input;
const rationale: string[] = [];
const addTags: string[] = [];
if (provider === 'gitlab' && input.gitlab) {
return this.mapGitLabType(input.gitlab, process, rationale, addTags);
} else if (provider === 'github' && input.github) {
return this.mapGitHubType(input.github, process, rationale, addTags);
}
// Default fallback
rationale.push('Unknown provider or missing type hints; using default mapping');
return {
targetType: 'Issue',
addTags,
rationale,
};
}
private static mapGitLabType(
gitlab: GitLabTypeHints,
process: AzureProcess,
rationale: string[],
addTags: string[],
): MappingResult {
const glType = gitlab.glType ?? 'issue';
// Handle group-level epics
if (glType === 'epic' || gitlab.isGroupEpic) {
rationale.push('GitLab type is epic (group-level)');
return { targetType: 'Epic', addTags, rationale };
}
// Handle incidents with special tagging for Basic process
if (glType === 'incident') {
rationale.push('GitLab type is incident → map to Bug; preserve tag `incident`');
if (process === 'basic') {
addTags.push('incident');
return { targetType: 'Issue', addTags, rationale };
}
return { targetType: 'Bug', addTags, rationale };
}
// Handle test cases
if (glType === 'test_case') {
rationale.push('GitLab type is test_case');
if (process === 'basic') {
addTags.push('test-case');
return { targetType: 'Task', addTags, rationale };
}
return { targetType: 'Test Case', addTags, rationale };
}
// Standard mapping
const mapped = this.gitlabToAzureTypeMap[process][glType] || 'Issue';
rationale.push(`GitLab ${glType} → Azure ${mapped} (${process} process)`);
return { targetType: mapped, addTags, rationale };
}
private static mapGitHubType(
github: GitHubTypeHints,
process: AzureProcess,
rationale: string[],
addTags: string[],
): MappingResult {
const labels = github.labels.all;
const detectedType = this.detectGitHubType(labels, '', github.childCount);
rationale.push(`Detected GitHub type: ${detectedType} from labels: [${labels.join(', ')}]`);
// Handle enhancement with child count heuristic
if (detectedType === 'enhancement' && (github.childCount ?? 0) >= 2) {
rationale.push(`Enhancement with ${github.childCount} children → Feature`);
return { targetType: 'Feature', addTags, rationale };
}
const mapped = this.mapGitHubToAzure(detectedType, process, github.childCount);
rationale.push(`GitHub ${detectedType} → Azure ${mapped} (${process} process)`);
// Preserve enhancement label
if (detectedType === 'enhancement' && mapped !== 'Feature') {
addTags.push('enhancement');
}
return { targetType: mapped, addTags, rationale };
}
/**
* Reverse mapping: Azure → GitLab
*/
static mapAzureToGitLab(azureType: string): { type: string; tags: string[] } {
const type = this.azureToGitlabTypeMap[azureType] || 'issue';
const tags: string[] = [];
// Preserve original type information
if (azureType !== 'Issue') {
tags.push(`azure-${azureType.toLowerCase().replace(' ', '-')}`);
}
return { type, tags };
}
/**
* Reverse mapping: Azure → GitHub
*/
static mapAzureToGitHub(azureType: string): string[] {
return this.azureToGitHubTypeMap[azureType] ?? [];
}
/**
* Reverse mapping: GitLab → GitHub
*/
static mapGitLabToGitHub(gitlabType: string): string[] {
return this.gitlabToGitHubTypeMap[gitlabType] ?? [];
}
/**
* Normalize type to common WorkItemType
*/
static normalizeType(type: string): WorkItemType {
const typeMap: Partial<Record<string, WorkItemType>> = {
// Common types
epic: 'epic',
task: 'task',
bug: 'bug',
issue: 'issue',
story: 'story',
feature: 'feature',
// GitLab specific
incident: 'bug',
test_case: 'test',
// GitHub specific
enhancement: 'story',
// Azure DevOps specific
'user story': 'story',
'product backlog item': 'story',
'test case': 'test',
};
const normalized = typeMap[type.toLowerCase()];
return normalized ?? 'issue';
}
}
/**
* Helper to create UnifiedLabels from string array
*/
export function createUnifiedLabels(labels: string[]): UnifiedLabels {
const labelSet = new Set(labels.map((l) => l.toLowerCase()));
return {
has: (label: string) => labelSet.has(label.toLowerCase()),
all: labels,
};
}
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