refactor: improve qualifications component structure and error handling #45
@ -1,118 +1,127 @@
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<section class="!space-y-6 mb-6">
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<section class="space-y-6 mb-6">
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@defer {
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@if (qualifications$ | async; as qualifications) {
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<div class="!space-y-6">
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<div class="!flex !justify-between !items-center">
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<div class="!flex !items-center !gap-4">
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<h2 class="!text-2xl !font-semibold !text-gray-900 !shrink-0">Qualifications</h2>
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<mat-form-field class="!m-0" subscriptSizing="dynamic">
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<mat-icon matPrefix class="!text-gray-400 !mr-2">search</mat-icon>
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<input matInput
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type="text"
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placeholder="Search qualifications..."
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(keyup)="filterQualifications($event)">
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<div matSuffix class="!w-[24px] !h-[24px] !ml-2 !flex !items-center !justify-center">
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<mat-progress-spinner [diameter]="20" mode="indeterminate"
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[class.!opacity-0]="!isSearching"
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[class.!opacity-100]="isSearching"
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class="!transition-opacity"></mat-progress-spinner>
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</div>
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</mat-form-field>
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@if (error$ | async; as error) {
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<div class="bg-red-50 p-4 rounded-lg border border-red-200">
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<div class="flex items-start gap-3">
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<mat-icon class="text-red-600 text-2xl w-8 h-8">error</mat-icon>
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<div>
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<p class="text-gray-800 font-medium">{{ error }}</p>
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<p class="text-gray-600 mt-1 text-sm">Please try refreshing the page.</p>
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</div>
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<button mat-flat-button color="primary" class="!bg-blue-600 !text-white !shrink-0"
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(click)="openCreateModal()">
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<mat-icon class="!mr-2">add</mat-icon>
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Add Qualification
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</button>
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</div>
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@if (qualifications) {
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<div class="!overflow-x-auto !rounded-lg !bg-gray-50 !p-4">
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<table mat-table [dataSource]="qualifications" matSort class="!w-full">
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<ng-container matColumnDef="skill">
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<th mat-header-cell *matHeaderCellDef class="!text-left !w-full">Skill</th>
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<td mat-cell *matCellDef="let qualification" class="!py-4">
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<div class="!flex !items-center">
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<div class="!h-10 !w-10 !rounded-full !bg-blue-100 !flex !items-center !justify-center !mr-3">
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<span class="!text-blue-600 !font-medium">
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{{ qualification.skill[0]?.toUpperCase() }}
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</span>
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</div>
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<div>
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<a class="!text-blue-600 hover:!underline cursor-pointer"
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[matTooltip]="'Click to view qualification details'"
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(click)="openDetailsModal(qualification)">
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{{ qualification.skill }}
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</a>
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</div>
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</div>
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</td>
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</ng-container>
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<ng-container matColumnDef="actions">
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<th mat-header-cell *matHeaderCellDef class="!text-right !w-[120px]">Actions</th>
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<td mat-cell *matCellDef="let qualification" class="!text-right !py-4 !whitespace-nowrap">
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<div class="!flex !justify-end !items-center !gap-1">
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<button mat-icon-button
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color="primary"
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[matTooltip]="'Edit qualification'"
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(click)="openEditModal(qualification)">
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<mat-icon>edit</mat-icon>
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</button>
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<button mat-icon-button
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color="warn"
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[matTooltip]="'Delete qualification'"
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(click)="openDeleteModal(qualification.id)">
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<mat-icon>delete</mat-icon>
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</button>
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</div>
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</td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
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</table>
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</div>
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} @else {
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<mat-card class="!text-center !py-8">
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<mat-card-content>
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<mat-icon class="!w-8 !h-8 !text-gray-400 !mb-4">school</mat-icon>
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<p class="!text-gray-600">No qualifications found</p>
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</mat-card-content>
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</mat-card>
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}
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</div>
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} @else {
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@if (qualifications$ | async; as qualifications) {
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<div class="space-y-6">
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<header class="flex justify-between items-center">
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<div class="flex items-center gap-4">
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<h2 class="text-2xl font-semibold text-gray-900 shrink-0">Qualifications</h2>
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<mat-form-field class="m-0" subscriptSizing="dynamic">
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<mat-icon matPrefix class="text-gray-400 mr-2">search</mat-icon>
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<input matInput
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type="text"
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placeholder="Search qualifications..."
