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<?php
namespace Yajra\DataTables;
use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Query\Expression;
use Illuminate\Support\Str;
use Yajra\DataTables\Utilities\Helper;
class QueryDataTable extends DataTableAbstract
{
/**
* Builder object.
*
* @var \Illuminate\Database\Query\Builder
*/
protected $query;
/**
* Database connection used.
*
* @var \Illuminate\Database\Connection
*/
protected $connection;
/**
* Flag for ordering NULLS LAST option.
*
* @var bool
*/
protected $nullsLast = false;
/**
* Flag to check if query preparation was already done.
*
* @var bool
*/
protected $prepared = false;
/**
* Query callback for custom pagination using limit without offset.
*
* @var callable
*/
protected $limitCallback;
/**
* Flag to skip total records count query.
*
* @var bool
*/
protected $skipTotalRecords = false;
/**
* Flag to keep the select bindings.
*
* @var bool
*/
protected $keepSelectBindings = false;
/**
* Can the DataTable engine be created with these parameters.
*
* @param mixed $source
* @return bool
*/
public static function canCreate($source)
{
return $source instanceof Builder;
}
/**
* @param \Illuminate\Database\Query\Builder $builder
*/
public function __construct(Builder $builder)
{
$this->query = $builder;
$this->request = app('datatables.request');
$this->config = app('datatables.config');
$this->columns = $builder->columns;
$this->connection = $builder->getConnection();
if ($this->config->isDebugging()) {
$this->connection->enableQueryLog();
}
}
/**
* Organizes works.
*
* @param bool $mDataSupport
* @return \Illuminate\Http\JsonResponse
*
* @throws \Exception
*/
public function make($mDataSupport = true)
{
try {
$this->prepareQuery();
$results = $this->results();
$processed = $this->processResults($results, $mDataSupport);
$data = $this->transform($results, $processed);
return $this->render($data);
} catch (\Exception $exception) {
return $this->errorResponse($exception);
}
}
/**
* Perform search using search pane values.
*/
protected function searchPanesSearch()
{
$columns = $this->request->get('searchPanes', []);
foreach ($columns as $column => $values) {
if ($this->isBlacklisted($column)) {
continue;
}
if ($this->searchPanes[$column] && $callback = $this->searchPanes[$column]['builder']) {
$callback($this->query, $values);
} else {
$this->query->whereIn($column, $values);
}
$this->isFilterApplied = true;
}
}
/**
* Prepare query by executing count, filter, order and paginate.
*/
protected function prepareQuery()
{
if (! $this->prepared) {
$this->totalRecords = $this->totalCount();
if ($this->totalRecords) {
$this->filterRecords();
}
$this->ordering();
$this->paginate();
}
$this->prepared = true;
}
/**
* Skip total records and set the recordsTotal equals to recordsFiltered.
* This will improve the performance by skipping the total count query.
*
* @return $this
*/
public function skipTotalRecords()
{
$this->skipTotalRecords = true;
return $this;
}
/**
* Keep the select bindings.
*
* @return $this
*/
public function keepSelectBindings()
{
$this->keepSelectBindings = true;
return $this;
}
/**
* Count total items.
*
* @return int
*/
public function totalCount()
{
if ($this->skipTotalRecords) {
$this->isFilterApplied = true;
return 1;
}
return $this->totalRecords ? $this->totalRecords : $this->count();
}
/**
* Count filtered items.
*
* @return int
*/
protected function filteredCount()
{
$this->filteredRecords = $this->filteredRecords ?: $this->count();
if ($this->skipTotalRecords) {
$this->totalRecords = $this->filteredRecords;
}
return $this->filteredRecords;
}
/**
* Counts current query.
*
* @return int
*/
public function count()
{
return $this->prepareCountQuery()->count();
}
/**
* Prepare count query builder.
*
* @return \Illuminate\Database\Eloquent\Builder|\Illuminate\Database\Query\Builder
*/
public function prepareCountQuery()
{
$builder = clone $this->query;
if ($this->isComplexQuery($builder)) {
$table = $this->connection->raw('('.$builder->toSql().') count_row_table');
return $this->connection->table($table)
->setBindings($builder->getBindings());
}
$row_count = $this->wrap('row_count');
$builder->select($this->connection->raw("'1' as {$row_count}"));
if (! $this->keepSelectBindings) {
$builder->setBindings([], 'select');
}
return $builder;
}
/**
* Check if builder query uses complex sql.
