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path: root/addons/resource/models/resource_mixin.py
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# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from collections import defaultdict
from dateutil.relativedelta import relativedelta
from pytz import utc

from odoo import api, fields, models


def timezone_datetime(time):
    if not time.tzinfo:
        time = time.replace(tzinfo=utc)
    return time


class ResourceMixin(models.AbstractModel):
    _name = "resource.mixin"
    _description = 'Resource Mixin'

    resource_id = fields.Many2one(
        'resource.resource', 'Resource',
        auto_join=True, index=True, ondelete='restrict', required=True)
    company_id = fields.Many2one(
        'res.company', 'Company',
        default=lambda self: self.env.company,
        index=True, related='resource_id.company_id', store=True, readonly=False)
    resource_calendar_id = fields.Many2one(
        'resource.calendar', 'Working Hours',
        default=lambda self: self.env.company.resource_calendar_id,
        index=True, related='resource_id.calendar_id', store=True, readonly=False)
    tz = fields.Selection(
        string='Timezone', related='resource_id.tz', readonly=False,
        help="This field is used in order to define in which timezone the resources will work.")

    @api.model
    def create(self, values):
        if not values.get('resource_id'):
            resource_vals = {'name': values.get(self._rec_name)}
            tz = (values.pop('tz', False) or
                  self.env['resource.calendar'].browse(values.get('resource_calendar_id')).tz)
            if tz:
                resource_vals['tz'] = tz
            resource = self.env['resource.resource'].create(resource_vals)
            values['resource_id'] = resource.id
        return super(ResourceMixin, self).create(values)

    def copy_data(self, default=None):
        if default is None:
            default = {}
        resource = self.resource_id.copy()
        default['resource_id'] = resource.id
        default['company_id'] = resource.company_id.id
        default['resource_calendar_id'] = resource.calendar_id.id
        return super(ResourceMixin, self).copy_data(default)

    # YTI TODO: Remove me in master
    def _get_work_days_data(self, from_datetime, to_datetime, compute_leaves=True, calendar=None, domain=None):
        self.ensure_one()
        return self._get_work_days_data_batch(
            from_datetime,
            to_datetime,
            compute_leaves=compute_leaves,
            calendar=calendar,
            domain=domain
        )[self.id]

    def _get_work_days_data_batch(self, from_datetime, to_datetime, compute_leaves=True, calendar=None, domain=None):
        """
            By default the resource calendar is used, but it can be
            changed using the `calendar` argument.

            `domain` is used in order to recognise the leaves to take,
            None means default value ('time_type', '=', 'leave')

            Returns a dict {'days': n, 'hours': h} containing the
            quantity of working time expressed as days and as hours.
        """
        resources = self.mapped('resource_id')
        mapped_employees = {e.resource_id.id: e.id for e in self}
        result = {}

        # naive datetimes are made explicit in UTC
        from_datetime = timezone_datetime(from_datetime)
        to_datetime = timezone_datetime(to_datetime)

        mapped_resources = defaultdict(lambda: self.env['resource.resource'])
        for record in self:
            mapped_resources[calendar or record.resource_calendar_id] |= record.resource_id

        for calendar, calendar_resources in mapped_resources.items():
            if not calendar:
                for calendar_resource in calendar_resources:
                    result[calendar_resource.id] = {'days': 0, 'hours': 0}
                continue
            day_total = calendar._get_resources_day_total(from_datetime, to_datetime, calendar_resources)

            # actual hours per day
            if compute_leaves:
                intervals = calendar._work_intervals_batch(from_datetime, to_datetime, calendar_resources, domain)
            else:
                intervals = calendar._attendance_intervals_batch(from_datetime, to_datetime, calendar_resources)

            for calendar_resource in calendar_resources:
                result[calendar_resource.id] = calendar._get_days_data(intervals[calendar_resource.id], day_total[calendar_resource.id])

        # convert "resource: result" into "employee: result"
        return {mapped_employees[r.id]: result[r.id] for r in resources} 

    # YTI TODO: Remove me in master
    def _get_leave_days_data(self, from_datetime, to_datetime, calendar=None, domain=None):
        self.ensure_one()
        return self._get_leave_days_data_batch(
            from_datetime,
            to_datetime,
            calendar=calendar,
            domain=domain
        )[self.id]

    def _get_leave_days_data_batch(self, from_datetime, to_datetime, calendar=None, domain=None):
        """
            By default the resource calendar is used, but it can be
            changed using the `calendar` argument.

