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<?php |
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/** |
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* Work out shipping rate from a pre-defined table of regions - to - weights and dimensions. |
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* |
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* @package silvershop-shipping |
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*/ |
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class TableShippingMethod extends ShippingMethod |
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{ |
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private static $defaults = array( |
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'Name' => 'Table Shipping', |
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'Description' => 'Works out shipping from a pre-defined table' |
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); |
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private static $has_many = array( |
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"Rates" => "TableShippingRate" |
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); |
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public function getCMSFields() |
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{ |
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$fields = parent::getCMSFields(); |
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$fieldList = array( |
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"Country" => "Country", |
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"State" => "State", |
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"City" => "City", |
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"PostalCode" => "PostCode", |
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"WeightMin" => "WeightMin", |
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"WeightMax" => "WeightMax", |
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"VolumeMin" => "VolumeMin", |
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"VolumeMax" => "VolumeMax", |
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"ValueMin" => "ValueMin", |
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"ValueMax" => "ValueMax", |
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"QuantityMin" => "QuantityMin", |
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"QuantityMax" => "QuantityMax", |
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"Rate" => "Rate" |
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); |
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$fields->fieldByName('Root')->removeByName("Rates"); |
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if ($this->isInDB()) { |
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$tablefield = new GridField("Rates", "TableShippingRate", $this->Rates(), new GridFieldConfig_RecordEditor()); |
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$fields->addFieldToTab("Root.Main", $tablefield); |
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} |
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return $fields; |
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} |
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/** |
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* Find the appropriate shipping rate from stored table range metrics |
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*/ |
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public function calculateRate(ShippingPackage $package, Address $address) |
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{ |
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$rate = null; |
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$packageconstraints = array( |
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"Weight" => 'weight', |
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"Volume" => 'volume', |
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"Value" => 'value', |
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"Quantity" => 'quantity' |
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); |
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$constraintfilters = array(); |
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$emptyconstraint = array(); |
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foreach ($packageconstraints as $db => $pakval) { |
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$mincol = "\"TableShippingRate\".\"{$db}Min\""; |
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$maxcol = "\"TableShippingRate\".\"{$db}Max\""; |
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//constrain to rates with valid constraints |
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$constraintfilters[] = |
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"(" . |
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"$mincol >= 0" . |
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" AND $mincol <= " . $package->{$pakval}() . |
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" AND $maxcol > 0" . //ignore constraints with maxvalue = 0 |
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" AND $maxcol >= " . $package->{$pakval}() . |
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" AND $mincol < $maxcol" . //sanity check |
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")"; |
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//also include a special case where all constraints are empty |
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$emptyconstraint[] = "($mincol = 0 AND $maxcol = 0)"; |
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} |
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$constraintfilters[] = "(" . implode(" AND ", $emptyconstraint) . ")"; |
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$filter = "(" . implode(") AND (", array( |
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"\"ShippingMethodID\" = " . $this->ID, |
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RegionRestriction::address_filter($address), //address restriction |
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implode(" OR ", $constraintfilters) //metrics restriction |
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)) . ")"; |
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if ($tr = DataObject::get_one("TableShippingRate", $filter, true, "LENGTH(\"RegionRestriction\".\"PostalCode\") DESC, Rate ASC")) { |
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$rate = $tr->Rate; |
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} |
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$this->CalculatedRate = $rate; |
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return $rate; |
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} |
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/** |
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* If this shipping method has any @TableShippingRate with any @RegionRestriction where either Country, State, City or PostalCode are submitted, this method returns true |
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* Else it returns false (@ShippingMethod::requiresAddress()); |
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* |
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* @return bool |
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*/ |
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public function requiresAddress() |
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{ |
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if ($this->Rates()->exists()) { |
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$defaults = RegionRestriction::config()->get('defaults'); |
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$filter = []; |
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foreach($defaults as $field => $val){ |
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$filter[$field . ':not'] = $val; |
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} |
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$rates = $this->Rates()->filterAny($filter); |
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if($rates->exists()){ |
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return true; |
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} |
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} |
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return parent::requiresAddress(); |
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} |
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} |
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/** |
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* Adds extra metric ranges to restrict with, rather than just region. |
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*/ |
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class TableShippingRate extends RegionRestriction |
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{ |
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private static $db = array( |
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//constraint values |
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"WeightMin" => "Decimal", |
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"WeightMax" => "Decimal", |
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"VolumeMin" => "Decimal", |
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"VolumeMax" => "Decimal", |
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"ValueMin" => "Currency", |
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"ValueMax" => "Currency", |
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"QuantityMin" => "Int", |
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"QuantityMax" => "Int", |
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"Rate" => "Currency" |
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); |
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private static $has_one = array( |
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"ShippingMethod" => "TableShippingMethod" |
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); |
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private static $summary_fields = array( |
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'Country', |
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'State', |
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'City', |
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'PostalCode', |
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'WeightMin', |
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'WeightMax', |
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'VolumeMin', |
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'VolumeMax', |
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'ValueMin', |
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'ValueMax', |
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'QuantityMin', |
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'QuantityMax', |
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'Rate' |
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); |
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private static $default_sort = "\"Country\" ASC, \"State\" ASC, \"City\" ASC, \"PostalCode\" ASC, \"Rate\" ASC"; |
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156
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157
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public function getCMSFields() |
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158
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{ |
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$fields = parent::getCMSFields(); |
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$fields->removeByName('ShippingMethodID'); |
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return $fields; |
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} |
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} |
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