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✏️ Editing: HasCellState.php

<?php

namespace Filament\Support\Concerns;

use Closure;
use Exception;
use Filament\Forms\Components\RichEditor\Models\Contracts\HasRichContent;
use Filament\Support\ArrayRecord;
use Filament\Tables\Columns\Column;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\Relation;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Illuminate\Support\Stringable;
use Znck\Eloquent\Relations\BelongsToThrough;

trait HasCellState
{
    protected mixed $defaultState = null;

protected mixed $getStateUsing = null;

protected string | Closure | null $separator = null;

protected bool | Closure $isDistinctList = false;

protected ?string $inverseRelationshipName = null;

/**
     * @var array<string, mixed>
     */
    protected array $cachedState = [];

public function inverseRelationship(?string $name): static
    {
        $this->inverseRelationshipName = $name;

return $this;
    }

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

return $this;
    }

public function getStateUsing(mixed $callback): static
    {
        $this->getStateUsing = $callback;

return $this;
    }

public function state(mixed $state): static
    {
        $this->getStateUsing($state);

return $this;
    }

public function default(mixed $state): static
    {
        $this->defaultState = $state;

return $this;
    }

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

public function getDefaultState(): mixed
    {
        return $this->evaluate($this->defaultState);
    }

public function getState(): mixed
    {
        return $this->cacheState(function (): mixed {
            $state = ($this->getStateUsing !== null) ?
                $this->evaluate($this->getStateUsing) :
                $this->getStateFromRecord();

if (is_string($state) && ($separator = $this->getSeparator())) {
                $state = explode($separator, $state);
                $state = (count($state) === 1 && blank($state[0])) ?
                    [] :
                    $state;
            }

if (blank($state)) {
                $state = $this->getDefaultState();
            }

return $state;
        });
    }

public function getStateFromRecord(): mixed
    {
        $record = $this->getRecord();
        $name = $this->getName();

if (
            ($record instanceof HasRichContent) &&
            $record->hasRichContentAttribute($name)
        ) {
            $state = $record->getRichContentAttribute($name);
        } else {
            $state = data_get($record, $name);
        }

if ($state !== null) {
            return $state;
        }

if (($this instanceof Column) && is_array($record)) { /** @phpstan-ignore function.impossibleType, booleanAnd.alwaysFalse */
            return null;
        }

if (! $this->hasRelationship($record)) {
            return null;
        }

$relationship = $this->getRelationship($record);

if (! $relationship) {
            return null;
        }

$attributeName = $this->getAttributeName($record);
        $fullAttributeName = $this->getFullAttributeName($record);

$state = collect($this->getRelationshipResults($record))
            ->filter(fn (Model $record): bool => array_key_exists($attributeName, $record->attributesToArray()))
            ->pluck($fullAttributeName)
            ->filter(fn ($state): bool => filled($state))
            ->when($this->isDistinctList(), fn (Collection $state) => $state->unique())
            ->values();

if (! $state->count()) {
            return null;
        }

return $state->all();
    }

public function clearCachedState(): void
    {
        $this->cachedState = [];
    }

public function separator(string | Closure | null $separator = ','): static
    {
        $this->separator = $separator;

return $this;
    }

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

public function hasRelationship(Model $record): bool
    {
        $name = $this->getName();

if (! str($name)->contains('.')) {
            return false;
        }

return $record->isRelation((string) str($name)->before('.'));
    }

/**
     * @deprecated Use `hasRelationship()` instead.
     */
    public function queriesRelationships(Model $record): bool
    {
        return $this->hasRelationship($record);
    }

public function getRelationship(Model $record, ?string $relationshipName = null): ?Relation
    {
        if (isset($relationshipName)) {
            $nameParts = explode('.', $relationshipName);
        } else {
            $name = $this->getName();

if (! str($name)->contains('.')) {
                return null;
            }

$nameParts = explode('.', $name);
            array_pop($nameParts);
        }

$relationship = null;

foreach ($nameParts as $namePart) {
            if (! $record->isRelation($namePart)) {
                break;
            }

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

return $relationship;
    }

/**
     * @param  array<string> | null  $relationships
     * @return array<Model>
     */
    public function getRelationshipResults(Model $record, ?array $relationships = null): array
    {
        $results = [];