*
* @param \Illuminate\Database\Query\Builder $builder
* @return bool
*/
protected function isComplexQuery($builder)
{
return Str::contains(Str::lower($builder->toSql()), ['union', 'having', 'distinct', 'order by', 'group by']);
}
/**
* Wrap column with DB grammar.
*
* @param string $column
* @return string
*/
protected function wrap($column)
{
return $this->connection->getQueryGrammar()->wrap($column);
}
/**
* Get paginated results.
*
* @return \Illuminate\Support\Collection
*/
public function results()
{
return $this->query->get();
}
/**
* Get filtered, ordered and paginated query.
*
* @return \Illuminate\Database\Eloquent\Builder|\Illuminate\Database\Query\Builder
*/
public function getFilteredQuery()
{
$this->prepareQuery();
return $this->getQuery();
}
/**
* Get query builder instance.
*
* @return \Illuminate\Database\Eloquent\Builder|\Illuminate\Database\Query\Builder
*/
public function getQuery()
{
return $this->query;
}
/**
* Perform column search.
*
* @return void
*/
public function columnSearch()
{
$columns = $this->request->columns();
foreach ($columns as $index => $column) {
$column = $this->getColumnName($index);
if (! $this->request->isColumnSearchable($index) || $this->isBlacklisted($column) && ! $this->hasFilterColumn($column)) {
continue;
}
if ($this->hasFilterColumn($column)) {
$keyword = $this->getColumnSearchKeyword($index, true);
$this->applyFilterColumn($this->getBaseQueryBuilder(), $column, $keyword);
} else {
$column = $this->resolveRelationColumn($column);
$keyword = $this->getColumnSearchKeyword($index);
$this->compileColumnSearch($index, $column, $keyword);
}
$this->isFilterApplied = true;
}
}
/**
* Check if column has custom filter handler.
*
* @param string $columnName
* @return bool
*/
public function hasFilterColumn($columnName)
{
return isset($this->columnDef['filter'][$columnName]);
}
/**
* Get column keyword to use for search.
*
* @param int $i
* @param bool $raw
* @return string
*/
protected function getColumnSearchKeyword($i, $raw = false)
{
$keyword = $this->request->columnKeyword($i);
if ($raw || $this->request->isRegex($i)) {
return $keyword;
}
return $this->setupKeyword($keyword);
}
/**
* Apply filterColumn api search.
*
* @param mixed $query
* @param string $columnName
* @param string $keyword
* @param string $boolean
*/
protected function applyFilterColumn($query, $columnName, $keyword, $boolean = 'and')
{
$query = $this->getBaseQueryBuilder($query);
$callback = $this->columnDef['filter'][$columnName]['method'];
if ($this->query instanceof EloquentBuilder) {
$builder = $this->query->newModelInstance()->newQuery();
} else {
$builder = $this->query->newQuery();
}
$callback($builder, $keyword);
$query->addNestedWhereQuery($this->getBaseQueryBuilder($builder), $boolean);
}
/**
* Get the base query builder instance.
*
* @param mixed $instance
* @return \Illuminate\Database\Query\Builder
*/
protected function getBaseQueryBuilder($instance = null)
{
if (! $instance) {
$instance = $this->query;
}
if ($instance instanceof EloquentBuilder) {
return $instance->getQuery();
}
return $instance;
}
/**
* Resolve the proper column name be used.
*
* @param string $column
* @return string
*/
protected function resolveRelationColumn($column)
{
return $column;
}
/**
* Compile queries for column search.
*
* @param int $i
* @param string $column
* @param string $keyword
*/
protected function compileColumnSearch($i, $column, $keyword)
{
if ($this->request->isRegex($i)) {
$this->regexColumnSearch($column, $keyword);
} else {
$this->compileQuerySearch($this->query, $column, $keyword, '');
}
}
/**
* Compile regex query column search.
