feat: introduce RegExp struct for regex patterns and update import ha…

…ndlers to use it

src/consts/mod.rs

@@ -1 +1,2 @@
-pub mod global;
+pub mod global;
+pub mod regexp;

src/consts/regexp.rs

@@ -0,0 +1,9 @@
+pub struct RegExp;
+
+impl RegExp {
+
+    pub const USE_CASE: &'static str = r"(?i)(USE\s+`?)(\w+)(`?)";
+    pub const CREATE_TABLE: &'static str = r"(?i)CREATE TABLE\s+`?(\w+)`?";
+    pub const CREATE_DATABASE_CASES: &'static str = r"(?i)CREATE DATABASE\s+(`?)(\w+)(`?)\s*(IF NOT EXISTS)?;";
+
+}

src/engine/import.rs

@@ -22,6 +22,7 @@ use std::{
 };
 
 use crate::{
+    consts::regexp::RegExp,
     engine::connection::Connection,
     helpers::import_handlers::ImportHandlers,
 
@@ -98,7 +99,7 @@ impl Import {
 
         let dump_content = ImportHandlers::new(&self.dbname, &dump_content).check_db_name();
 
-        let create_table_regex = Regex::new(r"(?i)CREATE TABLE\s+`?(\w+)`?").unwrap();
+        let create_table_regex = Regex::new(RegExp::CREATE_TABLE).unwrap();
 
         for statement in dump_content.split(';') {
             let trimmed = statement.trim();

src/engine/transfer.rs

@@ -22,6 +22,7 @@ use std::{
 };
 
 use crate::{
+    consts::regexp::RegExp,
     engine::connection::Connection,
     helpers::import_handlers::ImportHandlers,
 
@@ -106,7 +107,7 @@ impl Transfer {
 
         let dump_content = ImportHandlers::new(&self.dbname, &dump_content).check_db_name();
 
-        let create_table_regex = Regex::new(r"(?i)CREATE TABLE\s+`?(\w+)`?").unwrap();
+        let create_table_regex = Regex::new(RegExp::CREATE_TABLE).unwrap();
 
         for statement in dump_content.split(';') {
             let trimmed = statement.trim();

src/helpers/import_handlers.rs

@@ -1,5 +1,7 @@
 use regex::Regex;
 
+use crate::consts::regexp::RegExp;
+
 pub struct ImportHandlers {
     dbname: String,
     dump_content: String,
@@ -15,8 +17,8 @@ impl ImportHandlers {
     }
 
     pub fn check_db_name(&self) -> String {
-        let db_regex = Regex::new(r"(?i)CREATE DATABASE\s+(`?)(\w+)(`?)\s*(IF NOT EXISTS)?;").unwrap();
-        let use_db_regex = Regex::new(r"(?i)(USE\s+`?)(\w+)(`?)").unwrap();
+        let use_db_regex = Regex::new(RegExp::USE_CASE).unwrap();
+        let db_regex = Regex::new(RegExp::CREATE_DATABASE_CASES).unwrap();
 
         let content = db_regex.replace_all(&self.dump_content, |caps: &regex::Captures| {
             let db_name = if &caps[2] != self.dbname {