$relationships ??= explode('.', $this->getRelationshipName($record));

while (count($relationships)) {
            $currentRelationshipName = array_shift($relationships);

$currentRelationshipValue = $record->getRelationValue($currentRelationshipName);

if ($currentRelationshipValue instanceof Collection) {
                if (! count($relationships)) {
                    $results = [
                        ...$results,
                        ...$currentRelationshipValue->all(),
                    ];

continue;
                }

foreach ($currentRelationshipValue as $valueRecord) {
                    $results = [
                        ...$results,
                        ...$this->getRelationshipResults(
                            $valueRecord,
                            $relationships,
                        ),
                    ];
                }

break;
            }

if (! $currentRelationshipValue instanceof Model) {
                break;
            }

if (! count($relationships)) {
                $results[] = $currentRelationshipValue;

break;
            }

$record = $currentRelationshipValue;
        }

return $results;
    }

public function getAttributeName(Model $record): string
    {
        $name = $this->getName();

if (! str($name)->contains('.')) {
            return $name;
        }

$nameParts = explode('.', $name);

foreach ($nameParts as $namePart) {
            if (! $record->isRelation($namePart)) {
                break;
            }

array_shift($nameParts);
            $record = $record->{$namePart}()->getRelated();
        }

return Arr::first($nameParts);
    }

public function getFullAttributeName(Model $record): string
    {
        $name = $this->getName();

if (! str($name)->contains('.')) {
            return $name;
        }

$nameParts = explode('.', $name);

foreach ($nameParts as $namePart) {
            if (! $record->isRelation($namePart)) {
                break;
            }

array_shift($nameParts);
            $record = $record->{$namePart}()->getRelated();
        }

return implode('.', $nameParts);
    }

public function getInverseRelationshipName(Model $record): string
    {
        if (filled($this->inverseRelationshipName)) {
            return $this->inverseRelationshipName;
        }

$nameParts = explode('.', $this->getName());
        array_pop($nameParts);

$inverseRelationshipParts = [];

foreach ($nameParts as $namePart) {
            if (! $record->isRelation($namePart)) {
                break;
            }

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

$inverseNestedRelationshipName = (string) str(class_basename($relationship->getParent()::class))
                ->when(
                    ($relationship instanceof BelongsTo ||
                        $relationship instanceof BelongsToMany ||
                        $relationship instanceof BelongsToThrough),
                    fn (Stringable $name) => $name->plural(),
                )
                ->camel();

if (! $record->isRelation($inverseNestedRelationshipName)) {
                // The conventional relationship doesn't exist, but we can
                // attempt to use the original relationship name instead.

if (! $record->isRelation($namePart)) {
                    $recordClass = $record::class;

throw new Exception("When trying to guess the inverse relationship for column [{$this->getName()}], relationship [{$inverseNestedRelationshipName}] was not found on model [{$recordClass}]. Please define a custom [inverseRelationship()] for this column.");
                }

$inverseNestedRelationshipName = $namePart;
            }

array_unshift($inverseRelationshipParts, $inverseNestedRelationshipName);
        }

return implode('.', $inverseRelationshipParts);
    }

public function getRelationshipName(Model $record): ?string
    {
        $name = $this->getName();

if (! str($name)->contains('.')) {
            return null;
        }

$nameParts = explode('.', $name);
        array_pop($nameParts);

$relationshipParts = [];

foreach ($nameParts as $namePart) {
            if (! $record->isRelation($namePart)) {
                break;
            }

$relationshipParts[] = $namePart;
            $record = $record->{$namePart}()->getRelated();
        }

return implode('.', $relationshipParts);
    }

protected function cacheState(Closure $state): mixed
    {
        $record = $this->getRecord();

if (! $record) {
            return null;
        }

if ($this instanceof Column) {
            $recordKey = $this->getLivewire()->getTableRecordKey($record);
        } elseif (is_array($record)) { /** @phpstan-ignore function.impossibleType */
            $recordKey = (string) ($record[ArrayRecord::getKeyName()] ?? null); /** @phpstan-ignore nullCoalesce.offset */
        } else {
            $recordKey = (string) $record->getKey();
        }

if (blank($recordKey)) {
            return $state();
        }

if (array_key_exists($recordKey, $this->cachedState)) {
            return $this->cachedState[$recordKey];
        }

return $this->cachedState[$recordKey] = $state();
    }
}

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