[BE][Certs] Batch create registers in a single SQL query

backend/README.md

@@ -28,6 +28,21 @@ Si se quiere lanzar mediante Jenkins ya hay un `Jenkinsfile` una carpeta arriba.
 Modificar lo que sea necesario para ejecutar en el entorno objetivo.
 
 
+## Base de datos
+
+**IMPORTANTE**: Este sistema (backend y frontend) depende de que la base de datos tenga ciertos
+registros con ciertos ids, estos valores estan escritos en el código (hard coded)
+
+- La tabla `custom_label` debe tener una fila con id: `0` y valor `<vacio>`
+- La tabla `course` debe tener filas para los cursos matpel:
+    - Matpel 1 con id `10`
+    - Matpel 2 con id `11`
+    - Matpel 3 con id `12`
+
+Estos valores deben estar en la base de datos. Si se cambiaron, es necesario
+cambiarlos en el código (sería bueno sacarlos de .env).
+
+
 ## Funcionamiento
 
 Básicamente, al iniciar el backend realiza lo siguiente:

backend/src/controller/register/mod.rs

@@ -17,6 +17,8 @@ pub fn options_delete(_r: i32) -> Status {
 
 #[post("/register/batch", format = "json", data = "<data>")]
 pub async fn insert_all(data: Json<Vec<RegisterCreate>>) -> (Status, Json<JsonResult<()>>) {
+    // Old way, inserts one by one
+    /*
     for register_create in data.iter() {
         let res = register_create.create().await;
 
@@ -30,6 +32,18 @@ pub async fn insert_all(data: Json<Vec<RegisterCreate>>) -> (Status, Json<JsonRe
     }
 
     (Status::Ok, JsonResult::ok(()))
+     */
+
+    match RegisterCreate::batch_create(data.into_inner()).await {
+        Ok(_) => (Status::Ok, JsonResult::ok(())),
+        Err(err) => {
+            eprintln!("Error creating register: {:?}", err);
+            (
+                Status::InternalServerError,
+                JsonResult::err(format!("Error creando registros: {}", err)),
+            )
+        }
+    }
 }
 
 #[get("/register/<dni>")]

backend/src/controller/scans/mod.rs

@@ -237,13 +237,13 @@ fn get_image_info(path: PathBuf) -> ScanInfo {
             // Here, an iid is found. Extract it & return
 
             let dni_length = p - 31;
-            let equals_pos = match url.find('=') {
+            let equals_pos =
+                match url.find('=') {
                     Some(p) => p,
-                None => {
-                    return ScanInfo::Error(
-                        "QR invalido: La URL tiene signo de interrogacion (?) pero no igual (=).".into(),
-                    )
-                }
+                    None => return ScanInfo::Error(
+                        "QR invalido: La URL tiene signo de interrogacion (?) pero no igual (=)."
+                            .into(),
+                    ),
                 };
 
             let dni = url.chars().skip(31).take(dni_length).collect::<String>();

backend/src/main.rs

@@ -1,9 +1,7 @@
 use cors::Cors;
-use once_cell::sync::OnceCell;
-use sqlx::mysql::MySqlPoolOptions;
-use sqlx::{MySql, Pool, MySqlConnection};
-use std::env;
 use sqlx::Connection;
+use sqlx::MySqlConnection;
+use std::env;
 
 #[macro_use]
 extern crate rocket;

backend/src/model/course.rs

@@ -35,7 +35,9 @@ impl Course {
             }
         };
 
-        let results = sqlx::query!("SELECT * FROM course").fetch_all(&mut db).await;
+        let results = sqlx::query!("SELECT * FROM course")
+            .fetch_all(&mut db)
+            .await;
 
         let results = match results {
             Ok(res) => res,

backend/src/model/register.rs

@@ -1,3 +1,5 @@
+use std::collections::{HashMap, HashSet};
+
 use rocket::form::validate::Contains;
 use serde::{Deserialize, Serialize};
 use sqlx::{Executor, Row};
@@ -138,6 +140,165 @@ impl RegisterCreate {
 
