Extract search bar into a standalone component and fix header design.

frontend/src/app/components/header/header.component.html

@@ -1,5 +1,5 @@
-<div>
-    <button type="button" (click)="sideMenu.open()">
+<div class="left">
+    <button type="button" (click)="sideMenu.open()" matTooltip="Click to show side menu">
         <mat-icon>menu</mat-icon>
     </button>
     <a [routerLink]="['/home']">
@@ -7,15 +7,12 @@
         <span class="title">Codiki</span>
     </a>
 </div>
-<div>
-    <div class="search-bar">
-        <input name="search-query" placeholder="Search something..." />
-        <button type="button">
-            <mat-icon>search</mat-icon>
-        </button>
+
+<div class="middle">
+    <app-publications-search-bar></app-publications-search-bar>
 </div>
-</div>
-<div>
+
+<div class="right">
     <ng-container *ngIf="isAuthenticated; else anonymousRightMenu">
         <a [routerLink]="['/disconnect']" class="button" matRipple>Disconnect</a>
     </ng-container>

frontend/src/app/components/header/header.component.scss

@@ -14,15 +14,17 @@ $headerHeight: 3.5em;
         display: flex;
         flex-direction: row;
         justify-content: center;
+        position: relative;
         height: $headerHeight;
 
-        &:nth-child(1) {
+        &.left {
             position: absolute;
             top: 0;
             left: 0;
             align-items: center;
             gap: 1em;
             padding: 0 1em;
+            z-index: 2;
 
             button {
                 background-color: #3f51b5;
@@ -70,15 +72,19 @@ $headerHeight: 3.5em;
             }
         }
 
-        &:nth-child(2) {
-            flex: 1;
-            
-            .search-bar {
+        &.middle {
             flex: 1;
             $borderRadiusValue: 10em;
             position: relative;
-                max-width: 12em;
             transition: max-width .2s ease-in-out;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            z-index: 1;
+            
+            app-publications-search-bar {
+                width: 100%;
+                max-width: 12em;
 
                 @media screen and (min-width: 435px) {
                     max-width: 16em;
@@ -107,41 +113,14 @@ $headerHeight: 3.5em;
                 @media screen and (min-width: 1100px) {
                     max-width: 50em;
                 }
-
-                input {
-                    flex: 1;
-                    width: 60%;
-                    max-width: 50em;
-                    border-radius: $borderRadiusValue;
-                    background-color: white;
-                    border: solid 1px #ddd;
-                    padding: .2em 2.7em .2em 1em;
-                    height: 2em;
-                }
-    
-                button {
-                    position: absolute;
-                    display: flex;
-                    align-items: center;
-                    border-radius: $borderRadiusValue;
-                    background-color: white;
-                    border: none;
-                    margin: .5em 0;
-                    right: 1.1em;
-                    color: #aaaaaa;
-    
-                    &:hover {
-                        background-color: #eee;
-                        cursor: pointer;
-                    }
-                }
             }
         }
 
-        &:nth-child(3) {
+        &.right {
             position: absolute;
             top: 0;
             right: 0;
+            z-index: 2;
 
             a {
                 display: flex;

frontend/src/app/components/header/header.component.ts

@@ -6,18 +6,36 @@ import { AuthenticationService } from '../../core/service/authentication.service
 import { CommonModule } from '@angular/common';
 import { SideMenuComponent } from '../side-menu/side-menu.component';
 import { MatRippleModule } from '@angular/material/core';
+import { FormControl, ReactiveFormsModule } from '@angular/forms';
+import { PublicationsSearchBarComponent } from '../publications-search-bar/publications-search-bar.component';
+import { MatTooltipModule } from '@angular/material/tooltip';
 
 @Component({
   selector: 'app-header',
   standalone: true,
-  imports: [CommonModule, MatButtonModule, MatIconModule, RouterModule, SideMenuComponent, MatRippleModule],
+  imports: [
+    CommonModule,
+    MatButtonModule,
+    MatIconModule,
+    RouterModule,
+    SideMenuComponent,
+    MatRippleModule,
+    ReactiveFormsModule,
+    PublicationsSearchBarComponent,
+    MatTooltipModule
+  ],
   templateUrl: './header.component.html',
   styleUrl: './header.component.scss',
 })
 export class HeaderComponent {
   private authenticationService = inject(AuthenticationService);
+  searchControl = new FormControl('');
 
   get isAuthenticated(): boolean {
     return this.authenticationService.isAuthenticated();
   }
+  
+  searchPublications(): void {
+
+  }
 }

frontend/src/app/components/publications-search-bar/publications-search-bar.component.html

@@ -0,0 +1,6 @@
+<form [formGroup]="formGroup">
+    <input name="search-query" placeholder="Search something..." formControlName="criteria"/>
+    <button type="submit" (click)="searchPublications()">
+        <mat-icon>search</mat-icon>
+    </button>
+</form>

frontend/src/app/components/publications-search-bar/publications-search-bar.component.scss

@@ -0,0 +1,37 @@
+:host {
+    $borderRadiusValue: 10em;
+    position: relative;
+    flex-direction: row;
+    align-items: center;
+
+    form {
+        display: flex;
+
+        input {
+            flex: 1;
+            border-radius: $borderRadiusValue;
+            background-color: white;
+            border: solid 1px #ddd;
+            padding: .2em 2.7em .2em 1em;
+            height: 2em;
+            width: 100%;
+        }
+    
+        button {
+            position: absolute;
+            display: flex;
+            align-items: center;
+            border-radius: $borderRadiusValue;
+            background-color: white;
+            border: none;
+            top: .4em;
+            right: 0;
+            color: #aaaaaa;
+    
+            &:hover {
+                background-color: #eee;
+                cursor: pointer;
+            }
+        }
+    }
+}

frontend/src/app/components/publications-search-bar/publications-search-bar.component.ts

@@ -0,0 +1,31 @@
+import { HttpParams } from "@angular/common/http";
+import { Component, inject } from "@angular/core";
+import { FormBuilder, FormControl, ReactiveFormsModule, Validators } from "@angular/forms";
+import { MatIconModule } from "@angular/material/icon";
+import { Router } from "@angular/router";
+
+
+@Component({
+    selector: 'app-publications-search-bar',
+    templateUrl: './publications-search-bar.component.html',
+    styleUrl: './publications-search-bar.component.scss',
+    standalone: true,
+    imports: [
+        ReactiveFormsModule,
+        MatIconModule
+    ],
+    providers: []
+})
+export class PublicationsSearchBarComponent {
+    private formBuilder = inject(FormBuilder);
+    private router = inject(Router);
+    formGroup = this.formBuilder.group({
+        criteria: new FormControl<string | undefined>('', [Validators.required])
+    });
+
+    searchPublications(): void {
+        let queryParams = new HttpParams();
+        queryParams = queryParams.set('query', this.formGroup.controls.criteria.value ?? '');
+        this.router.navigate(['/publications'], {queryParams});
+    }
+}

frontend/src/app/components/publications-search-bar/publications-search-bar.service.ts

@@ -0,0 +1,18 @@
+import { HttpParams } from "@angular/common/http";
+import { inject, Injectable } from "@angular/core";
+import { Router } from "@angular/router";
+import { BehaviorSubject } from "rxjs";
+
+@Injectable()
+export class PublicationsSearchBarService {
+    private router = inject(Router);
+    private criteriaSubject = new BehaviorSubject<string>('');
+
+    private cri
+
+    searchPublications(): void {
+        let queryParams = new HttpParams();
+        queryParams = queryParams.set('query', this.criteriaSubject.value);
+        this.router.navigate(['/publications'], {queryParams});
+    }
+}