Added simpleSearch functionality to EmployeesController, solves #2

app/Controllers/Http/EmployeesController.ts

@@ -4,7 +4,6 @@ import UpdateEmployeeValidator from 'App/Validators/UpdateEmployeeValidator'
 import CreateEmployeeValidator from 'App/Validators/CreateEmployeeValidator'
 
 import Database from '@ioc:Adonis/Lucid/Database'
-import Logger from '@ioc:Adonis/Core/Logger'
 
 // TODO: #1 Implement paginator for Employee-Index
 export default class EmployeesController {
@@ -13,11 +12,22 @@ export default class EmployeesController {
 
 		const limit: number = request.qs().limit ?? 10
 		const page: number = request.qs().page ?? 1
-    const sort_by = await this.sort_by(request.qs().sort_by)
+		const sortBy = await this.sortBy(request.qs().sort_by)
 		
-    const employees = await Database.from('employees').orderBy(sort_by).paginate(page, limit)
+		const simpleSearch = await this.simpleSearch(request.qs().simple_search)
 
-    return employees
+		const employees = Database.query()
+		employees.from('employees')
+
+		if(simpleSearch) {
+			simpleSearch.columns.forEach(column => {
+				employees.orWhere(column, 'like', `%${simpleSearch.query}%`)
+			})
+		}
+
+		employees.orderBy(sortBy)
+
+		return employees.paginate(page, limit)
   	}
 
 	public async store ({request}: HttpContextContract) {
@@ -82,7 +92,7 @@ export default class EmployeesController {
 		return await Database.from('employees').where('id', params.id).delete()
 	}
 
-  private async sort_by(qs: string): Promise<{column : string, order?: 'asc' | 'desc' | undefined}[]> {
+	private async sortBy(qs: string): Promise<{column : string, order?: 'asc' | 'desc' | undefined}[]> {
     	const regex : RegExp = /(asc|desc)\((\w+)\)/gi
     	const client = Database.connection()
     	let result: {
@@ -101,4 +111,29 @@ export default class EmployeesController {
 
     	return result
   	}
+
+	private async simpleSearch(qs : string): Promise<{query: string, columns: string[]} | false>{
+		if (!qs) return false
+		
+		const regex = /([\w@.]+)(?:\((\w+(?:,\w+)*)\))*/i
+		const columns = await Database.connection().columnsInfo('employees')
+		
+		const match = qs.match(regex) ?? []
+		
+		let result: {
+			query: string,
+			columns: string[]
+		} = {
+			query: match[1] ?? '',
+			columns: []
+		}
+
+		match[2]?.split(',').filter(elem => columns.hasOwnProperty(elem.trim())).forEach((col) => {
+			result.columns.push(col.trim())
+		})
+
+		if(result.columns.length < 1) result.columns = ['first_name', 'last_name']
+
+		return result
+  	}
 }