Build tree couples

geneit_app/src/api/CoupleApi.ts

@@ -1,5 +1,6 @@
 import { APIClient } from "./ApiClient";
 import { DateValue, Member } from "./MemberApi";
+import { ServerApi } from "./ServerApi";
 
 interface CoupleApiInterface {
   id: number;
@@ -99,6 +100,10 @@ export class Couple implements CoupleApiInterface {
       day: this.divorce_day,
     };
   }
+
+  otherPersonID(id: number): number | undefined {
+    return id === this.wife ? this.husband : this.wife;
+  }
 }
 
 export class CouplesList {
@@ -137,6 +142,10 @@ export class CouplesList {
   getAllOf(m: Member): Couple[] {
     return this.filter((c) => c.husband === m.id || c.wife === m.id);
   }
+
+  getFirstMariedOf(m: Member): Couple | undefined {
+    return this.getAllOf(m).find((c) => (c.state = "M"));
+  }
 }
 
 export class CoupleApi {