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utils.py
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utils.py
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# Copyright 2024 D-Wave Systems Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import random
import string
from app_configs import REQUESTED_SHIFT_ICON, UNAVAILABLE_ICON
import numpy as np
import pandas as pd
from dash import dash_table
from faker import Faker
NOW = datetime.datetime.now()
SCHEDULE_LENGTH = 14
# Determine how many days away Sunday is then get two Sundays from that Sunday
START_DATE = NOW + datetime.timedelta(6 - NOW.weekday() + 14)
COL_IDS = [str(i+1) for i in range(SCHEDULE_LENGTH)] # The ids for each column
# The shift dates
SHIFTS = [
(START_DATE + datetime.timedelta(i)).strftime("%e").strip()
for i in range(SCHEDULE_LENGTH)
]
DAYS = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
WEEKEND_IDS = ["1", "7", "8", "14"]
def get_random_string(length):
"""Generate a random string of a given length."""
letters = string.ascii_lowercase
result_str = "".join(random.choice(letters) for _ in range(length))
return result_str
def get_random_names(num_employees):
"""Generate a list of names for the employees to be scheduled."""
fake = Faker()
names = []
letters = string.ascii_uppercase
for i in range(num_employees):
n = fake.first_name()
li = random.choice(letters)
full_name = n + " " + li
while full_name in names:
n = fake.first_name()
li = random.choice(letters)
full_name = n + " " + li
names.append(full_name)
return names
def build_random_sched(num_employees, rand_seed=None):
"""Builds a random availability schedule for employees."""
if rand_seed:
np.random.seed(rand_seed)
data = pd.DataFrame(
np.random.choice([UNAVAILABLE_ICON, " ", REQUESTED_SHIFT_ICON], size=(num_employees + 1, len(COL_IDS)), p=[0.1, 0.8, 0.1]),
columns=COL_IDS,
)
num_managers = 2
employees = get_random_names(num_employees)
for i in range(num_managers):
employees[i] += "-Mgr"
employees.append(employees[-1] + "-Tr")
data.insert(0, "Employee", employees)
data[COL_IDS[0]].replace(UNAVAILABLE_ICON, " ", inplace=True)
data[COL_IDS[-1]].replace(UNAVAILABLE_ICON, " ", inplace=True)
data.loc[data.Employee == employees[-1], data.columns[1:]] = " "
return data
def build_schedule_from_sample(sample, employees):
"""Builds a schedule from the sample returned."""
data = pd.DataFrame(columns=COL_IDS)
data.insert(0, "Employee", employees)
for key, val in sample.items():
row, col = key.split("_")
if val == 1.0:
data.loc[data["Employee"] == row, col] = " "
else:
data.loc[data["Employee"] == row, col] = UNAVAILABLE_ICON
return data
def get_cols():
"""Gets information for column headers, including months and days."""
start_month = START_DATE.strftime("%B %Y") # Get month and year
end_month = (START_DATE + datetime.timedelta(SCHEDULE_LENGTH-1)).strftime("%B %Y") # Get month and year
month_display = [start_month, end_month]
return (
[{"id": "Employee", "name": ["", "", "Employee"]}]
+ [{"id": str(i+1), "name": [
month_display[0 if i < 7 else 1], DAYS[i%7], c
]} for i, c in enumerate(SHIFTS)]
)
def get_cell_styling(cols):
"""Sets conditional cell styling."""
return [
{
"if": {"column_id": cols[1:]},
"minWidth": "45px",
"width": "45px",
"maxWidth": "45px",
},
]
def display_availability(df):
"""Builds the visual display of employee availability."""
datatable = dash_table.DataTable(
data=df.to_dict("records"),
columns=get_cols(),
cell_selectable=False,
editable=False,
style_cell={"textAlign": "center"},
style_cell_conditional=get_cell_styling(df.columns),
style_data_conditional=[
{
"if": {"row_index": "odd"},
"backgroundColor": "#f5f5f5",
},
]
+ [
{
"if": {"column_id": weekend_id},
"backgroundColor": "#E5E5E5",
} for weekend_id in WEEKEND_IDS
]
+ [
{
"if": {
"filter_query": f'{{{col_id}}} = {UNAVAILABLE_ICON}',
"column_id": col_id,
},
"backgroundColor": "#FF7006", # orange
"color": "white",
}
for col_id in COL_IDS
]
+ [
{
"if": {
"filter_query": f'{{{col_id}}} = {REQUESTED_SHIFT_ICON}',
"column_id": col_id,
},
"backgroundColor": "#008c82", # teal
"color": "white",
}
for col_id in COL_IDS
],
merge_duplicate_headers=True,
)
return datatable
def display_schedule(df, availability):
"""Builds the visual schedule for display."""
df[df.iloc[:, 1:] == UNAVAILABLE_ICON] = "\r" # mark all unscheduled days with an invisible character
for employee_name, employee_availability in availability.items():
for i, col_id in enumerate(COL_IDS):
if employee_availability[i] == 0: # not available
df.loc[df["Employee"] == employee_name, col_id] = UNAVAILABLE_ICON
elif employee_availability[i] == 2: # available
df.loc[df["Employee"] == employee_name, col_id] += REQUESTED_SHIFT_ICON
datatable = dash_table.DataTable(
data=df.to_dict("records"),
columns=get_cols(),
cell_selectable=False,
editable=False,
style_cell={"textAlign": "center"},
style_cell_conditional=get_cell_styling(df.columns),
style_data_conditional=[
{
"if": {"row_index": "odd"},
"backgroundColor": "#f5f5f5",
},
]
+ [
{
"if": {"column_id": weekend_id},
"backgroundColor": "#E5E5E5",
} for weekend_id in WEEKEND_IDS
]
+ [
{
"if": {
"filter_query": f'{{{col_id}}} contains " "',
"column_id": col_id,
},
"backgroundColor": "#2a7de1", # blue
"color": "white",
}
for col_id in COL_IDS
]
+ [
{
"if": {
"filter_query": f'{{{col_id}}} contains "\r" && {{{col_id}}} contains {REQUESTED_SHIFT_ICON}',
"column_id": col_id,
},
"backgroundImage": "linear-gradient(-45deg, #c7003860 10%, transparent 10%, transparent 20%,\
#c7003860 20%, #c7003860 30%, transparent 30%, transparent 40%, #c7003860 40%, #c7003860 50%,\
transparent 50%, transparent 60%, #c7003860 60%, #c7003860 70%, transparent 70%, transparent 80%,\
#c7003860 80%, #c7003860 90%, transparent 90%, #fff)", # light red
}
for col_id in COL_IDS
],
merge_duplicate_headers=True,
)
return datatable
def availability_to_dict(availability_list):
"""Converts employee availability to a dictionary."""
availability_dict = {}
for row in availability_list:
availability_dict[row["Employee"]] = [
0 if row[col_id] == UNAVAILABLE_ICON else 2 if row[col_id] == REQUESTED_SHIFT_ICON else 1 for col_id in COL_IDS
]
return availability_dict