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(input)="onSearch($event)">
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<div matSuffix class="w-[24px] h-[24px] ml-2 flex items-center justify-center">
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@if (isSearching$ | async) {
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<mat-progress-spinner
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[diameter]="20"
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mode="indeterminate"
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class="transition-opacity">
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</mat-progress-spinner>
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}
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</div>
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</mat-form-field>
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</div>
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<button mat-flat-button
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color="primary"
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class="!bg-blue-600 text-white shrink-0"
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(click)="createQualification()">
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<mat-icon class="mr-2">add</mat-icon>
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Add Qualification
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</button>
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</header>
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@if (qualifications.length) {
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<div class="overflow-x-auto rounded-lg bg-gray-50 p-4">
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<table mat-table [dataSource]="qualifications" matSort class="w-full">
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<ng-container matColumnDef="skill">
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<th mat-header-cell *matHeaderCellDef class="text-left w-full">Skill</th>
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<td mat-cell *matCellDef="let qualification" class="py-4">
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<div class="flex items-center">
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<div class="h-10 w-10 rounded-full bg-blue-100 flex items-center justify-center mr-3">
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<span class="text-blue-600 font-medium">
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{{ qualification.skill[0]?.toUpperCase() }}
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</span>
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</div>
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<div>
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<button class="text-blue-600 hover:underline"
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[matTooltip]="'View qualification details'"
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(click)="viewQualificationDetails(qualification)">
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{{ qualification.skill }}
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</button>
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</div>
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</div>
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</td>
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</ng-container>
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<ng-container matColumnDef="actions">
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<th mat-header-cell *matHeaderCellDef class="text-right w-[120px]">Actions</th>
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<td mat-cell *matCellDef="let qualification" class="text-right py-4 whitespace-nowrap">
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<div class="flex justify-end items-center gap-1">
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<button mat-icon-button
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color="primary"
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[matTooltip]="'Edit qualification'"
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(click)="editQualification(qualification)">
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<mat-icon>edit</mat-icon>
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</button>
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<button mat-icon-button
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color="warn"
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[matTooltip]="'Delete qualification'"
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(click)="deleteQualification(qualification.id)">
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<mat-icon>delete</mat-icon>
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</button>
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</div>
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</td>
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</ng-container>
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<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
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<tr mat-row *matRowDef="let row; columns: displayedColumns"></tr>
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</table>
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</div>
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} @else {
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<mat-card class="text-center py-8">
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<mat-card-content>
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<mat-icon class="w-8 h-8 text-gray-400 mb-4">school</mat-icon>
