feat: Add attendanceByDate query.

Supports fetching attendance for all members for a given date.

Fixes #72

docs/attendance.md

@@ -32,6 +32,38 @@ struct AttendanceSummary {
 
 ## Queries
 
+### Get Attendance
+Retrieve attendance records by member ID or date.
+
+```graphql
+# Get attendance by member ID
+query {
+    attendance(memberId: 1) {
+        attendanceId
+        date
+        isPresent
+        timeIn
+        timeOut
+    }
+}
+```
+
+Get all attendance for a specific date
+
+```graphql
+query {
+    attendanceByDate(date: "2025-02-27") {
+        attendanceId
+        memberId
+        name
+        year
+        isPresent
+        timeIn
+        timeOut
+    }
+}
+```
+
 ### Mark Attendance
 Record a member's attendance for the day.
 

src/graphql/queries/attendance_queries.rs

@@ -1,12 +1,15 @@
 use std::sync::Arc;
 
+use crate::models::{
+    attendance::{Attendance, AttendanceWithMember},
+    member::Member,
+};
 use async_graphql::{Context, Object, Result};
+use chrono::NaiveDate;
 use sqlx::PgPool;
 
-use crate::models::{attendance::Attendance, member::Member};
-
 /// Sub-query for the [`Attendance`] table. The queries are:
-/// * attendance - get a specific member's attendance details using their member_id, roll_no or discord_id
+/// * attendance - get a specific member's attendance details using their member_id, roll_no or discord_id, or by date for all members.
 #[derive(Default)]
 pub struct AttendanceQueries;
 
@@ -66,4 +69,26 @@ impl AttendanceQueries {
 
         Ok(attendance_query)
     }
+
+    // Query to get attendance by date
+    async fn attendance_by_date(
+        &self,
+        ctx: &Context<'_>,
+        date: NaiveDate,
+    ) -> Result<Vec<AttendanceWithMember>> {
+        let pool = ctx.data::<Arc<PgPool>>().expect("Pool must be in context.");
+
+        let records = sqlx::query_as::<_, AttendanceWithMember>(
+            "SELECT a.attendance_id, a.member_id, a.date, a.is_present, 
+                    a.time_in, a.time_out, m.name, m.year
+             FROM Attendance a
+             JOIN Member m ON a.member_id = m.member_id
+             WHERE a.date = $1",
+        )
+        .bind(date)
+        .fetch_all(pool.as_ref())
+        .await?;
+
+        Ok(records)
+    }
 }

src/models/attendance.rs

@@ -48,3 +48,17 @@ pub struct MarkAttendanceInput {
     pub date: NaiveDate,
     pub hmac_signature: String,
 }
+
+/// This struct combines attendance data with member name for queries that need both.
+/// It joins the Attendance table with Member to include the member's name.
+#[derive(SimpleObject, FromRow)]
+pub struct AttendanceWithMember {
+    pub attendance_id: i32,
+    pub member_id: i32,
+    pub date: NaiveDate,
+    pub is_present: bool,
+    pub time_in: Option<NaiveTime>,
+    pub time_out: Option<NaiveTime>,
+    pub name: String,
+    pub year: i32,
+}