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import { GitLabVersionDetector, GitLabInstanceInfo } from "./GitLabVersionDetector";
import { SchemaIntrospector, SchemaInfo } from "./SchemaIntrospector";
import { GITLAB_BASE_URL, GITLAB_TOKEN } from "../config";
import { isOAuthEnabled } from "../oauth/index";
import { logger } from "../logger";
interface CacheEntry {
schemaInfo: SchemaInfo;
instanceInfo: GitLabInstanceInfo;
timestamp: number;
}
export class ConnectionManager {
private static instance: ConnectionManager | null = null;
private client: GraphQLClient | null = null;
private versionDetector: GitLabVersionDetector | null = null;
private schemaIntrospector: SchemaIntrospector | null = null;
private instanceInfo: GitLabInstanceInfo | null = null;
private schemaInfo: SchemaInfo | null = null;
private isInitialized: boolean = false;
private static introspectionCache = new Map<string, CacheEntry>();
private static readonly CACHE_TTL = 10 * 60 * 1000; // 10 minutes in milliseconds
private constructor() {}
public static getInstance(): ConnectionManager {
ConnectionManager.instance ??= new ConnectionManager();
return ConnectionManager.instance;
}
public async initialize(): Promise<void> {
if (this.isInitialized) {
return;
}
try {
const oauthMode = isOAuthEnabled();
// In OAuth mode, token comes from request context via enhancedFetch
// In static mode, require both base URL and token
if (!GITLAB_BASE_URL) {
throw new Error("GitLab base URL is required");
}
if (!oauthMode && !GITLAB_TOKEN) {
throw new Error("GitLab token is required in static authentication mode");
}
// Construct GraphQL endpoint from base URL
const endpoint = `${GITLAB_BASE_URL}/api/graphql`;
// In OAuth mode, don't set static Authorization header
// enhancedFetch will add the token from request context
const clientOptions = oauthMode
? {}
: { headers: { Authorization: `Bearer ${GITLAB_TOKEN}` } };
this.client = new GraphQLClient(endpoint, clientOptions);
this.versionDetector = new GitLabVersionDetector(this.client);
this.schemaIntrospector = new SchemaIntrospector(this.client);
// In OAuth mode, try unauthenticated version detection first
// Many GitLab instances expose /api/v4/version without auth
Iif (oauthMode) {
logger.info("OAuth mode: attempting unauthenticated version detection");
try {
const versionResponse = await fetch(`${GITLAB_BASE_URL}/api/v4/version`);
if (versionResponse.ok) {
const versionData = (await versionResponse.json()) as {
version: string;
enterprise?: boolean;
};
logger.info(
{ version: versionData.version },
"Detected GitLab version without authentication"
);
// Create basic instance info from unauthenticated response
// Default to "premium" tier for enterprise instances - will be refined on first authenticated request
this.instanceInfo = {
version: versionData.version,
tier: versionData.enterprise ? "premium" : "free",
features: this.getDefaultFeatures(versionData.enterprise ?? false),
detectedAt: new Date(),
};
// Schema introspection still deferred (requires auth for full introspection)
logger.info(
"OAuth mode: version detected, full introspection deferred until first authenticated request"
);
} else {
logger.info(
{ status: versionResponse.status },
"OAuth mode: unauthenticated version detection failed, deferring all introspection"
);
}
} catch (error) {
logger.info(
{ error: error instanceof Error ? error.message : String(error) },
"OAuth mode: unauthenticated version detection failed, deferring all introspection"
);
}
this.isInitialized = true;
return;
}
// Check cache first
const cached = ConnectionManager.introspectionCache.get(endpoint);
const now = Date.now();
if (cached && now - cached.timestamp < ConnectionManager.CACHE_TTL) {
logger.info("Using cached GraphQL introspection data");
this.instanceInfo = cached.instanceInfo;
this.schemaInfo = cached.schemaInfo;
} else {
logger.debug("Introspecting GitLab GraphQL schema...");
// Detect instance info and introspect schema in parallel
const [instanceInfo, schemaInfo] = await Promise.all([
this.versionDetector.detectInstance(),
this.schemaIntrospector.introspectSchema(),
]);
this.instanceInfo = instanceInfo;
this.schemaInfo = schemaInfo;
// Cache the results
ConnectionManager.introspectionCache.set(endpoint, {
instanceInfo,
schemaInfo,
timestamp: now,
});
logger.info("GraphQL schema introspection completed");
}
this.isInitialized = true;
logger.info(
{
version: this.instanceInfo?.version,
tier: this.instanceInfo?.tier,
features: this.instanceInfo
? Object.entries(this.instanceInfo.features)
.filter(([, enabled]) => enabled)
.map(([feature]) => feature)
: [],
widgetTypes: this.schemaInfo?.workItemWidgetTypes.length || 0,
schemaTypes: this.schemaInfo?.typeDefinitions.size || 0,
},
"GitLab instance and schema detected"
);
} catch (error) {
logger.error({ err: error as Error }, "Failed to initialize connection");
throw error;
}
}
/**
* Ensure schema introspection has been performed.