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<p class="text-gray-600">No qualifications found</p>
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</mat-card-content>
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</mat-card>
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}
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</div>
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}
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}
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} @placeholder {
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<div class="!space-y-6">
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<div class="!animate-pulse">
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<div class="!flex !justify-between !items-center !mb-8">
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<div class="!h-8 !bg-gray-200 !rounded !w-1/4"></div>
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<div class="!h-10 !bg-gray-200 !rounded !w-32"></div>
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<div class="space-y-6">
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<div class="animate-pulse">
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<div class="flex justify-between items-center mb-8">
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<div class="h-8 bg-gray-200 rounded w-1/4"></div>
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<div class="h-10 bg-gray-200 rounded w-32"></div>
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</div>
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<div class="!bg-gray-50 !p-4 !rounded-lg">
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<div class="!space-y-4">
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<div class="!h-10 !bg-gray-200 !rounded"></div>
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<div class="bg-gray-50 p-4 rounded-lg">
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<div class="space-y-4">
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<div class="h-10 bg-gray-200 rounded"></div>
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@for (i of [1, 2, 3]; track i) {
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<div class="!h-16 !bg-white !rounded-lg !shadow-sm"></div>
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<div class="h-16 bg-white rounded-lg shadow-sm"></div>
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}
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</div>
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</div>
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</div>
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</div>
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} @error {
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<div class="bg-red-50 p-3 md:p-4 rounded-lg border border-red-200">
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<div class="flex items-start space-x-2 md:space-x-3">
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<mat-icon class="text-red-600 text-xl md:text-2xl !w-8 !h-8">error</mat-icon>
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<div>
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<p class="text-gray-800 font-medium text-sm md:text-base">There was an error loading the qualifications.</p>
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<p class="text-gray-600 mt-1 text-xs md:text-sm">Please try refreshing the page.</p>
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</div>
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</div>
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</div>
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} @loading {
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<div class="!flex !justify-center !items-center !py-12">
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<mat-spinner diameter="48" class="!text-blue-600"></mat-spinner>
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</div>
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@if (isLoading$ | async) {
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<div class="flex justify-center items-center py-12">
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<mat-spinner diameter="48" class="text-blue-600"></mat-spinner>
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</div>
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}
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}
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</section>
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@ -1,26 +1,188 @@
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import {Component, inject, OnInit} from '@angular/core';
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import {CommonModule} from '@angular/common';
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import {catchError, debounceTime, distinctUntilChanged, filter, map, Observable, of, retry, Subject} from 'rxjs';
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import {HttpErrorResponse} from '@angular/common/http';
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import {Qualification} from "../Qualification";
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import {MatDialog} from "@angular/material/dialog";
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import QualificationService from "../../services/qualification.service";
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import {CreateComponent} from "../create/create.component";
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import {EditComponent} from "../edit/edit.component";
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import {DeleteComponent} from "../delete/delete.component";
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import {MatCardModule} from '@angular/material/card';