*
* @param mixed $column
* @param string $keyword
*/
protected function regexColumnSearch($column, $keyword)
{
$column = $this->wrap($column);
switch ($this->connection->getDriverName()) {
case 'oracle':
$sql = ! $this->config->isCaseInsensitive()
? 'REGEXP_LIKE( ' . $column . ' , ? )'
: 'REGEXP_LIKE( LOWER(' . $column . ') , ?, \'i\' )';
break;
case 'pgsql':
$column = $this->castColumn($column);
$sql = ! $this->config->isCaseInsensitive() ? $column . ' ~ ?' : $column . ' ~* ? ';
break;
default:
$sql = ! $this->config->isCaseInsensitive()
? $column . ' REGEXP ?'
: 'LOWER(' . $column . ') REGEXP ?';
$keyword = Str::lower($keyword);
}
$this->query->whereRaw($sql, [$keyword]);
}
/**
* Wrap a column and cast based on database driver.
*
* @param string $column
* @return string
*/
protected function castColumn($column)
{
switch ($this->connection->getDriverName()) {
case 'pgsql':
return 'CAST(' . $column . ' as TEXT)';
case 'firebird':
return 'CAST(' . $column . ' as VARCHAR(255))';
default:
return $column;
}
}
/**
* Compile query builder where clause depending on configurations.
*
* @param mixed $query
* @param string $column
* @param string $keyword
* @param string $boolean
*/
protected function compileQuerySearch($query, $column, $keyword, $boolean = 'or')
{
$column = $this->addTablePrefix($query, $column);
$column = $this->castColumn($column);
$sql = $column . ' LIKE ?';
if ($this->config->isCaseInsensitive()) {
$sql = 'LOWER(' . $column . ') LIKE ?';
}
$query->{$boolean . 'WhereRaw'}($sql, [$this->prepareKeyword($keyword)]);
}
/**
* Patch for fix about ambiguous field.
* Ambiguous field error will appear when query use join table and search with keyword.
*
* @param mixed $query
* @param string $column
* @return string
*/
protected function addTablePrefix($query, $column)
{
if (strpos($column, '.') === false) {
$q = $this->getBaseQueryBuilder($query);
if (! $q->from instanceof Expression) {
$column = $q->from . '.' . $column;
}
}
return $this->wrap($column);
}
/**
* Prepare search keyword based on configurations.
*
* @param string $keyword
* @return string
*/
protected function prepareKeyword($keyword)
{
if ($this->config->isStartsWithSearch()) {
return "$keyword%";
}
if ($this->config->isCaseInsensitive()) {
$keyword = Str::lower($keyword);
}
if ($this->config->isWildcard()) {
$keyword = Helper::wildcardLikeString($keyword);
}
if ($this->config->isSmartSearch()) {
$keyword = "%$keyword%";
}
return $keyword;
}
/**
* Add custom filter handler for the give column.
*
* @param string $column
* @param callable $callback
* @return $this
*/
public function filterColumn($column, callable $callback)
{
$this->columnDef['filter'][$column] = ['method' => $callback];
return $this;
}
/**
* Order each given columns versus the given custom sql.
*
* @param array $columns
* @param string $sql
* @param array $bindings
* @return $this
*/
public function orderColumns(array $columns, $sql, $bindings = [])
{
foreach ($columns as $column) {
$this->orderColumn($column, str_replace(':column', $column, $sql), $bindings);
}
return $this;
}
/**
* Override default column ordering.
*
* @param string $column
* @param string|\Closure $sql
* @param array $bindings
* @return $this
*
* @internal string $1 Special variable that returns the requested order direction of the column.
*/
public function orderColumn($column, $sql, $bindings = [])
{
$this->columnDef['order'][$column] = compact('sql', 'bindings');
return $this;
}
/**
* Set datatables to do ordering with NULLS LAST option.
*
* @return $this
*/
public function orderByNullsLast()
{
$this->nullsLast = true;
return $this;
}
/**
* Paginate dataTable using limit without offset
* with additional where clause via callback.
*
* @param callable $callback
* @return $this
*/
public function limit(callable $callback)
{
$this->limitCallback = $callback;
return $this;
}
/**
* Perform pagination.
