eiru_pos/src/store/modules/products.js

const state = {
    products: [],
    selectedProduct: null
}

const getters = {
    getProducts (state) {
        return state.products
    },
    getSelectedProduct(state) {
        return state.selectedProduct
    },
    getVariants(state) {
        return !!state.selectedProduct ? state.selectedProduct.variants : []
    }
}

const mutations = {
    pushProducts(state, payload) {
        state.products = [...payload.products]
    },
    setSelectedProduct(state, payload) {
        state.selectedProduct = payload.product
    }
}

const actions = {
    fetchProducts ({ commit }) {
        let pos = new openerp.web.Model('eiru.pos')
        pos.call('get_products').then(response => {
            commit('pushProducts', {
                products: response
            })
        }).fail(error => {
            console.log(error)
        })
    },
    selectProduct({ commit, dispatch }, payload) {
        if (payload.data.variant_count > 1) {
            commit('setSelectedProduct', {
                product: payload.data
            })
        } else {
            dispatch('addToCart', {
                product: payload.data.variants[0]
            })
        }
    },
    selectVariant({ commit, dispatch }, payload) {
        commit('setSelectedProduct', {
            product: null
        })

        dispatch('addToCart', {
            product: payload.data
        })
    }
}

export default {
    state,
    getters,
    mutations,
    actions
}