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import {MatButtonModule} from '@angular/material/button';
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import {MatIconModule} from '@angular/material/icon';
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import {MatProgressSpinnerModule} from '@angular/material/progress-spinner';
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import {MatSnackBar, MatSnackBarModule} from '@angular/material/snack-bar';
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import {MatDividerModule} from '@angular/material/divider';
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import {MatTooltipModule} from '@angular/material/tooltip';
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import {MatMenuModule} from '@angular/material/menu';
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import {MatTableModule} from '@angular/material/table';
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import {MatSortModule} from '@angular/material/sort';
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import {MatFormFieldModule} from "@angular/material/form-field";
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import {MatInputModule} from "@angular/material/input";
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import {DetailsComponent} from "../details/details.component";
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import { Component, inject, OnDestroy, OnInit } from '@angular/core';
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import { CommonModule } from '@angular/common';
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import {
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BehaviorSubject,
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catchError,
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combineLatest,
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debounceTime,
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distinctUntilChanged,
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map,
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Observable,
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of,
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retry,
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Subject,
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takeUntil,
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startWith
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} from 'rxjs';
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import { HttpErrorResponse } from '@angular/common/http';
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import { ComponentType } from '@angular/cdk/portal';
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import { Qualification } from '../Qualification';
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import QualificationService from '../../services/qualification.service';
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import { CreateComponent } from '../create/create.component';
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import { EditComponent } from '../edit/edit.component';
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import { DeleteComponent } from '../delete/delete.component';
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import { DetailsComponent } from '../details/details.component';
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import { MatDialog, MatDialogRef } from '@angular/material/dialog';
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import { MatSnackBar, MatSnackBarConfig, MatSnackBarModule } from '@angular/material/snack-bar';
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import { MatCardModule } from '@angular/material/card';
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import { MatButtonModule } from '@angular/material/button';
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import { MatIconModule } from '@angular/material/icon';
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import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
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import { MatDividerModule } from '@angular/material/divider';
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import { MatTooltipModule } from '@angular/material/tooltip';
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import { MatMenuModule } from '@angular/material/menu';
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import { MatTableModule } from '@angular/material/table';
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import { MatSortModule } from '@angular/material/sort';
|
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import { MatFormFieldModule } from '@angular/material/form-field';
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import { MatInputModule } from '@angular/material/input';
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class SearchEngine {
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static readonly DEBOUNCE_TIME = 300;
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constructor(
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private readonly items: Qualification[],
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private readonly searchTerm: string
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) {}
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execute(): Qualification[] {
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if (!this.searchTerm?.trim()) {
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return this.items;
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}
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const normalizedTerm = this.searchTerm.toLowerCase().trim();
