339 lines
10 KiB
Python
339 lines
10 KiB
Python
# Society Self-Service
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# Copyright © 2018–2020 Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from django.contrib.auth.models import User
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from django.db import models
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from django.utils import timezone
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from jsonfield import JSONField
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from decimal import Decimal
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from enum import Enum
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class DescriptionEnum(Enum):
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def __new__(cls, value, description):
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obj = object.__new__(cls)
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obj._value_ = value
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obj.description = description
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return obj
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class Budget(models.Model):
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pass
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class BudgetComment(models.Model):
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budget = models.ForeignKey(Budget, on_delete=models.CASCADE)
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author = models.ForeignKey(User, on_delete=models.PROTECT, related_name='+')
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time = models.DateTimeField()
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content = models.TextField()
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class Meta:
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ordering = ['id']
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class BudgetState(DescriptionEnum):
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DRAFT = 10, 'Draft'
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WITHDRAWN = 15, 'Withdrawn'
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RESUBMIT = 20, 'Returned for redrafting'
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AWAIT_REVIEW = 30, 'Awaiting Treasury review'
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ENDORSED = 40, 'Endorsed by Treasury, awaiting committee approval'
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APPROVED = 50, 'Approved'
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CANCELLED = 60, 'Cancelled'
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class BudgetAction(DescriptionEnum):
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CREATE = 5, 'Created'
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EDIT = 10, 'Edited'
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UPDATE_STATE = 20, 'Updated state'
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class BudgetRevision(models.Model):
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budget = models.ForeignKey(Budget, on_delete=models.CASCADE)
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name = models.CharField(max_length=100)
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date = models.DateField()
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contributors = models.ManyToManyField(User, related_name='+')
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comments = models.TextField()
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author = models.ForeignKey(User, on_delete=models.PROTECT, related_name='+')
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time = models.DateTimeField()
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event_dt = models.DateTimeField(null=True)
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event_attendees = models.CharField(max_length=20, null=True)
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state = models.IntegerField(choices=[(v.value, v.description) for v in BudgetState])
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revenue = JSONField(default=[])
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revenue_comments = models.TextField()
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expense = JSONField(default=[])
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expense_no_emergency_fund = models.BooleanField()
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expense_comments = models.TextField()
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action = models.IntegerField(choices=[(v.value, v.description) for v in BudgetAction])
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class Meta:
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ordering = ['id']
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def copy(self):
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contributors = list(self.contributors.all())
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self.pk, self.id = None, None
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self.save()
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self.contributors.add(*contributors)
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def update_state(self, user, state):
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self.copy()
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self.author = user
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self.time = timezone.now()
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self.state = state.value
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self.action = BudgetAction.UPDATE_STATE.value
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self.save()
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def get_revenue_total(self):
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total = Decimal(0)
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for item in self.revenue:
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total += Decimal(item['Unit price']) * Decimal(item['Units'])
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if item['IWT'] and item['Unit price'] > 0:
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total -= (Decimal(item['Unit price']) - (Decimal(item['Unit price']) - Decimal('0.8133')) / Decimal('1.01884')) * item['Units']
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return total
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def get_expense_total(self):
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total = Decimal(0)
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for item in self.expense:
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total += Decimal(item['Unit price']) * Decimal(item['Units'])
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if not self.expense_no_emergency_fund:
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total *= Decimal('1.05')
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return total
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# Access control
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def can_view(self, user):
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if user == self.author:
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return True
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if user in self.contributors.all():
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return True
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if user.groups.filter(name='Treasury').exists():
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return True
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if self.state in (BudgetState.AWAIT_REVIEW.value, BudgetState.ENDORSED.value, BudgetState.APPROVED.value) and user.groups.filter(name='Committee').exists():
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return True
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return False
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def can_edit(self, user):
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# Cannot edit if cannot view
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if not self.can_view(user):
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return False
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# No one can edit if already approved
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if self.state == BudgetState.APPROVED.value:
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return False
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# Only Treasurer or Secretary may edit if submitted
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if self.state not in (BudgetState.DRAFT.value, BudgetState.RESUBMIT.value, BudgetState.WITHDRAWN.value):
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if user.groups.filter(name='Treasury').exists() or user.groups.filter(name='Secretary').exists():
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return True
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return False
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# Otherwise the submitter may edit
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if user == self.author:
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return True
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if user in self.contributors.all():
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return True
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if user.groups.filter(name='Treasury').exists():
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return True
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# Otherwise cannot edit
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return False
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def can_submit(self, user):
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if not self.can_edit(user):
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return False
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if self.state in (BudgetState.DRAFT.value, BudgetState.RESUBMIT.value, BudgetState.WITHDRAWN.value):
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return True
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return False
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def can_withdraw(self, user):
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if not self.can_view(user):
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return False
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if user != self.author and user not in self.contributors.all() and not user.groups.filter(name='Treasury').exists():
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return False
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if self.state in (BudgetState.DRAFT.value, BudgetState.RESUBMIT.value, BudgetState.AWAIT_REVIEW.value, BudgetState.ENDORSED.value):
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return True
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return False
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def can_endorse(self, user):
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if not self.can_edit(user):
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return False
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if not user.groups.filter(name='Treasury').exists():
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return False
