Phase 2.2: MongoDB connection and models

backend/src/models/family.rs

@@ -0,0 +1,43 @@
+use serde::{Deserialize, Serialize};
+use mongodb::{bson::{doc, oid::ObjectId, DateTime}, Collection};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Family {
+    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
+    pub id: Option<ObjectId>,
+    #[serde(rename = "familyId")]
+    pub family_id: String,
+    #[serde(rename = "name")]
+    pub name: String,
+    #[serde(rename = "nameIv")]
+    pub name_iv: String,
+    #[serde(rename = "nameAuthTag")]
+    pub name_auth_tag: String,
+    #[serde(rename = "memberIds")]
+    pub member_ids: Vec<String>,
+    #[serde(rename = "createdAt")]
+    pub created_at: DateTime,
+    #[serde(rename = "updatedAt")]
+    pub updated_at: DateTime,
+}
+
+pub struct FamilyRepository {
+    collection: Collection<Family>,
+}
+
+impl FamilyRepository {
+    pub fn new(collection: Collection<Family>) -> Self {
+        Self { collection }
+    }
+    
+    pub async fn create(&self, family: &Family) -> mongodb::error::Result<()> {
+        self.collection.insert_one(family, None).await?;
+        Ok(())
+    }
+    
+    pub async fn find_by_family_id(&self, family_id: &str) -> mongodb::error::Result<Option<Family>> {
+        self.collection
+            .find_one(doc! { "familyId": family_id }, None)
+            .await
+    }
+}