improve error handling part 4 - added thiserror

Cargo.lock

@@ -1089,7 +1089,7 @@ dependencies = [
  "sha2",
  "smallvec",
  "subprocess",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "uuid",
 ]
@@ -1358,6 +1358,7 @@ dependencies = [
  "mysql",
  "sprintf",
  "termsize",
+ "thiserror 2.0.12",
  "time",
 ]
 
@@ -1369,7 +1370,7 @@ checksum = "ba009ff324d1fc1b900bd1fdb31564febe58a8ccc8a6fdbb93b543d33b13ca43"
 dependencies = [
  "getrandom",
  "libredox",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -1708,7 +1709,16 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
+dependencies = [
+ "thiserror-impl 2.0.12",
 ]
 
 [[package]]
@@ -1722,6 +1732,17 @@ dependencies = [
  "syn 2.0.90",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.90",
+]
+
 [[package]]
 name = "time"
 version = "0.3.37"

Cargo.toml

@@ -15,4 +15,5 @@ log = "0.4.17"
 mysql = "23.0.1"
 sprintf = "0.1.3"
 termsize = "0.1.6"
+thiserror = "2.0.12"
 time = "0.3.20"

src/cli/controller.rs

@@ -9,15 +9,23 @@ use crate::{
 
 use super::command::{Cli, Commands};
 
-pub fn process_args(args: Cli, db: Db) {
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+enum CommandError {
+    #[error("Empty search provided.")]
+    EmptySearch(),
+}
+
+pub fn process_args(args: Cli, db: Db) -> Result<(), Box<dyn std::error::Error>> {
     match args.mode {
         Commands::Merch { search } => {
             let mut merchant_service: MerchantService = container::get_merchant_service(db);
-            merchant_service.get_merchant(&search.unwrap());
+            merchant_service.get_merchant(&search.ok_or(CommandError::EmptySearch())?);
         }
         Commands::Schema { search } => {
             let mut schema_service: SchemaService = container::get_schema_service(db);
-            schema_service.get_columns(&search.unwrap())
+            schema_service.get_columns(&search.ok_or(CommandError::EmptySearch())?)
         }
         Commands::Filter {
             filter_id,
@@ -47,4 +55,6 @@ pub fn process_args(args: Cli, db: Db) {
             }
         }
     }
+
+    Ok(())
 }

src/database/db.rs

@@ -40,9 +40,11 @@ impl Db {
         })?;
 
         let location: String = env::var("LOCATION").unwrap_or_else(|_| "localhost".to_string());
-        let user: String = env::var("USERNAME").unwrap();
+        let user: String = env::var("USERNAME")
+            .map_err(|_| Box::new(InitError("Missing USERNAME in dotenv file.".to_string())))?;
         let port: String = env::var("PORT").unwrap_or_else(|_| "3306".to_string());
-        let password: String = env::var("PASSWORD").unwrap();
+        let password: String = env::var("PASSWORD")
+            .map_err(|_| Box::new(InitError("Missing PASSWORD in dotenv file.".to_string())))?;
         let db_name: String = env::var("DB").unwrap_or_else(|_| "efulfilment".to_string());
         let url: String = format!(
             "mysql://{}:{}@{}:{}/{}",
@@ -58,7 +60,7 @@ impl Db {
     }
 
     pub fn get_connection(&self) -> Result<PooledConn, mysql::Error> {
-        let pool = self.pool.lock().unwrap();
+        let pool = self.pool.lock()?;
         pool.get_conn()
     }
 }

src/main.rs

@@ -15,7 +15,6 @@ fn main() -> std::result::Result<(), Box<dyn std::error::Error>> {
     let env: &String = &Cli::parse().env.unwrap_or("local".to_string());
     let db: Db = Db::initialize(env.to_string())?;
 