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return this.items.filter(item =>
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item.skill?.toLowerCase().includes(normalizedTerm)
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);
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}
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}
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class ErrorHandler {
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private readonly config: MatSnackBarConfig = {
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duration: 5000,
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horizontalPosition: 'end',
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verticalPosition: 'bottom',
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panelClass: ['error-snackbar']
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};
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constructor(private readonly snackBar: MatSnackBar) {}
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handleHttpError(error: HttpErrorResponse): Observable<never[]> {
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console.error('API Error:', error);
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this.showError('Failed to load qualifications. Please try again.');
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return of([]);
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}
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showError(message: string): void {
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this.snackBar.open(message, 'Close', this.config);
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}
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}
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||||
|
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class DialogManager {
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constructor(
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private readonly dialog: MatDialog,
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private readonly errorHandler: ErrorHandler
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) {}
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|
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openDialog<T>(
|
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component: ComponentType<any>,
|
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data?: T
|
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): MatDialogRef<any, boolean> {
|
||||
return this.dialog.open(component, { data });
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}
|
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}
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||||
|
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interface QualificationState {
|
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items: Qualification[];
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filteredItems: Qualification[];
|
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searchTerm: string;
|
||||
isLoading: boolean;
|
||||
isSearching: boolean;
|
||||
error: string | null;
|
||||
}
|
||||
|
||||
class QualificationStore {
|
||||
private readonly initialState: QualificationState = {
|
||||
items: [],
|
||||
filteredItems: [],
|
||||
searchTerm: '',
|
||||
isLoading: false,
|
||||
isSearching: false,
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||||
error: null
|
||||
};
|
||||
|
||||
private readonly state = new BehaviorSubject<QualificationState>(this.initialState);
|
||||
private readonly searchTerm$ = new Subject<string>();
|
||||
|
||||
readonly items$ = this.state.pipe(map(state => state.filteredItems));
|
||||
readonly isLoading$ = this.state.pipe(map(state => state.isLoading));
|
||||
readonly isSearching$ = this.state.pipe(map(state => state.isSearching));
|
||||
readonly error$ = this.state.pipe(map(state => state.error));
|
||||
|
||||
constructor(
|
||||
private readonly api: QualificationService,
|
||||
private readonly errorHandler: ErrorHandler
|
||||
) {
|
||||
this.setupSearch();
|
||||
}
|
||||
|
||||
private setupSearch(): void {
|
||||
this.searchTerm$.pipe(
|
||||
startWith(''),
|
||||
debounceTime(SearchEngine.DEBOUNCE_TIME),
|
||||
distinctUntilChanged()
|
||||
).subscribe(term => {
|
||||
this.state.next({
|
||||
...this.state.value,
|
||||
isSearching: true,
|
||||
searchTerm: term
|
||||
});
|
||||
|
||||
const currentState = this.state.value;
|
||||
const engine = new SearchEngine(currentState.items, term);
|
||||
const filteredItems = engine.execute();
|
||||
|
||||
setTimeout(() => {
|
||||
this.state.next({
|
||||
...currentState,
|
||||
searchTerm: term,
|
||||
filteredItems,
|
||||
isSearching: false
|
||||
});
|
||||
}, 150);
|
||||
});
|
||||
}
|
||||
|
||||
load(): void {
|
||||
this.setLoading(true);
|
||||
this.api.getAll().pipe(
|
||||
retry(3),
|
||||
catchError(error => this.errorHandler.handleHttpError(error))
|
||||
).subscribe(items => {
|
||||
const engine = new SearchEngine(items, this.state.value.searchTerm);
|
||||
this.state.next({
|
||||
...this.state.value,
|
||||
items,
|
||||
filteredItems: engine.execute(),
|
||||
isLoading: false,
|
||||
error: null
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
search(term: string): void {
|
||||
this.searchTerm$.next(term);
|
||||
}
|
||||
|
||||
private setLoading(isLoading: boolean): void {
|
||||
this.state.next({ ...this.state.value, isLoading });
|
||||
}
|
||||
|
||||
complete(): void {
|
||||
this.state.complete();
|
||||
this.searchTerm$.complete();
|
||||
}
|
||||
}
|
||||
|
||||
@Component({
|
||||
selector: 'app-qualifications',
|
||||
@ -38,114 +200,73 @@ import {DetailsComponent} from "../details/details.component";
