headless_lms_server/domain/csv_export/
exercise_tasks_export.rs

1use anyhow::Result;
2use bytes::Bytes;
3
4use futures::TryStreamExt;
5
6use async_trait::async_trait;
7use models::exercise_tasks;
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 CourseExerciseTasksExportOperation {
25    pub course_id: Uuid,
26}
27
28#[async_trait]
29impl CsvExportDataLoader for CourseExerciseTasksExportOperation {
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_exercise_tasks(
37            &mut *conn,
38            self.course_id,
39            CSVExportAdapter {
40                sender,
41                authorization_token: token,
42            },
43        )
44        .await
45    }
46}
47
48/// Writes the course exercise tasks with pravate spec as csv into the writer
49pub async fn export_course_exercise_tasks<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        "id".to_string(),
59        "created_at".to_string(),
60        "updated_at".to_string(),
61        "exercise_type".to_string(),
62        "private_spec".to_string(),
63        "exercise_name".to_string(),
64        "course_module_id".to_string(),
65        "course_module_name".to_owned(),
66    ]);
67
68    let mut stream = exercise_tasks::stream_course_exercise_tasks(conn, course_id);
69
70    let writer = CsvWriter::new_with_initialized_headers(writer, headers).await?;
71    while let Some(next) = stream.try_next().await? {
72        let csv_row = vec![
73            next.id.to_string(),
74            next.created_at.to_rfc3339(),
75            next.updated_at.to_rfc3339(),
76            next.exercise_type.to_string(),
77            next.private_spec
78                .map(|o| o.to_string())
79                .unwrap_or_else(|| "".to_string()),
80            next.exercise_name.to_string(),
81            next.course_module_id.to_string(),
82            next.course_module_name
83                .map(|o| o.to_string())
84                .unwrap_or_else(|| "Default module".to_string()),
85        ];
86        writer.write_record(csv_row);
87    }
88    let writer = writer.finish().await?;
89    Ok(writer)
90}
headless_lms_server/domain/csv_export/exercise_tasks_export.rs

headless_lms_server/domain/csv_export/
exercise_tasks_export.rs
