fix(stalker): preserve explicit portal identity (#941)

libs/shared/interfaces/src/index.ts

@@ -43,6 +43,7 @@ export * from './lib/xtream-vod-stream.interface';
 
 // Stalker interfaces
 export * from './lib/stalker-item.normalizer';
+export * from './lib/stalker-identity.utils';
 export * from './lib/stalker-portal-item.interface';
 export * from './lib/stalker-serial-details.interface';
 export * from './lib/stalker-vod-details.interface';

libs/shared/interfaces/src/lib/stalker-identity.utils.ts

@@ -0,0 +1,58 @@
+export const LEGACY_DEFAULT_STALKER_SERIAL = 'BEDACD4569BAF';
+const STALKER_CFDUID_LENGTH = 32;
+const STALKER_SERIAL_CFDUID_SUFFIX = 'e030245495acd6ebfc1';
+
+export interface StalkerPortalIdentity {
+    serialNumber?: string;
+    deviceId1?: string;
+    deviceId2?: string;
+    signature1?: string;
+    signature2?: string;
+}
+
+export function normalizeStalkerIdentityValue(
+    value: string | undefined | null
+): string | undefined {
+    const trimmed = value?.trim();
+    return trimmed ? trimmed : undefined;
+}
+
+export function normalizeStalkerSerialNumber(
+    serialNumber: string | undefined | null
+): string | undefined {
+    const trimmed = normalizeStalkerIdentityValue(serialNumber);
+    if (
+        !trimmed ||
+        trimmed.toUpperCase() === LEGACY_DEFAULT_STALKER_SERIAL
+    ) {
+        return undefined;
+    }
+
+    return trimmed;
+}
+
+export function normalizeStalkerPortalIdentity(
+    identity: StalkerPortalIdentity | undefined | null
+): StalkerPortalIdentity {
+    const serialNumber = normalizeStalkerSerialNumber(identity?.serialNumber);
+    const deviceId1 = normalizeStalkerIdentityValue(identity?.deviceId1);
+    const deviceId2 = normalizeStalkerIdentityValue(identity?.deviceId2);
+    const signature1 = normalizeStalkerIdentityValue(identity?.signature1);
+    const signature2 = normalizeStalkerIdentityValue(identity?.signature2);
+
+    return {
+        ...(serialNumber ? { serialNumber } : {}),
+        ...(deviceId1 ? { deviceId1 } : {}),
+        ...(deviceId2 ? { deviceId2 } : {}),
+        ...(signature1 ? { signature1 } : {}),
+        ...(signature2 ? { signature2 } : {}),
+    };
+}
+
+export function buildStalkerSerialCfduid(serialNumber: string): string {
+    const serialPrefix = serialNumber.toLowerCase().replace(/[^a-f0-9]/g, '');
+
+    return `${serialPrefix}${STALKER_SERIAL_CFDUID_SUFFIX}`
+        .slice(0, STALKER_CFDUID_LENGTH)
+        .padEnd(STALKER_CFDUID_LENGTH, '0');
+}