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Instant Demo State Reset Script (< 2 seconds).
Restores the database to a clean, deterministic institutional state for live presentations.
"""
from __future__ import annotations
import datetime
import os
import sys
import time
PROJECT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
if PROJECT_ROOT not in sys.path:
sys.path.insert(0, PROJECT_ROOT)
from alembic import command
from alembic.config import Config
from sqlalchemy import delete, select
from backend.app.api.auth.hasher import hash_password
from backend.app.api.auth.seeder import seed_default_accounts
from backend.app.domain.models import (
BacklogRecord,
BacklogStatus,
Drive,
OfferRecord,
OfferSource,
OfferStatus,
Student,
)
from backend.app.storage.database import SessionLocal
from backend.app.storage.models.entities import (
AcademicRecordModel,
AuditLogModel,
BacklogModel,
CompanyModel,
DriveModel,
DriveRequirementVersionModel,
EligibilityDecisionModel,
OfferModel,
PanelModel,
RoomModel,
ScheduleModel,
SlotModel,
StudentModel,
UserModel,
)
from backend.app.storage.repositories.mappers import student_domain_to_entity
def reset_demo() -> None:
start_time = time.perf_counter()
print("========================================================")
print("INSTITUTIONAL PLACEMENT ENGINE: DEMO STATE RESET")
print("========================================================")
# 1. Run migrations to ensure clean schema
print("[1/4] Checking and syncing SQLite schema via Alembic...")
alembic_ini_path = os.path.join(PROJECT_ROOT, "backend", "alembic.ini")
alembic_cfg = Config(alembic_ini_path)
alembic_cfg.set_main_option("script_location", os.path.join(PROJECT_ROOT, "backend", "alembic"))
command.upgrade(alembic_cfg, "head")
# 2. Clear transactional and staging tables cleanly
print("[2/4] Clearing transactional and staging tables...")
with SessionLocal() as db:
db.execute(delete(SlotModel))
db.execute(delete(ScheduleModel))
db.execute(delete(EligibilityDecisionModel))
db.execute(delete(PanelModel))
db.execute(delete(DriveRequirementVersionModel))
db.execute(delete(DriveModel))
db.execute(delete(CompanyModel))
db.execute(delete(BacklogModel))
db.execute(delete(OfferModel))
db.execute(delete(AcademicRecordModel))
db.execute(delete(UserModel))
db.execute(delete(StudentModel))
db.execute(delete(RoomModel))
db.execute(delete(AuditLogModel))
db.commit()
# 3. Seed Default Accounts
print("[3/4] Seeding default authentication accounts...")
seed_default_accounts()
# 4. Seed Standard Demo Rooms
rooms = [
RoomModel(id="hall_1", name="Auditorium Hall A", building="Main Block", capacity=150, has_computers=False),
RoomModel(id="hall_2", name="Seminar Hall B", building="Main Block", capacity=100, has_computers=False),
RoomModel(id="lab_1", name="Computing Lab 1", building="IT Block", capacity=80, has_computers=True),
RoomModel(id="lab_2", name="Computing Lab 2", building="IT Block", capacity=60, has_computers=True),
RoomModel(id="cabin_1", name="Interview Cabin 1", building="Placement Cell", capacity=6, has_computers=False),
RoomModel(id="cabin_2", name="Interview Cabin 2", building="Placement Cell", capacity=6, has_computers=False),
RoomModel(id="cabin_3", name="Interview Cabin 3", building="Placement Cell", capacity=6, has_computers=False),
RoomModel(id="cabin_4", name="Interview Cabin 4", building="Placement Cell", capacity=6, has_computers=False),
]
db.add_all(rooms)
# 5. Enrich Demo Students (Personas A, B, C)
# Persona B: Priya Nair (Lateral Entry)
stu2 = db.execute(select(StudentModel).where(StudentModel.roll_no == "PIPE_002")).scalar_one()
stu2.name = "Priya Nair"
stu2.branch = "Information Technology"
stu2.cgpa = 7.8
stu2.twelfth_percentage = None
stu2.diploma_percentage = 82.5 # Lateral Entry
# Cleared backlog
db.add(
