3 \4@s6ddlmZddlmZddlmZeddZeddZeddZ eddZ edd Z edd Z ed d d dgZ GdddeZGdddeZGdddeZGdddeZGdddeZGdddeZGdddeZGdddeZGdddeeeeZGd d!d!eeeeZGd"d#d#eeeeZd$S)%) namedtuple)Decimal) get_classzpartner.availability Unavailable Available StockRequiredzpartner.prices FixedPriceTaxInclusiveFixedPrice PurchaseInfoprice availability stockrecordc@seZdZdZdddZdS)SelectoraB Responsible for returning the appropriate strategy class for a given user/session. This can be called in three ways: #) Passing a request and user. This is for determining prices/availability for a normal user browsing the site. #) Passing just the user. This is for offline processes that don't have a request instance but do know which user to determine prices for. #) Passing nothing. This is for offline processes that don't correspond to a specific user. Eg, determining a price to store in a search index. NcKst|S)z; Return an instanticated strategy instance )Default)selfrequestuserkwargsr6/var/www/html/oscar2019/oscar/apps/partner/strategy.pystrategy%szSelector.strategy)NN)__name__ __module__ __qualname____doc__rrrrrrsrc@s6eZdZdZd ddZd ddZddZd d d ZdS)Basea  The base strategy class Given a product, strategies are responsible for returning a ``PurchaseInfo`` instance which contains: - The appropriate stockrecord for this customer - A pricing policy instance - An availability policy instance NcCs$||_d|_|r |jjr |j|_dS)N)rris_authenticated)rrrrr__init__:s z Base.__init__cCs tddS)a Given a product, return a ``PurchaseInfo`` instance. The ``PurchaseInfo`` class is a named tuple with attributes: - ``price``: a pricing policy object. - ``availability``: an availability policy object. - ``stockrecord``: the stockrecord that is being used If a stockrecord is passed, return the appropriate ``PurchaseInfo`` instance for that product and stockrecord is returned. zoA strategy class must define a fetch_for_product method for returning the availability and pricing information.N)NotImplementedError)rproductr rrrfetch_for_product@s zBase.fetch_for_productcCs tddS)zH Given a parent product, fetch a ``StockInfo`` instance znA strategy class must define a fetch_for_parent method for returning the availability and pricing information.N)r)rrrrrfetch_for_parentSszBase.fetch_for_parentcCs |j|jS)a Given a basket line instance, fetch a ``PurchaseInfo`` instance. This method is provided to allow purchase info to be determined using a basket line's attributes. For instance, "bundle" products often use basket line attributes to store SKUs of contained products. For such products, we need to look at the availability of each contained product to determine overall availability. )r r)rliner rrrfetch_for_line]s zBase.fetch_for_line)N)N)N)rrrrrr r!r#rrrrr.s     rc@sReZdZdZdddZddZddZd d Zd d Zd dZ ddZ ddZ dS) Structuredz A strategy class which provides separate, overridable methods for determining the 3 things that a ``PurchaseInfo`` instance requires: #) A stockrecord #) A pricing policy #) An availability policy NcCs0|dkr|j|}t|j|||j|||dS)zz Return the appropriate ``PurchaseInfo`` instance. This method is not intended to be overridden. N)r r r )select_stockrecordr pricing_policyavailability_policy)rrr rrrr vs    zStructured.fetch_for_productcCs(|j|}t|j|||j||ddS)N)r r r )select_children_stockrecordsr parent_pricing_policyparent_availability_policy)rrchildren_stockrrrr!s   zStructured.fetch_for_parentcCs tddS)z4 Select the appropriate stockrecord zEA structured strategy class must define a 'select_stockrecord' methodN)r)rrrrrr%szStructured.select_stockrecordcCs8g}x.|jjddjD]}|j||j|fqW|S)zO Select appropriate stock record for all children of a product T)live)childrenfilterallappendr%)rrrecordschildrrrr(sz'Structured.select_children_stockrecordscCs tddS)z7 Return the appropriate pricing policy zAA structured strategy class must define a 'pricing_policy' methodN)r)rrr rrrr&szStructured.pricing_policycCs tddS)NzHA structured strategy class must define a 'parent_pricing_policy' method)r)rrr+rrrr)sz Structured.parent_pricing_policycCs tddS)z< Return the appropriate availability policy zFA structured strategy class must define a 'availability_policy' methodN)r)rrr rrrr'szStructured.availability_policycCs tddS)NzMA structured