headless_lms_server/domain/csv_export/
users_export.rs

1use anyhow::Result;
2use bytes::Bytes;
3
4use futures::TryStreamExt;
5use headless_lms_models::user_details;
6
7use async_trait::async_trait;
8
9use crate::domain::csv_export::CsvWriter;
10
11use sqlx::PgConnection;
12use std::io::Write;
13use tokio::sync::mpsc::UnboundedSender;
14
15use uuid::Uuid;
16
17use crate::prelude::*;
18
19use super::{
20    super::authorization::{AuthorizationToken, AuthorizedResponse},
21    CSVExportAdapter, CsvExportDataLoader,
22};
23
24pub struct UsersExportOperation {
25    pub course_id: Uuid,
26}
27
28#[async_trait]
29impl CsvExportDataLoader for UsersExportOperation {
30    async fn load_data(
31        &self,
32        sender: UnboundedSender<Result<AuthorizedResponse<Bytes>, ControllerError>>,
33        conn: &mut PgConnection,
34        token: AuthorizationToken,
35    ) -> anyhow::Result<CSVExportAdapter> {
36        export_course_user_details(
37            &mut *conn,
38            self.course_id,
39            CSVExportAdapter {
40                sender,
41                authorization_token: token,
42            },
43        )
44        .await
45    }
46}
47
48/// Writes user details for users with any exercise submissions in courseas csv into the writer
49pub async fn export_course_user_details<W>(
50    conn: &mut PgConnection,
51    course_id: Uuid,
52    writer: W,
53) -> Result<W>
54where
55    W: Write + Send + 'static,
56{
57    let headers = IntoIterator::into_iter([
58        "user_id".to_string(),
59        "created_at".to_string(),
60        "updated_at".to_string(),
61        "first_name".to_string(),
62        "last_name".to_string(),
63        "email".to_string(),
64    ]);
65
66    let mut stream =
67        user_details::stream_users_details_having_user_exercise_states_on_course(conn, course_id);
68
69    let writer = CsvWriter::new_with_initialized_headers(writer, headers).await?;
70    while let Some(next) = stream.try_next().await? {
71        let csv_row = vec![
72            next.user_id.to_string(),
73            next.created_at.to_rfc3339(),
74            next.updated_at.to_rfc3339(),
75            next.first_name.unwrap_or_default(),
76            next.last_name.unwrap_or_default(),
77            next.email.to_string(),
78        ];
79        writer.write_record(csv_row);
80    }
81    let writer = writer.finish().await?;
82    Ok(writer)
83}
headless_lms_server/domain/csv_export/users_export.rs

headless_lms_server/domain/csv_export/
users_export.rs
