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✏️ Editing: TableSelect.php

<?php

namespace Filament\Forms\Components;

use Closure;
use Exception;
use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\HasOne;
use Illuminate\Database\Eloquent\Relations\HasOneOrMany;
use Illuminate\Database\Eloquent\Relations\HasOneOrManyThrough;
use Illuminate\Support\Arr;
use Znck\Eloquent\Relations\BelongsToThrough;

class TableSelect extends Field
{
    use Concerns\CanLimitItemsLength;
    use Concerns\HasPivotData;

/**
     * @var view-string
     */
    protected string $view = 'filament-forms::components.table-select';

protected string | Closure | null $tableConfiguration = null;

protected string | Closure | null $relationship = null;

protected bool | Closure $isMultiple = false;

/**
     * @var array<mixed> | Closure
     */
    protected array | Closure $tableArguments = [];

public function tableConfiguration(string | Closure $tableConfiguration): static
    {
        $this->tableConfiguration = $tableConfiguration;

return $this;
    }

/**
     * @param  array<mixed> | Closure  $arguments
     */
    public function tableArguments(array | Closure $arguments): static
    {
        $this->tableArguments = $arguments;

return $this;
    }

public function getTableConfiguration(): string
    {
        return $this->evaluate($this->tableConfiguration) ?? throw new Exception('The [tableConfiguration()] method must be set when using a [TableSelect] component.');
    }

/**
     * @return array<mixed>
     */
    public function getTableArguments(): array
    {
        return $this->evaluate($this->tableArguments) ?? [];
    }

public function relationship(string | Closure | null $name): static
    {
        $this->relationshipName($name);

$this->loadStateFromRelationshipsUsing(static function (TableSelect $component, $state): void {
            if (filled($state)) {
                return;
            }

$relationship = $component->getRelationship();

if (
                ($relationship instanceof BelongsToMany) ||
                ($relationship instanceof HasOneOrManyThrough)
            ) {
                /** @var Collection $relatedRecords */
                $relatedRecords = $relationship->getResults();

$component->state(
                    // Cast the related keys to a string, otherwise JavaScript does not
                    // know how to handle deselection.
                    //
                    // https://github.com/filamentphp/filament/issues/1111
                    $relatedRecords
                        ->pluck(($relationship instanceof BelongsToMany) ? $relationship->getRelatedKeyName() : $relationship->getRelated()->getKeyName())
                        ->map(static fn ($key): string => strval($key))
                        ->all(),
                );

return;
            }

if ($relationship instanceof BelongsToThrough) {
                /** @var ?Model $relatedModel */
                $relatedModel = $relationship->getResults();

$component->state(
                    $relatedModel?->getAttribute(
                        $relationship->getRelated()->getKeyName(),
                    ),
                );

return;
            }

if ($relationship instanceof HasMany) {
                /** @var Collection $relatedRecords */
                $relatedRecords = $relationship->getResults();

$component->state(
                    $relatedRecords
                        ->pluck($relationship->getLocalKeyName())
                        ->all(),
                );

return;
            }

if ($relationship instanceof HasOne) {
                $relatedModel = $relationship->getResults();

$component->state(
                    $relatedModel?->getAttribute(
                        $relationship->getLocalKeyName(),
                    ),
                );

return;
            }

/** @var BelongsTo $relationship */
            $relatedModel = $relationship->getResults();

$component->state(
                $relatedModel?->getAttribute(
                    $relationship->getOwnerKeyName(),
                ),
            );
        });

$this->saveRelationshipsUsing(static function (TableSelect $component, Model $record, $state): void {
            $relationship = $component->getRelationship();

if (($relationship instanceof HasOne) || ($relationship instanceof HasMany)) {
                $query = $relationship->getQuery();

$query->update([
                    $relationship->getForeignKeyName() => null,
                ]);

if (! empty($state)) {
                    $relationship::noConstraints(function () use ($component, $record, $state): void {
                        $relationship = $component->getRelationship();

$query = $relationship->getQuery()->whereIn($relationship->getLocalKeyName(), Arr::wrap($state));

$query->update([
                            $relationship->getForeignKeyName() => $record->getAttribute($relationship->getLocalKeyName()),
                        ]);
                    });
                }

return;
            }

if (
                ($relationship instanceof HasOneOrMany) ||
                ($relationship instanceof HasOneOrManyThrough) ||
                ($relationship instanceof BelongsToThrough)
            ) {
                return;
            }

if (! $relationship instanceof BelongsToMany) {
                // If the model is new and the foreign key is already filled, we don't need to fill it again.
                // This could be a security issue if the foreign key was mutated in some way before it
                // was saved, and we don't want to overwrite that value.
                if (
                    $record->wasRecentlyCreated &&
                    filled($record->getAttributeValue($relationship->getForeignKeyName()))
                ) {
                    return;
                }

$relationship->associate($state);
                $record->wasRecentlyCreated && $record->save();

return;
            }

/** @var Collection $relatedRecords */
            $relatedRecords = $relationship->getResults();

$state = Arr::wrap($state ?? []);

$recordsToDetach = array_diff(
                $relatedRecords
                    ->pluck($relationship->getRelatedKeyName())
                    ->map(static fn ($key): string => strval($key))
                    ->all(),
                $state,
            );

if (count($recordsToDetach) > 0) {
                $relationship->detach($recordsToDetach);
            }

$pivotData = $component->getPivotData();

if ($pivotData === []) {
                $relationship->sync($state, detaching: false);

return;
            }

$relationship->syncWithPivotValues($state, $pivotData, detaching: false);
        });

$this->dehydrated(fn (TableSelect $component): bool => ! $component->isMultiple());

return $this;
    }

public function relationshipName(string | Closure | null $name): static
    {
        $this->relationship = $name;

return $this;
    }

public function getRelationship(): BelongsTo | BelongsToMany | HasOneOrMany | HasOneOrManyThrough | BelongsToThrough | null
    {
        if (! $this->hasRelationship()) {
            return null;
        }

$record = $this->getModelInstance();

$relationship = null;

$relationshipName = $this->getRelationshipName();

foreach (explode('.', $relationshipName) as $nestedRelationshipName) {
            if (! $record->isRelation($nestedRelationshipName)) {
                $relationship = null;

break;
            }

$relationship = $record->{$nestedRelationshipName}();
            $record = $relationship->getRelated();
        }

if (! $relationship) {
            throw new Exception("The relationship [{$relationshipName}] does not exist on the model [{$this->getModel()}].");
        }

return $relationship;
    }

public function getRelationshipName(): ?string
    {
        return $this->evaluate($this->relationship);
    }

public function hasRelationship(): bool
    {
        return filled($this->getRelationshipName());
    }

public function getLabel(): string | Htmlable | null
    {
        if ($this->label === null && $this->hasRelationship()) {
            $label = (string) str($this->getRelationshipName())
                ->before('.')
                ->kebab()
                ->replace(['-', '_'], ' ')
                ->ucfirst();

return ($this->shouldTranslateLabel) ? __($label) : $label;
        }

return parent::getLabel();
    }

public function multiple(bool | Closure $condition = true): static
    {
        $this->isMultiple = $condition;

return $this;
    }

public function isMultiple(): bool
    {
        return (bool) $this->evaluate($this->isMultiple);
    }
}

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