         Ok(new_max)
     }
+
+    pub async fn batch_create(registers: Vec<RegisterCreate>) -> Result<(), String> {
+        // Collect all the courses ids in a set
+        let mut course_ids = std::collections::HashSet::<i32>::new();
+        for register in registers.iter() {
+            let course_id = register.course_id;
+
+            // TODO: Move hardcoded values to .env
+            // If the course id is 10, 11 or 12 (matpel ids), add all of them to the set
+            if course_id == 10 || course_id == 11 || course_id == 12 {
+                course_ids.insert(10);
+                course_ids.insert(11);
+                course_ids.insert(12);
+            } else {
+                course_ids.insert(course_id);
+            }
+        }
+
+        // Get next values from all courses ids
+        // This is a map of course_id -> next_register_code,
+        // and will be updated for every register to insert
+        let mut current_register_codes = Self::get_next_register_codes(course_ids).await?;
+
+        // If there's matpel courses (ids 10, 11 & 12), use only id 10, and set it to the highest value
+        if current_register_codes.contains_key(&10) {
+            // Get the highest value
+            let max = current_register_codes
+                .iter()
+                .filter(|(id, _)| *id == &10 || *id == &11 || *id == &12)
+                .map(|(_, value)| value)
+                .max()
+                .unwrap_or(&50);
+
+            current_register_codes.insert(10, *max);
+        }
+
+        // Create values for each register
+        let mut values = Vec::<String>::new();
+        for register in registers.iter() {
+            let course_id = register.course_id;
+
+            // This is the key in the hash map for the current course.
+            let course_code_key = if course_id == 10 || course_id == 11 || course_id == 12 {
+                // As per above, matpel courses share codes. Use the value at 10
+                10
+            } else {
+                course_id
+            };
+
+            // Get the next register code for this course
+            let next_register_code = *current_register_codes.get_mut(&course_code_key).unwrap() + 1;
+
+            // Get the custom label id
+            // This still requires several trips to the database, but:
+            // - Only if there's a custom label
+            // - Custom labels are used only in machineries certs
+            // - Usually there's between 1-2 machineries per request (I personally have never seen more than 3)
+            let custom_label_id = {
+                if register.custom_label.is_empty() {
+                    1
+                } else {
+                    // Get custom_label_id from db based of self.custom_label
+                    let id = CustomLabel::get_id_by_value(&register.custom_label).await?;
+
+                    if id > 0 {
+                        id
+                    } else {
+                        CustomLabel::create(&register.custom_label).await?
+                    }
+                }
+            };
+
+            // Current date in YYYY-MM-DD format
+            let current_date = chrono::Local::now().format("%Y-%m-%d").to_string();
+
+            // Create the value string
+            let value = format!(
+                "({}, '{}', '{}', {}, {}, {}, {})",
+                next_register_code,
+                current_date,
+                register.date,
+                custom_label_id,
+                register.is_preview,
+                register.person_id,
+                register.course_id
+            );
+
+            // Add it to the list
+            values.push(value);
+
+            // Update the current register code
+            current_register_codes.insert(course_code_key, next_register_code);
+        }
+
+        // Insert all in a single statement
+        let sql = format!(
+            "INSERT INTO register (
+                register_code,
+                register_creation_date,
+                register_display_date,
+                register_custom_label,
+                register_is_preview,
+                register_person_id,
+                register_course_id
+            ) VALUES {}",
+            values.join(", ")
+        );
+
+        let mut db = db().await?;
+        match db.fetch_all(sql.as_str()).await {
+            Ok(_) => Ok(()),
+            Err(err) => {
+                log::error!("Error fetching course & person: {:?}", err);
+                return Err("Error inserting multiple registers".into());
+            }
+        }
+    }
+
+    async fn get_next_register_codes(
+        course_ids: HashSet<i32>,
+    ) -> Result<HashMap<i32, i32>, String> {
+        let mut db = db().await?;
+
+        let sql = format!(
+            "SELECT MAX(register_code) AS max, register_course_id
+            FROM register
+            WHERE register_course_id IN ({})
+            GROUP BY register_course_id",
+            course_ids
+                .iter()
+                .map(|id| id.to_string())
+                .collect::<Vec<String>>()
+                .join(",")
+        );
+
+        log::info!("SQL: {}", sql);
+
+        let result = match db.fetch_all(sql.as_str()).await {
+            Ok(res) => res,
+            Err(err) => {
+                log::error!("Error fetching max register codes: {:?}", err);
+                return Err("Error fetching max register codes".into());
+            }
+        };
+
+        // Convert to a hashmap
+        let data = result
+            .iter()
+            .map(|row| {
+                (
+                    row.try_get("register_course_id").unwrap(),
+                    // TODO: This 50 (the minimum value for new registers) should be defined in .env
+                    row.try_get("max").unwrap_or(50),
+                )
+            })
+            .collect();
+
+        Ok(data)
+    }
 }
 
 #[derive(Serialize, Deserialize, Clone)]

frontend/src/certs/NewRegister/RegisterPreview.tsx

@@ -18,11 +18,14 @@ function wait(ms: number) {
     return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
+// TODO: Refactor
 export function RegisterPreview(props: {selections: Array<RegistrationPreview>, personId: number | null, onDelete: (v: number) => void, onRegister: () => void}) {
+    const [error, setError] = createSignal("");
     const [loading, setLoading] = createSignal(false);
 
     const submit = async() => {
         setLoading(true);
+        setError("");
 
         await wait(2000);
 
@@ -41,11 +44,12 @@ export function RegisterPreview(props: {selections: Array<RegistrationPreview>,
             console.log("Create register: success");
             // Custom labels may have changed, reload them
             loadCustomLabels();
+            props.onRegister();
         } else {
             console.log(`error. ${result}`);
+            setError(result);
         }
 
-        props.onRegister();
         setLoading(false);
     };
 
@@ -85,6 +89,12 @@ export function RegisterPreview(props: {selections: Array<RegistrationPreview>,
                         Registrar {props.selections.length} cursos
                     </span>
                 </button>
+
+                <Show when={error() !== ""}>
+                    <p class="bg-c-on-error text-c-error p-2 rounded-md">
+                        {error()}
+                    </p>
+                </Show>
             </div>
         </FilledCard>
     );
@@ -140,6 +150,6 @@ async function createRegisters(data: RegisterBatchCreate): Promise<null | string
         return null;
     } else {
         const data = await response.json();
-        return JSON.stringify(data);
+        return data.Error.reason;
     }
 }