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from d2.app.model.static import StaticData
from d2.app.adapters import BaseAdapter
from d2.config import Config
from d2.db import Forge
from d2.db import OccupantType
from datetime import datetime
from sqlalchemy import or_
class ForgeAdapter(BaseAdapter):
"""
1. There should always be an empty_occupant record for each plot.
2. We will not mark a plot as empty unless there are no occupants in the plot
"""
def __init__(self, db, log, static, forge):
self._db = db
self._log = log
self._static = static
self._forge = forge
@classmethod
def load(cls, config=None, static=None):
config = config or Config.load()
static = static or StaticData.load(config.db)()
return cls(config.db, config.log, static, Forge)
def get(self, id):
return self._db.session.query(self._forge).filter(
"id=:id").param(id=id).first()
def add_empty_user(self, plot_id):
""" putting an empty user to a given plot
"""
empty = dict(occupant_id = self._static.occupant.empty,
plot_id = plot_id,
date_start = datetime.now(),
date_end = None,
date_created = datetime.now(),
date_override = None)
obj_empty = Forge.from_dict(empty)
self._db.session.add(obj_empty)
self._db.session.commit()
def add_occupant_to_plot(self, plot_id, occupant_id,
date_start=None, date_end=None):
""" add an occupant to a plot
"""
if self._is_empty_plot(plot_id, date_start):
empty_record = self._fetch_forge_by_plot_and_occupant_id(plot_id,
self._static.occupant.empty, date_start)
self._set_override(empty_record)
self._set_end(empty_record, date_end)
date_start= self.build_date(date_start)
data = dict(
plot_id=plot_id,
occupant_id=occupant_id,
date_start=date_start,
date_end=date_end,
date_created=datetime.now(),
date_override=None
)
obj = self._forge.from_dict(data)
self._db.session.add(obj)
self._db.session.commit()
return obj
def remove_occupant_from_plot(self, plot_id, occupant_id,
date_start=None, date_end=None):
""" remove an occupant from a plot
"""
forge_record = self._fetch_forge_by_plot_and_occupant_id(plot_id,
occupant_id, date_start)
if forge_record:
self._set_override(forge_record)
self._set_end(forge_record, date_end)
# if no more occupants in plot_id, mark it as empty
records = self._fetch_forge_by_plot_id(plot_id, date_start)
if not records:
self.add_empty_user(plot_id)
def get_forge_by_occupant_id(self, occupant_id, date_start=None):
if occupant_id:
date_start = self.build_date(date_start)
return self._fetch_forge_by_occupant_id(occupant_id, date_start)
return []
def get_forge_by_plot_id(self, plot_id, date_start=None):
date_start = self.build_date(date_start)
return self._fetch_forge_by_plot_id(plot_id, date_start)
def get_occupant_other_plots(self, plot_id=None, occupant_id=None,
date_start=None):
out = []
date_start = self.build_date(date_start)
results = self._fetch_forge_by_occupant_id(occupant_id, date_start)
for row in results:
if not row.plot_id == plot_id:
out.append(row)
return out
def get_all(self, date_start=None):
date_start = self.build_date(date_start)
records = self._fetch_all(date_start)
return records
def get_all_by_plot_ids(self, plot_ids, date_start=None):
date_start = self.build_date(date_start)
records = self._fetch_by_plot_ids(plot_ids, date_start)
return records
def _set_override(self, forge_obj):
forge_obj.date_override = datetime.now()
self._db.session.commit()
def _set_end(self, forge_obj, date_end=None):
date_end = self.build_date(date_end)
data = forge_obj.as_dict()
del(data['id'])
data['date_end'] = date_end
data['date_created'] = datetime.now()
data['date_override'] = None
obj = self._forge.from_dict(data)
self._db.session.add(obj)
self._db.session.commit()
def _is_empty_plot(self, plot_id, date_start):
""" return True if and only if one record exists for the given plot_id
and the occupant_id in that record is empty user id
"""
is_empty = True
records = self._fetch_forge_by_plot_id(plot_id, date_start)
if not records:
raise Exception("plot_id {0} does not exist".format(plot_id))
if len(records) > 1:
is_empty = False
else:
if records[0].occupant_id != self._static.occupant.empty:
is_empty = False
return is_empty
def _fetch_forge_by_plot_and_occupant_id(self, plot_id,
occupant_id, date_start):
date_start = self.build_date(date_start)
return self._db.session.query(self._forge
).filter(self._forge.plot_id==plot_id
).filter(self._forge.occupant_id==occupant_id
).filter(self._forge.date_override==None
).filter(self._forge.date_start<=date_start
).filter(or_(self._forge.date_end>date_start,
self._forge.date_end==None)
).first()
def _fetch_forge_by_plot_id(self, plot_id, date_start):
date_start = self.build_date(date_start)
return self._db.session.query(self._forge
).filter(self._forge.plot_id==plot_id
).filter(self._forge.date_override==None
).filter(self._forge.date_start<=date_start
).filter(or_(self._forge.date_end>date_start,
self._forge.date_end==None)
).all()
def _fetch_forge_by_occupant_id(self, occupant_id, date_start):
date_start = self.build_date(date_start)
return self._db.session.query(self._forge
).filter(self._forge.occupant_id==occupant_id
).filter(self._forge.date_override==None
).filter(self._forge.date_start<=date_start
).filter(or_(self._forge.date_end>date_start,
self._forge.date_end==None)
).all()
def _fetch_all(self, date_start):
date_start = self.build_date(date_start)
return self._db.session.query(self._forge
).filter(self._forge.date_override==None
).filter(self._forge.date_start<=date_start
).filter(or_(self._forge.date_end>date_start,
self._forge.date_end==None)
).all()
def _fetch_by_plot_ids(self, plot_ids, date_start):
date_start = self.build_date(date_start)
return self._db.session.query(self._forge
).filter(self._forge.plot_id.in_(plot_ids)
).filter(self._forge.date_override==None
).filter(self._forge.date_start<=date_start
).filter(or_(self._forge.date_end>date_start,
self._forge.date_end==None)
).all()
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