JoinsTrait::getRelationJoin() - Code Metrics - Inspection of "Code reformatting" - blasttech/eloquent-related-plus - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Push — master ( 479ccf...5dcb31 )

by Michael
created 2018-02-08 03:51 UTC
JoinsTrait::getRelationJoin() A

↳ Parent: JoinsTrait
Complexity

Conditions	3
Paths	2
Size

Total Lines	8
Code Lines	3
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	3
eloc	3
nc	2
nop	5
dl	0
loc	8
rs	9.4285
c	0
b	0
f	0
<?php

namespace Blasttech\EloquentRelatedPlus;

use DB;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\HasOneOrMany;
use Illuminate\Database\Eloquent\Relations\Relation;
use Illuminate\Database\Query\Expression;
use Illuminate\Database\Query\JoinClause;

/**
 * Trait JoinsTrait
 *
 * @property array order_fields
 * @property array order_defaults
 * @property array order_relations
 * @property array order_with
 * @property array search_fields
 * @property string connection
 */
trait JoinsTrait
{
    use HelperMethodTrait;

    /**
     * Check relation type and get join
     *
     * @param Relation $relation
     * @param JoinClause $join
     * @param \stdClass $table
     * @param string $operator
     * @param string|null $direction
     * @return Builder|JoinClause
     */
    protected function getRelationJoin($relation, $join, $table, $operator, $direction = null)
    {
        // If a HasOne relation and ordered - ie join to the latest/earliest
        if (class_basename($relation) === 'HasOne' && !empty($relation->toBase()->orders)) {
            return $this->hasOneJoin($relation, $join);
        }

        return $this->hasManyJoin($relation, $join, $table, $operator, $direction);
    }

    /**
     * Join a HasOne relation which is ordered
     *
     * @param Relation $relation
     * @param JoinClause $join
     * @return JoinClause
     */
    protected function hasOneJoin($relation, $join)
    {
        // Get first relation order (should only be one)
        $order = $relation->toBase()->orders[0];

        return $join->on($order['column'], $this->hasOneJoinSql($relation, $order));
    }

    /**
     * Get join sql for a HasOne relation
     *
     * @param Relation $relation
     * @param array $order
     * @return Expression
     */
    protected function hasOneJoinSql($relation, $order)
    {
        // Build subquery for getting first/last record in related table
        $subQuery = $this
            ->joinOne(
                $relation->getRelated()->newQuery(),
                $relation,
                $order['column'],
                $order['direction']
            )
            ->setBindings($relation->getBindings());

        return DB::raw('(' . $this->toSqlWithBindings($subQuery) . ')');
        return DB::raw('(' . $this->toSqlWithBindings(/** @scrutinizer ignore-type */ $subQuery) . ')');
    }

    /**
     * Adds a where for a relation's join columns and and min/max for a given column
     *
     * @param Builder $query
     * @param Relation $relation
     * @param string $column
     * @param string $direction
     * @return Builder
     */
    protected function joinOne($query, $relation, $column, $direction)
    {
        // Get join fields
        $joinColumns = $this->getJoinColumns($relation);

        return $this->selectMinMax(
            $query->whereColumn($joinColumns->first, '=', $joinColumns->second),
            /** @scrutinizer ignore-type */ $query->whereColumn($joinColumns->first, '=', $joinColumns->second),
            $column,
            $direction
        );
    }

    /**
     * Get the join columns for a relation
     *
     * @param Relation|BelongsTo|HasOneOrMany $relation
     * @return \stdClass
     */
    protected function getJoinColumns($relation)
    {
        // Get keys with table names
        if ($relation instanceof BelongsTo) {
            $first = $relation->getOwnerKey();
            $second = $relation->getForeignKey();
        } else {
            $first = $relation->getQualifiedParentKeyName();
            $second = $relation->getQualifiedForeignKeyName();
        }

        return (object)['first' => $first, 'second' => $second];
    }

    /**
     * Adds a select for a min or max on the given column, depending on direction given
     *
     * @param Builder $query
     * @param string $column
     * @param string $direction
     * @return Builder
     */
    protected function selectMinMax($query, $column, $direction)
    {
        $sql_direction = ($direction == 'asc' ? 'MIN' : 'MAX');

        return $query->select(DB::raw($sql_direction . '(' . $this->addBackticks($column) . ')'));