|
||||
MatTableModule,
|
||||
MatSortModule,
|
||||
MatFormFieldModule,
|
||||
MatInputModule,
|
||||
MatInputModule
|
||||
],
|
||||
templateUrl: './table.component.html',
|
||||
styleUrl: './table.component.css'
|
||||
})
|
||||
export class QualificationsComponent implements OnInit {
|
||||
private readonly qualificationService: QualificationService = inject(QualificationService);
|
||||
private readonly snackBar: MatSnackBar = inject(MatSnackBar);
|
||||
private readonly dialog: MatDialog = inject(MatDialog);
|
||||
export class QualificationsComponent implements OnInit, OnDestroy {
|
||||
private readonly errorHandler = new ErrorHandler(inject(MatSnackBar));
|
||||
private readonly dialogManager = new DialogManager(
|
||||
inject(MatDialog),
|
||||
this.errorHandler
|
||||
);
|
||||
private readonly store = new QualificationStore(
|
||||
inject(QualificationService),
|
||||
this.errorHandler
|
||||
);
|
||||
|
||||
private static readonly MAX_RETRIES = 3;
|
||||
|
||||
private allQualifications: Qualification[] = [];
|
||||
private searchSubject = new Subject<string>();
|
||||
public qualifications$: Observable<Qualification[]> = of([]);
|
||||
public isSearching = false;
|
||||
public readonly displayedColumns: string[] = ['skill', 'actions'];
|
||||
private readonly destroy$ = new Subject<void>();
|
||||
|
||||
ngOnInit() {
|
||||
protected readonly qualifications$ = this.store.items$;
|
||||
protected readonly isLoading$ = this.store.isLoading$;
|
||||
protected readonly isSearching$ = this.store.isSearching$;
|
||||
protected readonly error$ = this.store.error$;
|
||||
protected readonly displayedColumns = ['skill', 'actions'] as const;
|
||||
|
||||
ngOnInit(): void {
|
||||
this.loadQualifications();
|
||||
this.setupSearch();
|
||||
}
|
||||
|
||||
ngOnDestroy(): void {
|
||||
this.destroy$.next();
|
||||
this.destroy$.complete();
|
||||
this.store.complete();
|
||||
}
|
||||
|
||||
protected onSearch(event: Event): void {
|
||||
const searchInput = event.target as HTMLInputElement;
|
||||
this.store.search(searchInput.value);
|
||||
}
|
||||
|
||||
protected createQualification(): void {
|
||||
this.openModalAndReload(CreateComponent);
|
||||
}
|
||||
|
||||
protected editQualification(qualification: Qualification): void {
|
||||
this.openModalAndReload(EditComponent, qualification);
|
||||
}
|
||||
|
||||
protected deleteQualification(id: number): void {
|
||||
this.openModalAndReload(DeleteComponent, id);
|
||||
}
|
||||
|
||||
protected viewQualificationDetails(qualification: Qualification): void {
|
||||
this.dialogManager.openDialog(DetailsComponent, qualification);
|
||||
}
|
||||
|
||||
private loadQualifications(): void {
|
||||
this.fetchQualifications().subscribe(qualifications => {
|
||||
this.allQualifications = qualifications;
|
||||
this.qualifications$ = of(qualifications);
|
||||
});
|
||||
this.store.load();
|
||||
}
|
||||
|
||||
private setupSearch(): void {
|
||||
this.searchSubject.pipe(
|
||||
debounceTime(300),
|
||||
distinctUntilChanged()
|
||||
).subscribe(searchTerm => {
|
||||
this.isSearching = true;
|
||||
setTimeout(() => {
|
||||
const filteredQualifications = this.allQualifications.filter(qualification =>
|
||||
qualification.skill?.toLowerCase().includes(searchTerm)
|
||||
);
|
||||
this.qualifications$ = of(filteredQualifications);
|
||||
this.isSearching = false;
|
||||
}, 150);
|
||||
});
|
||||
private openModalAndReload<T>(component: ComponentType<any>, data?: T): void {
|
||||
const dialogRef = this.dialogManager.openDialog(component, data);
|
||||
dialogRef.afterClosed()
|
||||
.pipe(takeUntil(this.destroy$))
|
||||
.subscribe(success => {
|
||||
if (success === true) {
|
||||
this.loadQualifications();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private fetchQualifications(): Observable<Qualification[]> {
|
||||
return this.qualificationService.getAll().pipe(
|
||||
retry(QualificationsComponent.MAX_RETRIES),
|
||||
catchError((error: HttpErrorResponse) => {
|
||||
console.error('Error fetching qualifications:', error);
|
||||
this.showErrorMessage('Failed to load qualifications. Please try again.');
|
||||
return of([]);
|
||||
})
|
||||
);
|
||||
}
|
||||
|
||||
private showErrorMessage(message: string): void {
|
||||
this.snackBar.open(message, 'Close', {
|
||||
duration: 5000,
|
||||
horizontalPosition: 'end',
|
||||
verticalPosition: 'bottom',
|
||||
panelClass: ['!bg-red-50', '!text-red-900', '!border', '!border-red-100']
|
||||
});
|
||||
}
|
||||
|
||||
protected filterQualifications(event: Event): void {
|
||||
const searchTerm = (event.target as HTMLInputElement).value.toLowerCase();
|
||||
this.searchSubject.next(searchTerm);
|
||||
}
|
||||
|
||||
openCreateModal() {
|
||||
const dialogRef = this.dialog.open(CreateComponent);
|
||||
|
||||
dialogRef.afterClosed().subscribe((success: boolean) => {
|
||||
if (success) {
|
||||
this.loadQualifications();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
openEditModal(qualification: Qualification) {
|
||||
const dialogRef = this.dialog.open(EditComponent, {
|
||||
data: qualification
|
||||
});
|
||||
|
||||
dialogRef.afterClosed().subscribe((success: boolean) => {
|
||||
if (success) {
|
||||
this.loadQualifications();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
openDeleteModal(id: number) {
|
||||
const dialogRef = this.dialog.open(DeleteComponent, {
|
||||
data: id
|
||||
});
|
||||
|
||||
dialogRef.afterClosed().subscribe((success: boolean) => {
|
||||
if (success) {
|
||||
this.loadQualifications();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
openDetailsModal(qualification: Qualification) {
|
||||
this.dialog.open(DetailsComponent, {
|
||||
data: qualification
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user