system-pri/backend/app/coordinator/utils.py

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import datetime
from collections import defaultdict
from io import BytesIO
from itertools import chain
from typing import Generator, Any, List
import pandas as pd
from reportlab.lib import colors
from reportlab.lib.enums import TA_CENTER
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.units import mm, inch
from reportlab.platypus import SimpleDocTemplate, Paragraph, PageBreak, Table
from .exceptions import InvalidNameOrTypeHeaderException
from ..students.models import Student
# from ..examination_schedule.models import Enrollment
def check_columns(df: pd.DataFrame) -> bool:
headers = set(df.keys().values)
columns = ['NAZWISKO', 'IMIE', 'INDEKS', 'PESEL', 'EMAIL']
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if len(headers - set(columns)) != 0:
return False
flag = True
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col_types = ['object', 'object', 'int', 'float64', 'object']
for name, col_type in zip(columns, col_types):
if not str(df.dtypes[name]).startswith(col_type):
flag = False
break
return flag
def parse_csv(file, mode) -> Generator[Student, Any, None]:
df = pd.read_csv(file)
if not check_columns(df):
raise InvalidNameOrTypeHeaderException
students = (Student(last_name=dict(item.items())['NAZWISKO'],
first_name=dict(item.items())['IMIE'],
index=dict(item.items())['INDEKS'],
pesel=str(int(dict(item.items())['PESEL'])) if not pd.isna(
dict(item.items())['PESEL']) else None,
email=dict(item.items())['EMAIL'],
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mode=mode)
for _, item in df.iterrows())
return students
def generate_csv(students: List[Student]) -> str:
headers = ['PESEL', 'INDEKS', 'IMIE', 'NAZWISKO', 'EMAIL', 'CDYD_KOD', 'PRZ_KOD', 'TZAJ_KOD', 'GR_NR', 'PRG_KOD']
data = [(student.pesel, student.index, student.first_name, student.last_name, student.email,
student.group.cdyd_kod, student.group.prz_kod, student.group.tzaj_kod, student.group.project_supervisor_id,
None) for student in students]
dataframe = defaultdict(list)
for row in data:
for idx, item in enumerate(row):
dataframe[headers[idx]].append(item)
df = pd.DataFrame(dataframe)
return df.to_csv(index=False)
def generate_examination_schedule_pdf_file(title: str, nested_enrollments: List[List[object]]) -> bytes:
pagesize = (297 * mm, 210 * mm)
headers = ["lp.", "Godzina", "Nazwa projektu", "Opiekun", "Zespol", "Komisja"]
pdf_buffer = BytesIO()
my_doc = SimpleDocTemplate(
pdf_buffer,
pagesize=pagesize,
topMargin=1 * inch,
leftMargin=1 * inch,
rightMargin=1 * inch,
bottomMargin=1 * inch,
title=title
)
style = getSampleStyleSheet()
bodyText = style['BodyText']
bodyText.fontName = 'Helvetica'
normal = style["Heading1"]
normal.alignment = TA_CENTER
flowables = []
# print(nested_enrollments)
for enrollments in nested_enrollments:
if len(enrollments) == 0:
continue
date = datetime.datetime.strftime(enrollments[0].start_date, '%d/%m/%Y')
paragraph_1 = Paragraph(f"{title} ~ {date}", normal)
flowables.append(paragraph_1)
data = [headers]
for idx, e in enumerate(enrollments, start=1):
new_date = e.start_date + datetime.timedelta(hours=2)
group_name = e.group.name if e.group is not None else ""
if group_name != '':
ps = e.group.project_supervisor
project_supervisor_fullname = f"{ps.first_name[0]}. {ps.last_name}"
students = e.group.students
# print(students)
team = ", ".join([f"{s.first_name} {s.last_name}" for s in students])
else:
project_supervisor_fullname = ""
team = ""
members = e.committee.members
# print(members)
if len(members) == 0:
committee = ''
else:
members_iter = (f"{m.first_name[0]} {m.last_name}" for m in members)
if project_supervisor_fullname != '':
members_iter = chain(members_iter, [project_supervisor_fullname])
committee = ", ".join(members_iter)
data.append([str(idx), new_date.strftime("%H:%M"),
Paragraph(group_name, bodyText),
Paragraph(project_supervisor_fullname, bodyText),
Paragraph(team, bodyText),
Paragraph(committee, bodyText),
])
# print(data)
table = Table(data=data,
style=[
('GRID', (0, 0), (-1, -1), 0.5, colors.black),
('BACKGROUND', (0, 0), (-1, 0), colors.HexColor("#A6F1A6")),
('BACKGROUND', (0, 0), (1, -1), colors.HexColor("#A6F1A6"))
],
colWidths=[0.25 * inch, 0.7 * inch, 1.6 * inch, 1.5 * inch, 4 * inch, 3 * inch]
)
flowables.append(table)
flowables.append(PageBreak())
my_doc.build(flowables)
pdf_value = pdf_buffer.getvalue()
pdf_buffer.close()
return pdf_value