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if self.state in (BudgetState.AWAIT_REVIEW.value, BudgetState.DRAFT.value, BudgetState.RESUBMIT.value, BudgetState.WITHDRAWN.value):
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return True
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return False
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def can_return(self, user):
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if self.state != BudgetState.AWAIT_REVIEW.value:
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return False
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return self.can_endorse(user)
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def can_approve(self, user):
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if not self.can_edit(user):
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return False
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if not user.groups.filter(name='Secretary').exists() and not user.groups.filter(name='Treasury').exists():
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return False
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if self.state != BudgetState.APPROVED.value:
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return True
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return False
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def can_cmtereturn(self, user):
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if self.state == BudgetState.APPROVED.value:
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return False
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return self.can_approve(user)
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def can_cancel(self, user):
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if not self.can_view(user):
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return False
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if not user.groups.filter(name='Secretary').exists() and not user.groups.filter(name='Treasury').exists():
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return False
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if self.state != BudgetState.APPROVED.value:
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return False
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return True
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class ClaimState(DescriptionEnum):
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DRAFT = 10, 'Draft'
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WITHDRAWN = 15, 'Withdrawn'
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RESUBMIT = 20, 'Returned for redrafting'
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AWAIT_REVIEW = 30, 'Awaiting Treasury approval'
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APPROVED = 40, 'Approved by Treasury, awaiting payment'
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PAID = 50, 'Paid'
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class ClaimAction(DescriptionEnum):
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CREATE = 5, 'Created'
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EDIT = 10, 'Edited'
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UPDATE_STATE = 20, 'Updated state'
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class ReimbursementClaim(models.Model):
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purpose = models.CharField(max_length=100)
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date = models.DateField()
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budget_id = models.CharField(max_length=20)
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comments = models.TextField()
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author = models.ForeignKey(User, on_delete=models.PROTECT, related_name='+')
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time = models.DateTimeField()
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state = models.IntegerField(choices=[(v.value, v.description) for v in ClaimState])
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items = JSONField(default=[])
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payee_name = models.TextField()
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payee_bsb = models.CharField(max_length=7)
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payee_account = models.TextField(max_length=20)
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def get_total(self):
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total = Decimal(0)
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for item in self.items:
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total += Decimal(item['Unit price']) * Decimal(item['Units'])
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return total
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def update_state(self, user, state):
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self.state = state.value
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self.save()
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claim_history = ClaimHistory()
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claim_history.claim = self
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claim_history.author = user
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claim_history.state = self.state
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claim_history.time = timezone.now()
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claim_history.action = ClaimAction.UPDATE_STATE.value
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claim_history.save()
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# Access control
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def can_view(self, user):
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if user == self.author:
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return True
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if user.groups.filter(name='Treasury').exists():
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return True
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return False
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def can_edit(self, user):
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# Cannot edit if cannot view
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if not self.can_view(user):
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return False
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# No one can edit if already paid
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if self.state == ClaimState.PAID.value:
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return False
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# Only Treasurer may edit if submitted
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if self.state not in (ClaimState.DRAFT.value, ClaimState.RESUBMIT.value, ClaimState.WITHDRAWN.value):
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if user.groups.filter(name='Treasury').exists():
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return True
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return False
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# Otherwise the submitter or Treasurer may edit
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if user == self.author:
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return True
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if user.groups.filter(name='Treasury').exists():
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return True
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# Otherwise cannot edit
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return False
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def can_submit(self, user):
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if not self.can_edit(user):
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return False
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if self.state in (ClaimState.DRAFT.value, ClaimState.RESUBMIT.value, ClaimState.WITHDRAWN.value):
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return True
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return False
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def can_withdraw(self, user):
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if not self.can_view(user):
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return False
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if user != self.author and not user.groups.filter(name='Treasury').exists():
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return False
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if self.state in (ClaimState.AWAIT_REVIEW.value, ClaimState.APPROVED.value, ClaimState.DRAFT.value, ClaimState.RESUBMIT.value):
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return True
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return False
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def can_approve(self, user):
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if not self.can_edit(user):
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return False
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if not user.groups.filter(name='Treasury').exists():
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return False
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if self.state in (ClaimState.DRAFT.value, ClaimState.RESUBMIT.value, ClaimState.AWAIT_REVIEW.value, ClaimState.WITHDRAWN.value):
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return True
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return False
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def can_return(self, user):
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return self.can_approve(user)
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class ClaimReceipt(models.Model):
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claim = models.ForeignKey(ReimbursementClaim, on_delete=models.CASCADE)
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uploaded_file = models.FileField(upload_to='receipt_uploads/%Y/%m/%d/')
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class ClaimComment(models.Model):
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claim = models.ForeignKey(ReimbursementClaim, on_delete=models.CASCADE)
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author = models.ForeignKey(User, on_delete=models.PROTECT, related_name='+')
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time = models.DateTimeField()
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content = models.TextField()
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class Meta:
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ordering = ['id']
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class ClaimHistory(models.Model):
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claim = models.ForeignKey(ReimbursementClaim, on_delete=models.CASCADE)
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author = models.ForeignKey(User, on_delete=models.PROTECT, related_name='+')
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state = models.IntegerField(choices=[(v.value, v.description) for v in ClaimState])
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time = models.DateTimeField()
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action = models.IntegerField(choices=[(v.value, v.description) for v in ClaimAction])
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