BacklogModel(
id="bl_pipe_002",
student_id=stu2.id,
subject="Engineering Mathematics",
semester=3,
status="cleared",
cleared_on=datetime.date(2026, 10, 15),
)
)
# Existing regular offer
db.add(
OfferModel(
id="off_pipe_002",
student_id=stu2.id,
company="Wipro",
ctc_lpa=6.0,
offer_date=datetime.date(2026, 10, 1),
source="on_campus",
is_dream=False,
status="accepted",
)
)
# Persona C: Student 3 (Rohan Gupta - 9.8 CGPA but Policy Blocked)
stu3 = StudentModel(
id="stu_pipe_003",
roll_no="PIPE_003",
name="Rohan Gupta",
email="rohan.gupta@college.edu",
branch="Computer Science and Engineering",
program="B.Tech",
cgpa=9.8,
tenth_percentage=95.0,
twelfth_percentage=96.0,
date_of_birth=datetime.date(2004, 2, 14),
)
db.add(stu3)
db.flush()
db.add(
OfferModel(
id="off_pipe_003",
student_id=stu3.id,
company="Infosys",
ctc_lpa=8.0,
offer_date=datetime.date(2026, 9, 25),
source="on_campus",
is_dream=False,
status="accepted",
)
)
db.add(
UserModel(
id="usr_stu_pipe_003",
username="PIPE_003",
email="rohan.gupta@college.edu",
password_hash=hash_password("123456"),
role="student",
student_id=stu3.id,
is_active=True,
)
)
# 6. Seed Demo Companies & Drives
today = datetime.date(2026, 11, 20)
c1 = CompanyModel(id="comp_techcorp", name="TechCorp Solutions", industry="IT Services", tier="Standard")
c2 = CompanyModel(id="comp_innotech", name="InnoTech Labs", industry="Product", tier="Dream")
c3 = CompanyModel(id="comp_northwind", name="Northwind Dynamics", industry="Deep Tech", tier="Super Dream")
db.add_all([c1, c2, c3])
db.flush()
# Drive 1: TechCorp (Regular, 7.5 LPA)
d1 = DriveModel(
id="drive_techcorp",
company_id="comp_techcorp",
company_name="TechCorp Solutions",
drive_date=today,
mode="on_campus",
ctc_lpa=7.5,
is_dream=False,
status="published",
version=1,
)
req1 = DriveRequirementVersionModel(
id="req_techcorp_v1",
drive_id="drive_techcorp",
version_number=1,
min_cgpa=7.0,
min_tenth_percentage=60.0,
min_twelfth_percentage=60.0,
allowed_branches_json='["Computer Science and Engineering", "Information Technology", "Electronics and Communication Engineering"]',
max_active_backlogs=0,
max_gap_years=1,
)
d1.requirement_versions.append(req1)
# Drive 2: InnoTech (Dream Drive, 14.0 LPA)
d2 = DriveModel(
id="drive_innotech",
company_id="comp_innotech",
company_name="InnoTech Labs",
drive_date=today,
mode="on_campus",
ctc_lpa=14.0,
is_dream=True,
status="published",
version=1,
)
req2 = DriveRequirementVersionModel(
id="req_innotech_v1",
drive_id="drive_innotech",
version_number=1,
min_cgpa=7.5,
min_tenth_percentage=65.0,
min_twelfth_percentage=65.0,
allowed_branches_json='["Computer Science and Engineering", "Information Technology"]',
max_active_backlogs=0,
max_gap_years=1,
)
d2.requirement_versions.append(req2)
# Drive 3: Northwind (Super-Dream Drive, 22.0 LPA)
d3 = DriveModel(
id="drive_northwind",
company_id="comp_northwind",
company_name="Northwind Dynamics",
drive_date=today + datetime.timedelta(days=1),
mode="on_campus",
ctc_lpa=22.0,
is_dream=True,
status="published",
version=1,
)
req3 = DriveRequirementVersionModel(
id="req_northwind_v1",
drive_id="drive_northwind",
version_number=1,
min_cgpa=8.5,
min_tenth_percentage=75.0,
min_twelfth_percentage=75.0,
allowed_branches_json='["Computer Science and Engineering"]',
max_active_backlogs=0,
max_gap_years=0,
)
d3.requirement_versions.append(req3)
db.add_all([d1, d2, d3])
db.commit()
elapsed = time.perf_counter() - start_time
print(f"[4/4] Demo state restored successfully in {elapsed:.3f} seconds (< 2.0s target).")
print("Accounts: officer/officer123 | coordinator/coord123 | PIPE_001/123456 | PIPE_002/123456 | PIPE_003/123456")
print("========================================================")
if __name__ == "__main__":
reset_demo()
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