-    controller::process_args(args, db);
+    controller::process_args(args, db)?;
-
     Ok(())
 }

src/repository/filter_repo.rs

@@ -22,8 +22,7 @@ impl FilterRepo {
             FROM filter f
             JOIN global_data.filter_modules fm ON fm.filter_module_id = f.filter_module_id
             WHERE f.filter_id = :filter_id
-        ")
+        ")?;
-        .unwrap();
 
         let params = params! {"filter_id" => filter_id};
         connection.exec_map(
@@ -52,8 +51,7 @@ impl FilterRepo {
             JOIN global_data.effi_user t2 on t1.upd_user = t2.user_id
             WHERE t1.filter_id = :filter_id
         ",
-        )
+        )?;
-        .unwrap();
 
         connection.exec_map(
             stat,
@@ -70,15 +68,13 @@ impl FilterRepo {
 
     pub fn find_filter_log(&mut self, filter_id: &usize) -> Result<Vec<FilterLog>, mysql::Error> {
         let mut connection: PooledConn = self.db.get_connection()?;
-        let stat = connection
+        let stat = connection.prep(
-            .prep(
             "
                 SELECT t1.run_ts, t1.error_code, t1.error_msg, t1.mysql_error
                 FROM filter_run_error_log t1
                 WHERE t1.filter_id = :filter_id
                 ",
-            )
+        )?;
-            .unwrap();
 
         connection.exec_map(
             stat,

src/repository/job_repo.rs

@@ -17,8 +17,7 @@ impl JobRepo {
 
     pub fn find_by_id(&mut self, job_id: &usize) -> Result<Vec<Job>, mysql::Error> {
         let mut connection: mysql::PooledConn = self.db.get_connection()?;
-        let stat = connection
+        let stat = connection.prep(
-            .prep(
             "SELECT 
                     jm.file_name, jm.description 
                 FROM jobs j
@@ -26,8 +25,7 @@ impl JobRepo {
                 WHERE
                 j.job_id = :job_id
             ",
-            )
+        )?;
-            .unwrap();
 
         connection.exec_map(
             stat,
@@ -41,8 +39,7 @@ impl JobRepo {
 
     pub fn find_log(&mut self, job_id: &usize) -> Result<Vec<JobLog>, mysql::Error> {
         let mut connection: mysql::PooledConn = self.db.get_connection()?;
-        let stat = connection
+        let stat = connection.prep(
-            .prep(
             "
                 SELECT jea.content, jea.upd_ts
                 FROM jobs j
@@ -51,8 +48,7 @@ impl JobRepo {
                 WHERE
                     j.job_id = :job_id
             ",
-            )
+        )?;
-            .unwrap();
 
         connection.exec_map(stat, params! {"job_id" => job_id}, |(content, upd_ts)| {
             JobLog { content, upd_ts }

src/repository/merchant_repo.rs

@@ -14,8 +14,7 @@ impl MerchantRepo {
     pub fn find_by_name_or_id(&mut self, search: &str) -> Result<Vec<Merchant>, mysql::Error> {
         let mut connection = self.db_pool.get_connection()?;
         let stat = connection
-        .prep("SELECT m_name, m_id FROM global_data.merchant WHERE m_id = :search OR m_name LIKE :search2;")
+        .prep("SELECT m_name, m_id FROM global_data.merchant WHERE m_id = :search OR m_name LIKE :search2;")?;
-        .unwrap();
 
         let search_like = format!("%{}%", search);
 

src/repository/schema_repo.rs

@@ -14,8 +14,7 @@ impl SchemaRepo {
     pub fn find_by_column(&mut self, column_name: &str) -> Result<Vec<Schema>, mysql::Error> {
         let mut connection: mysql::PooledConn = self.db.get_connection()?;
         let stat = connection
-        .prep("SELECT TABLE_NAME, COLUMN_NAME, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE column_name LIKE :c_name")
+        .prep("SELECT TABLE_NAME, COLUMN_NAME, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE column_name LIKE :c_name")?;
-        .unwrap();
 
         connection.exec_map(
             stat,