def clear_jobs(
client: scheduler_v1.CloudSchedulerClient, project_id: str, location_id: str
) -> None:
""" Delete all scheduled jobs """
parent = client.location_path(project_id, location_id)
for job in client.list_jobs(parent):
client.delete_job(job.name)
def schedule_job(
client: scheduler_v1.CloudSchedulerClient,
project_id: str,
location_id: str,
timezone: str,
schedule: str,
path: str,
) -> None:
""" Schedules the given job for the specified project and location """
# Create a Job to schedule
target = AppEngineHttpTarget(relative_uri=path, http_method="GET")
job = Job(app_engine_http_target=target,
schedule=schedule,
time_zone=timezone)
# Schedule the Job we just created
parent = client.location_path(project_id, location_id)
client.create_job(parent, job)
"""
Utility wrappers around Google's Cloud Scheduler API. See
https://googleapis.dev/python/cloudscheduler/latest/_modules/google/cloud/scheduler_v1/gapic/cloud_scheduler_client.html
for API reference.
"""
from typing import Union, Any, Optional, List
from pydantic import BaseModel
from google.cloud.scheduler_v1 import CloudSchedulerClient
from cloud_tasks.conf import REGION, PROJECT_ID
client = CloudSchedulerClient()
parent = client.location_path(PROJECT_ID, REGION)
class JobRetrieveError(BaseException):
pass
class JobCreationError(BaseException):
pass
class JobUpdateError(BaseException):
pass
class JobDeleteError(BaseException):
pass
def start_process():
start_time = time()
storage_client = Client()
scheduler_client = CloudSchedulerClient()
scheduler_path = scheduler_client.location_path(config.PROJECT_ID,
config.REGION_ID)
cred = credentials.ApplicationDefault()
try:
scheduler_client.delete_job(
f"{scheduler_path}/jobs/{config.CRON_NAME}")
except GoogleAPICallError or PermissionDenied:
logging.warning("course-collect manually triggered")
try:
scheduler_client.delete_job(f"{scheduler_path}/jobs/forcequit")
except GoogleAPICallError or PermissionDenied:
logging.warning("forcequit job does not exist")
if not _apps:
initialize_app(cred, {"projectId": config.PROJECT_ID})
logging.info("initializing firebase")
firebase_db = firestore.client()
if storage_client.bucket(config.BUCKET_NAME).exists():
logging.info("reading from existing bucket")
coursepickle_bucket = storage_client.bucket(config.BUCKET_NAME)
else:
logging.info("creating new bucket")
coursepickle_bucket = storage_client.create_bucket(config.BUCKET_NAME)
# Get unfinished course codes
coursecode_blob = coursepickle_bucket.blob(config.COURSE_CODE_BLOB_NAME)
try:
coursecode_raw = coursecode_blob.download_as_string()
unique_course_codes = pickle.loads(coursecode_raw)
except NotFound:
# Fetch course metadata per code for instructor, schedule, time, location, GPA, grade distributions
all_courses = get_all_courses(firebase_db)
unique_course_codes = set(
[course["code"] for course in all_courses.values()])
# Get existing course metadata
coursepickle_blob = coursepickle_bucket.blob(
config.COURSE_METADATA_BLOB_NAME)
try:
course_metadata_raw = coursepickle_blob.download_as_string()
course_metadata = pickle.loads(course_metadata_raw)
except NotFound:
course_metadata = {}
course_metadata = course_metadata if course_metadata else {}
# Conform to free tier limits (looks like {"runtime": 123, "datetime": datetime(...)}
last_modified_blob = coursepickle_bucket.blob(
config.LAST_MODIFIED_BLOB_NAME)
try:
last_modified_raw = last_modified_blob.download_as_string()
last_modified = pickle.loads(last_modified_raw)
except NotFound:
last_modified = {}
last_modified = last_modified if last_modified else {
"runtime": 0,
"datetime": None
}
check_free_tier_force_exit(
scheduler_client, scheduler_path,
get_curr_runtime(last_modified["runtime"], start_time))
if last_modified[
"datetime"] and last_modified["datetime"].day < datetime.now().day:
last_modified["runtime"] = 0
if bool(int(config.UPDATE_EXTRA_FIELDS)):
course_code_done = []
for code in unique_course_codes:
try:
logging.info(f"Checking class {code}")
print(code)
split_code = code.split()
pg = requests_connectionerror_bypass(
