1
|
|
|
""" |
2
|
|
|
byceps.services.shop.shipping.service |
3
|
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
4
|
|
|
|
5
|
|
|
:Copyright: 2006-2021 Jochen Kupperschmidt |
6
|
|
|
:License: Revised BSD (see `LICENSE` file for details) |
7
|
|
|
""" |
8
|
|
|
|
9
|
1 |
|
from __future__ import annotations |
10
|
1 |
|
from collections import Counter, defaultdict |
11
|
1 |
|
from dataclasses import dataclass |
12
|
1 |
|
from typing import Iterator, Sequence |
13
|
|
|
|
14
|
1 |
|
from ..article.dbmodels.article import Article as DbArticle |
15
|
|
|
|
16
|
1 |
|
from ....database import db |
17
|
|
|
|
18
|
1 |
|
from ..article.transfer.models import ArticleNumber |
19
|
1 |
|
from ..order.dbmodels.line_item import LineItem as DbLineItem |
20
|
1 |
|
from ..order.dbmodels.order import Order as DbOrder |
21
|
1 |
|
from ..order.transfer.models import PaymentState |
22
|
1 |
|
from ..shop.transfer.models import ShopID |
23
|
|
|
|
24
|
1 |
|
from .transfer.models import ArticleToShip |
25
|
|
|
|
26
|
|
|
|
27
|
1 |
|
def get_articles_to_ship(shop_id: ShopID) -> Sequence[ArticleToShip]: |
28
|
|
|
"""Return articles that need, or likely need, to be shipped soon.""" |
29
|
|
|
relevant_order_payment_states = { |
30
|
|
|
PaymentState.open, |
31
|
|
|
PaymentState.paid, |
32
|
|
|
} |
33
|
|
|
|
34
|
|
|
line_item_quantities = list( |
35
|
|
|
_find_line_items(shop_id, relevant_order_payment_states) |
36
|
|
|
) |
37
|
|
|
|
38
|
|
|
article_numbers = {item.article_number for item in line_item_quantities} |
39
|
|
|
article_descriptions = _get_article_descriptions(article_numbers) |
40
|
|
|
|
41
|
|
|
articles_to_ship = list( |
42
|
|
|
_aggregate_ordered_article_quantites( |
43
|
|
|
line_item_quantities, article_descriptions |
44
|
|
|
) |
45
|
|
|
) |
46
|
|
|
|
47
|
|
|
articles_to_ship.sort(key=lambda a: a.article_number) |
48
|
|
|
|
49
|
|
|
return articles_to_ship |
50
|
|
|
|
51
|
|
|
|
52
|
1 |
|
@dataclass(frozen=True) |
53
|
|
|
class LineItemQuantity: |
54
|
1 |
|
article_number: ArticleNumber |
55
|
1 |
|
payment_state: PaymentState |
56
|
1 |
|
quantity: int |
57
|
|
|
|
58
|
|
|
|
59
|
1 |
|
def _find_line_items( |
60
|
|
|
shop_id: ShopID, payment_states: set[PaymentState] |
61
|
|
|
) -> Iterator[LineItemQuantity]: |
62
|
|
|
"""Return article quantities for the given payment states.""" |
63
|
|
|
payment_state_names = {ps.name for ps in payment_states} |
64
|
|
|
|
65
|
|
|
common_query = DbLineItem.query \ |
66
|
|
|
.join(DbOrder) \ |
67
|
|
|
.filter(DbOrder.shop_id == shop_id) \ |
68
|
|
|
.options(db.joinedload(DbLineItem.order)) \ |
69
|
|
|
.filter(DbLineItem.shipping_required == True) |
70
|
|
|
|
71
|
|
|
definitive_line_items = common_query \ |
72
|
|
|
.filter(DbOrder._payment_state == PaymentState.paid.name) \ |
73
|
|
|
.filter(DbOrder.shipped_at == None) \ |
74
|
|
|
.all() |
75
|
|
|
|
76
|
|
|
potential_line_items = common_query \ |
77
|
|
|
.filter(DbOrder._payment_state == PaymentState.open.name) \ |
78
|
|
|
.all() |
79
|
|
|
|
80
|
|
|
line_items = definitive_line_items + potential_line_items |
81
|
|
|
|
82
|
|
|
for item in line_items: |
83
|
|
|
yield LineItemQuantity( |
84
|
|
|
item.article_number, |
85
|
|
|
item.order.payment_state, |
86
|
|
|
item.quantity |
87
|
|
|
) |
88
|
|
|
|
89
|
|
|
|
90
|
1 |
|
def _aggregate_ordered_article_quantites( |
91
|
|
|
line_item_quantities: Sequence[LineItemQuantity], |
92
|
|
|
article_descriptions: dict[ArticleNumber, str], |
93
|
|
|
) -> Iterator[ArticleToShip]: |
94
|
|
|
"""Aggregate article quantities per payment state.""" |
95
|
|
|
d: defaultdict[ArticleNumber, Counter] = defaultdict(Counter) |
96
|
|
|
|
97
|
|
|
for item in line_item_quantities: |
98
|
|
|
d[item.article_number][item.payment_state] += item.quantity |
99
|
|
|
|
100
|
|
|
for article_number, counter in d.items(): |
101
|
|
|
description = article_descriptions[article_number] |
102
|
|
|
quantity_paid = counter[PaymentState.paid] |
103
|
|
|
quantity_open = counter[PaymentState.open] |
104
|
|
|
|
105
|
|
|
yield ArticleToShip( |
106
|
|
|
article_number, |
107
|
|
|
description, |
108
|
|
|
quantity_paid, |
109
|
|
|
quantity_open, |
110
|
|
|
quantity_total=quantity_paid + quantity_open, |
111
|
|
|
) |
112
|
|
|
|
113
|
|
|
|
114
|
1 |
|
def _get_article_descriptions( |
115
|
|
|
article_numbers: set[ArticleNumber], |
116
|
|
|
) -> dict[ArticleNumber, str]: |
117
|
|
|
"""Look up description texts of the specified articles.""" |
118
|
|
|
if not article_numbers: |
119
|
|
|
return {} |
120
|
|
|
|
121
|
|
|
articles = DbArticle.query \ |
122
|
|
|
.options(db.load_only('item_number', 'description')) \ |
123
|
|
|
.filter(DbArticle.item_number.in_(article_numbers)) \ |
124
|
|
|
.all() |
125
|
|
|
|
126
|
|
|
return {a.item_number: a.description for a in articles} |
127
|
|
|
|