* In OAuth mode, this should be called within a token context.
*/
public async ensureIntrospected(): Promise<void> {
// Already introspected
if (this.instanceInfo && this.schemaInfo) {
return;
}
if (!this.client || !this.versionDetector || !this.schemaIntrospector) {
throw new Error("Connection not initialized. Call initialize() first.");
}
const endpoint = this.client.endpoint;
// Check cache first
const cached = ConnectionManager.introspectionCache.get(endpoint);
const now = Date.now();
if (cached && now - cached.timestamp < ConnectionManager.CACHE_TTL) {
logger.info("Using cached GraphQL introspection data");
this.instanceInfo = cached.instanceInfo;
this.schemaInfo = cached.schemaInfo;
return;
}
logger.debug("Introspecting GitLab GraphQL schema (deferred OAuth mode)...");
// Detect instance info and introspect schema in parallel
const [instanceInfo, schemaInfo] = await Promise.all([
this.versionDetector.detectInstance(),
this.schemaIntrospector.introspectSchema(),
]);
this.instanceInfo = instanceInfo;
this.schemaInfo = schemaInfo;
// Cache the results
ConnectionManager.introspectionCache.set(endpoint, {
instanceInfo,
schemaInfo,
timestamp: now,
});
logger.info(
{
version: this.instanceInfo?.version,
tier: this.instanceInfo?.tier,
widgetTypes: this.schemaInfo?.workItemWidgetTypes.length || 0,
},
"GraphQL schema introspection completed (deferred)"
);
}
public getClient(): GraphQLClient {
if (!this.client) {
throw new Error("Connection not initialized. Call initialize() first.");
}
return this.client;
}
public getVersionDetector(): GitLabVersionDetector {
if (!this.versionDetector) {
throw new Error("Connection not initialized. Call initialize() first.");
}
return this.versionDetector;
}
public getSchemaIntrospector(): SchemaIntrospector {
if (!this.schemaIntrospector) {
throw new Error("Connection not initialized. Call initialize() first.");
}
return this.schemaIntrospector;
}
public getInstanceInfo(): GitLabInstanceInfo {
if (!this.instanceInfo) {
throw new Error("Connection not initialized. Call initialize() first.");
}
return this.instanceInfo;
}
public getSchemaInfo(): SchemaInfo {
if (!this.schemaInfo) {
throw new Error("Connection not initialized. Call initialize() first.");
}
return this.schemaInfo;
}
public isFeatureAvailable(feature: keyof GitLabInstanceInfo["features"]): boolean {
if (!this.instanceInfo) {
return false;
}
return this.instanceInfo.features[feature];
}
public getTier(): string {
if (!this.instanceInfo) {
return "unknown";
}
return this.instanceInfo.tier;
}
public getVersion(): string {
if (!this.instanceInfo) {
return "unknown";
}
return this.instanceInfo.version;
}
public isWidgetAvailable(widgetType: string): boolean {
if (!this.schemaIntrospector) {
return false;
}
return this.schemaIntrospector.isWidgetTypeAvailable(widgetType);
}
/**
* Get default features based on whether GitLab is enterprise edition.
* In OAuth mode without full introspection, we default to enabling most features
* to allow tools to be available - they will fail gracefully if not actually available.
*/
private getDefaultFeatures(isEnterprise: boolean): GitLabInstanceInfo["features"] {
// Default to enabling most features - better to allow and fail gracefully
// than to block tools that might actually be available
return {
workItems: true,
epics: isEnterprise,
iterations: isEnterprise,
roadmaps: isEnterprise,
portfolioManagement: isEnterprise,
advancedSearch: true,
codeReview: true,
securityDashboard: isEnterprise,
complianceFramework: isEnterprise,
valueStreamAnalytics: isEnterprise,
customFields: isEnterprise,
okrs: isEnterprise,
healthStatus: isEnterprise,
weight: isEnterprise,
multiLevelEpics: isEnterprise,
serviceDesk: true,
requirements: isEnterprise,
qualityManagement: isEnterprise,
timeTracking: true,
crmContacts: true,
vulnerabilities: isEnterprise,
errorTracking: true,
designManagement: true,
linkedResources: true,
emailParticipants: true,
};
}
public reset(): void {
this.client = null;
this.versionDetector = null;
this.schemaIntrospector = null;
this.instanceInfo = null;
this.schemaInfo = null;
this.isInitialized = false;
}
}
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