    }

    /**
     * Join a HasMany Relation
     *
     * @param Relation $relation
     * @param JoinClause $join
     * @param \stdClass $table
     * @param string $operator
     * @param string $direction
     * @return Builder|JoinClause
     */
    protected function hasManyJoin($relation, $join, $table, $operator, $direction)
    {
        // Get relation join columns
        $joinColumns = $this->getJoinColumns($relation);
        $joinColumns = $this->replaceColumnTables($joinColumns, $table);

        $join->on($joinColumns->first, $operator, $joinColumns->second);

        // Add any where clauses from the relationship
        $join = $this->addRelatedWhereConstraints($join, $relation, $table->alias);

        if (!is_null($direction) && get_class($relation) === HasMany::class) {
            $join = $this->hasManyJoinWhere($join, $joinColumns->first, $relation, $table->alias, $direction);
        }

        return $join;
    }

    /**
     * Replace column table names with aliases
     *
     * @param \stdClass $joinColumns
     * @param \stdClass $table
     * @return \stdClass
     */
    protected function replaceColumnTables($joinColumns, $table)
    {
        if ($table->name !== $table->alias) {
            $joinColumns->first = str_replace($table->name, $table->alias, $joinColumns->first);
            $joinColumns->second = str_replace($table->name, $table->alias, $joinColumns->second);
        }

        return $joinColumns;
    }

    /**
     * Add wheres if they exist for a relation
     *
     * @param Builder|JoinClause $builder
     * @param Relation|BelongsTo|HasOneOrMany $relation
     * @param string $table
     * @return Builder|JoinClause $builder
     */
    protected function addRelatedWhereConstraints($builder, $relation, $table)
    {
        // Get where clauses from the relationship
        $wheres = collect($relation->toBase()->wheres)
            ->where('type', 'Basic')
            ->map(function ($where) use ($table) {
                // Add table name to column if it is absent
                return [$this->columnWithTableName($table, $where['column']), $where['operator'], $where['value']];
            })->toArray();

        if (!empty($wheres)) {
            $builder->where($wheres);
        }

        return $builder;
    }

    /**
     * If the relation is one-to-many, just get the first related record
     *
     * @param JoinClause $joinClause
     * @param string $column
     * @param HasMany|Relation $relation
     * @param string $table
     * @param string $direction
     *
     * @return JoinClause
     */
    public function hasManyJoinWhere(JoinClause $joinClause, $column, $relation, $table, $direction)
    {
        return $joinClause->where(
            $column,
            function ($subQuery) use ($table, $direction, $relation, $column) {
                $subQuery = $this->joinOne(
                    $subQuery->from($table),
                    $relation,
                    $column,
                    $direction
                );

                // Add any where statements with the relationship
                $subQuery = $this->addRelatedWhereConstraints($subQuery, $relation, $table);

                // Add any order statements with the relationship
                return $this->addOrder($subQuery, $relation, $table);
            }
        );
    }

    /**
     * Add orderBy if orders exist for a relation
     *
     * @param Builder|JoinClause $builder
     * @param Relation|BelongsTo|HasOneOrMany $relation
     * @param string $table
     * @return Builder|JoinClause $builder
     */
    protected function addOrder($builder, $relation, $table)
    {
        if (!empty($relation->toBase()->orders)) {
            // Get where clauses from the relationship
            foreach ($relation->toBase()->orders as $order) {
                $builder->orderBy($this->columnWithTableName($table, $order['column']), $order['direction']);
            }
        }

        return $builder;
    }
}

blasttech / eloquent-related-plus

Push — master ( 479ccf...5dcb31 )

JoinsTrait::getRelationJoin() A

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