strategy class must define a 'parent_availability_policy' method)r)rrr+rrrr*sz%Structured.parent_availability_policy)N) rrrrr r!r%r(r&r)r'r*rrrrr$ls   r$c@seZdZdZddZdS)UseFirstStockRecorda Stockrecord selection mixin for use with the ``Structured`` base strategy. This mixin picks the first (normally only) stockrecord to fulfil a product. This is backwards compatible with Oscar<0.6 where only one stockrecord per product was permitted. c Cs(y|jjdStk r"dSXdS)Nr) stockrecordsr/ IndexError)rrrrrr%sz&UseFirstStockRecord.select_stockrecordN)rrrrr%rrrrr3sr3c@s eZdZdZddZddZdS)rz Availability policy mixin for use with the ``Structured`` base strategy. This mixin ensures that a product can only be bought if it has stock available (if stock is being tracked). cCs(|s tS|jjstSt|jSdS)N)rget_product_class track_stockrStockRequiredAvailabilityZnet_stock_level)rrr rrrr's  z!StockRequired.availability_policycCs0x(|D] \}}|j||}|jrtSqWtS)N)r'is_available_to_buyrr)rrr+r2r policyrrrr*s   z(StockRequired.parent_availability_policyN)rrrrr'r*rrrrrs c@s eZdZdZddZddZdS)NoTaxz Pricing policy mixin for use with the ``Structured`` base strategy. This mixin specifies zero tax and uses the ``price_excl_tax`` from the stockrecord. cCs,| s|jdkrtSt|j|jtddS)Nz0.00)currencyexcl_taxtax)price_excl_taxUnavailablePricerprice_currencyD)rrr rrrr&s zNoTax.pricing_policycCs6dd|D}|stS|d}t|j|jtddS)NcSs g|]}|ddk r|dqS)Nr).0xrrr sz/NoTax.parent_pricing_policy..rz0.00)r<r=r>)r@rrAr?rB)rrr+r4r rrrr)szNoTax.parent_pricing_policyN)rrrrr&r)rrrrr;s r;c@s@eZdZdZedZedZddZddZdd Z d d Z d S) FixedRateTaxa Pricing policy mixin for use with the ``Structured`` base strategy. This mixin applies a fixed rate tax to the base price from the product's stockrecord. The price_incl_tax is quantized to two decimal places. Rounding behaviour is Decimal's default 0z0.01cCsN| s|jdkrtS|j||}|j|}|j|j|}t|j|j|dS)N)r<r=r>)r?r@get_rate get_exponentquantizer rA)rrr rateexponentr>rrrr& s  zFixedRateTax.pricing_policycCsXdd|D}|stS|d}|j||}|j|}|j|j|}t|j|j|dS)NcSs g|]}|ddk r|dqS)rCNr)rDrErrrrFsz6FixedRateTax.parent_pricing_policy..r)r<r=r>)r@rIrJr?rKrrA)rrr+r4r rLrMr>rrrr)s  z"FixedRateTax.parent_pricing_policycCs|jS)z This method serves as hook to be able to plug in support for varying tax rates based on the product. TODO: Needs tests. )rL)rrr rrrrI&szFixedRateTax.get_ratecCs|jS)z This method serves as hook to be able to plug in support for a varying exponent based on the currency. TODO: Needs tests. )rM)rr rrrrJ/szFixedRateTax.get_exponentN) rrrrrBrLrMr&r)rIrJrrrrrGs  rGc@s eZdZdZddZddZdS) DeferredTaxz Pricing policy mixin for use with the ``Structured`` base strategy. This mixin does not specify the product tax and is suitable to territories where tax isn't known until late in the checkout process. cCs&| s|jdkrtSt|j|jdS)N)r<r=)r?r@rrA)rrr rrrr&@s zDeferredTax.pricing_policycCs0dd|D}|stS|d}t|j|jdS)NcSs g|]}|ddk r|dqS)rCNr)rDrErrrrFHsz5DeferredTax.parent_pricing_policy..r)r<r=)r@rrAr?)rrr+r4r rrrr)Gsz!DeferredTax.parent_pricing_policyN)rrrrr&r)rrrrrN9srNc@seZdZdZdS)rz Default stock/price strategy that uses the first found stockrecord for a product, ensures that stock is available (unless the product class indicates that we don't need to track stock) and charges zero tax. N)rrrrrrrrrYsrc@seZdZdZedZdS)UKa Sample strategy for the UK that: - uses the first stockrecord for each product (effectively assuming there is only one). - requires that a product has stock available to be bought - applies a fixed rate of tax on all products This is just a sample strategy used for internal development. It is not recommended to be used in production, especially as the tax rate is hard-coded. z0.20N)rrrrrBrLrrrrrOas rOc@seZdZdZdS)USa Sample strategy for the US. - uses the first stockrecord for each product (effectively assuming there is only one). - requires that a product has stock available to be bought - doesn't apply a tax to product prices (normally this will be done after the shipping address is entered). This is just a sample one used for internal development. It is not recommended to be used in production. N)rrrrrrrrrPrs rPN) collectionsrdecimalrrBoscar.core.loadingrrrr8r@rr r objectrrr$r3rr;rGrNrrOrPrrrrs*         >P8