            `domain` is used in order to recognise the leaves to take,
            None means default value ('time_type', '=', 'leave')

            Returns a dict {'days': n, 'hours': h} containing the number of leaves
            expressed as days and as hours.
        """
        resources = self.mapped('resource_id')
        mapped_employees = {e.resource_id.id: e.id for e in self}
        result = {}

        # naive datetimes are made explicit in UTC
        from_datetime = timezone_datetime(from_datetime)
        to_datetime = timezone_datetime(to_datetime)

        mapped_resources = defaultdict(lambda: self.env['resource.resource'])
        for record in self:
            mapped_resources[calendar or record.resource_calendar_id] |= record.resource_id

        for calendar, calendar_resources in mapped_resources.items():
            day_total = calendar._get_resources_day_total(from_datetime, to_datetime, calendar_resources)

            # compute actual hours per day
            attendances = calendar._attendance_intervals_batch(from_datetime, to_datetime, calendar_resources)
            leaves = calendar._leave_intervals_batch(from_datetime, to_datetime, calendar_resources, domain)

            for calendar_resource in calendar_resources:
                result[calendar_resource.id] = calendar._get_days_data(
                    attendances[calendar_resource.id] & leaves[calendar_resource.id],
                    day_total[calendar_resource.id]
                )

        # convert "resource: result" into "employee: result"
        return {mapped_employees[r.id]: result[r.id] for r in resources}

    def _adjust_to_calendar(self, start, end):
        resource_results = self.resource_id._adjust_to_calendar(start, end)
        # change dict keys from resources to associated records.
        return {
            record: resource_results[record.resource_id]
            for record in self
        }

    def list_work_time_per_day(self, from_datetime, to_datetime, calendar=None, domain=None):
        """
            By default the resource calendar is used, but it can be
            changed using the `calendar` argument.

            `domain` is used in order to recognise the leaves to take,
            None means default value ('time_type', '=', 'leave')

            Returns a list of tuples (day, hours) for each day
            containing at least an attendance.
        """
        resource = self.resource_id
        calendar = calendar or self.resource_calendar_id

        # naive datetimes are made explicit in UTC
        if not from_datetime.tzinfo:
            from_datetime = from_datetime.replace(tzinfo=utc)
        if not to_datetime.tzinfo:
            to_datetime = to_datetime.replace(tzinfo=utc)

        intervals = calendar._work_intervals_batch(from_datetime, to_datetime, resource, domain)[resource.id]
        result = defaultdict(float)
        for start, stop, meta in intervals:
            result[start.date()] += (stop - start).total_seconds() / 3600
        return sorted(result.items())

    def list_leaves(self, from_datetime, to_datetime, calendar=None, domain=None):
        """
            By default the resource calendar is used, but it can be
            changed using the `calendar` argument.

            `domain` is used in order to recognise the leaves to take,
            None means default value ('time_type', '=', 'leave')

            Returns a list of tuples (day, hours, resource.calendar.leaves)
            for each leave in the calendar.
        """
        resource = self.resource_id
        calendar = calendar or self.resource_calendar_id

        # naive datetimes are made explicit in UTC
        if not from_datetime.tzinfo:
            from_datetime = from_datetime.replace(tzinfo=utc)
        if not to_datetime.tzinfo:
            to_datetime = to_datetime.replace(tzinfo=utc)

        attendances = calendar._attendance_intervals_batch(from_datetime, to_datetime, resource)[resource.id]
        leaves = calendar._leave_intervals_batch(from_datetime, to_datetime, resource, domain)[resource.id]
        result = []
        for start, stop, leave in (leaves & attendances):
            hours = (stop - start).total_seconds() / 3600
            result.append((start.date(), hours, leave))
        return result