*
* @return void
*/
public function paging()
{
$limit = (int) $this->request->input('length') > 0 ? $this->request->input('length') : 10;
if (is_callable($this->limitCallback)) {
$this->query->limit($limit);
call_user_func_array($this->limitCallback, [$this->query]);
} else {
$this->query->skip($this->request->input('start'))->take($limit);
}
}
/**
* Add column in collection.
*
* @param string $name
* @param string|callable $content
* @param bool|int $order
* @return $this
*/
public function addColumn($name, $content, $order = false)
{
$this->pushToBlacklist($name);
return parent::addColumn($name, $content, $order);
}
/**
* Resolve callback parameter instance.
*
* @return \Illuminate\Database\Query\Builder
*/
protected function resolveCallbackParameter()
{
return $this->query;
}
/**
* Perform default query orderBy clause.
*/
protected function defaultOrdering()
{
collect($this->request->orderableColumns())
->map(function ($orderable) {
$orderable['name'] = $this->getColumnName($orderable['column'], null, true);
return $orderable;
})
->reject(function ($orderable) {
return $this->isBlacklisted($orderable['name']) && ! $this->hasOrderColumn($orderable['name']);
})
->each(function ($orderable) {
$column = $this->resolveRelationColumn($orderable['name']);
if ($this->hasOrderColumn($column)) {
$this->applyOrderColumn($column, $orderable);
} else {
$nullsLastSql = $this->getNullsLastSql($column, $orderable['direction']);
$normalSql = $this->wrap($column) . ' ' . $orderable['direction'];
$sql = $this->nullsLast ? $nullsLastSql : $normalSql;
$this->query->orderByRaw($sql);
}
});
}
/**
* Check if column has custom sort handler.
*
* @param string $column
* @return bool
*/
protected function hasOrderColumn($column)
{
return isset($this->columnDef['order'][$column]);
}
/**
* Apply orderColumn custom query.
*
* @param string $column
* @param array $orderable
*/
protected function applyOrderColumn($column, $orderable)
{
$sql = $this->columnDef['order'][$column]['sql'];
if ($sql === false) {
return;
}
if (is_callable($sql)) {
call_user_func($sql, $this->query, $orderable['direction']);
} else {
$sql = str_replace('$1', $orderable['direction'], $sql);
$bindings = $this->columnDef['order'][$column]['bindings'];
$this->query->orderByRaw($sql, $bindings);
}
}
/**
* Get NULLS LAST SQL.
*
* @param string $column
* @param string $direction
* @return string
*/
protected function getNullsLastSql($column, $direction)
{
$sql = $this->config->get('datatables.nulls_last_sql', '%s %s NULLS LAST');
return str_replace(
[':column', ':direction'],
[$column, $direction],
sprintf($sql, $column, $direction)
);
}
/**
* Perform global search for the given keyword.
*
* @param string $keyword
*/
protected function globalSearch($keyword)
{
$this->query->where(function ($query) use ($keyword) {
collect($this->request->searchableColumnIndex())
->map(function ($index) {
return $this->getColumnName($index);
})
->reject(function ($column) {
return $this->isBlacklisted($column) && ! $this->hasFilterColumn($column);
})
->each(function ($column) use ($keyword, $query) {
if ($this->hasFilterColumn($column)) {
$this->applyFilterColumn($query, $column, $keyword, 'or');
} else {
$this->compileQuerySearch($query, $column, $keyword);
}
$this->isFilterApplied = true;
});
});
}
/**
* Append debug parameters on output.
*
* @param array $output
* @return array
*/
protected function showDebugger(array $output)
{
$query_log = $this->connection->getQueryLog();
array_walk_recursive($query_log, function (&$item) {
if (is_string($item)) {
$item = utf8_encode($item);
}
});
$output['queries'] = $query_log;
$output['input'] = $this->request->all();
return $output;
}
/**
* Attach custom with meta on response.
*
* @param array $data
* @return array
*/
protected function attachAppends(array $data)
{
$appends = [];
foreach ($this->appends as $key => $value) {
if (is_callable($value)) {
$appends[$key] = value($value($this->getFilteredQuery()));
} else {
$appends[$key] = $value;
}
}
return array_merge($data, $appends);
}
}