config.SCHEDULE_TARGET_URL_FMT,
[config.LATEST_TERM, *split_code], scheduler_client,
scheduler_path, last_modified, start_time)
html_content = requests_bandwith_bypass(
pg, config.SCHEDULE_TARGET_URL_FMT, split_code,
scheduler_client, scheduler_path, last_modified,
start_time)
class_ddtitle = html_content.find_all("th",
{"scope": "colgroup"},
class_="ddtitle")
class_titles = [
th.a.text for th in class_ddtitle
if "table" in str(th.find_next("tr"))
]
class_dddefaults = [
str(c).replace("\n", "")
for c in html_content.find_all("td", class_="dddefault")
if "cc.gatech.edu" in c.text or "students" in c.text
or "lecture" in c.text or "Semester" in c.text
]
class_terms = [
re.search(
"(?<=Associated Term: </span>)([a-zA-Z0-9'\s]*)(?=<br)",
c).group(0).strip() for c in class_dddefaults
]
class_registration_dates = [
re.search(
"(?<=Registration Dates: </span>)([a-zA-Z0-9,\s]*)(?=<br)",
c).group(0).strip() for c in class_dddefaults
]
class_attributes = [
re.search("(?<=Attributes: </span>)([^<]*)(?=<br)",
c).group(0).strip()
if "Attributes" in c else None for c in class_dddefaults
]
class_grade_bases = [
re.search("(?<=Grade Basis: </span>)([A-Z0-9\s]*)(?=<br)",
c).group(0).strip() for c in class_dddefaults
]
class_table = html_content.find_all(
"table", class_="datadisplaytable")[1:-1]
class_schedule_headers = [[
"_".join(header.text.lower().split())
for header in table.find_all("th")
] for table in class_table]
class_schedule_data = [[
header.text.replace("(P)", "").strip()
for header in table.find_all("td")
] for table in class_table]
for c in class_schedule_data:
c[-1] = " ".join(c[-1].split())
instructor_emails = [
re.search(
"([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)",
str(c)).group(1) if "mailto" in str(c) else None
for c in class_table
]
pg = requests_connectionerror_bypass(
config.CRITIQUE_TARGET_URL_FMT, split_code,
scheduler_client, scheduler_path, last_modified,
start_time)
html_content = requests_bandwith_bypass(
pg, config.CRITIQUE_TARGET_URL_FMT, split_code,
scheduler_client, scheduler_path, last_modified,
start_time)
critique_table = html_content.find("table",
{"id": "dataTable"})
critique_headers = [
"_".join(th.text.lower().split())
for th in critique_table.find_all("th")
][1:]
critique_data_raw = [
td.text for td in critique_table.find_all("td")
]
critique_data = [
critique_data_raw[x:x + len(critique_headers) + 1]
for x in range(0, len(critique_data_raw),
len(critique_headers) + 1)
]
critique_instructors = []
for i in range(len(critique_data)):
critique_instructors.append(" ".join(
critique_data[i][0].split(", ")[::-1]))
del critique_data[i][0]
critique_data[i] = [critique_data[i][0]] + [
float(x) for x in critique_data[i][1:]
]
critique_averages = {}
for i in range(len(critique_instructors)):
critique_averages[critique_instructors[i]] = dict(
zip(critique_headers, critique_data[i]))
for i in range(len(class_titles)):
try:
schedule = dict(
zip(class_schedule_headers[i],
class_schedule_data[i]))
except:
print(i)
raise RuntimeError
course_metadata[class_titles[i]] = {
"terms":
class_terms[i],
"registration_dates":
class_registration_dates[i],
"attributes":
class_attributes[i],
"grade_basis":
class_grade_bases[i],
"schedule":
schedule,
"instructor_email":
instructor_emails[i],
"averages":
critique_averages[schedule["instructors"]] if
schedule["instructors"] in critique_averages else None
}
course_code_done.append(code)
except RuntimeError as e:
write_blobs_before_exit(coursepickle_blob, coursecode_blob,
last_modified_blob, course_metadata,
unique_course_codes, course_code_done,
last_modified, start_time)
schedule_next_try(scheduler_client, scheduler_path)
raise e
"""
Fetch per course seat, credit, and requirement information
"""
for i in range(config.START_IDX, config.END_IDX):
try:
logging.info(f"Checking class with id {i}")
pg = requests_connectionerror_bypass(
config.REGISTRATION_TARGET_URL_FMT, [config.LATEST_TERM, i],
scheduler_client, scheduler_path, last_modified, start_time)
html_content = requests_bandwith_bypass(
pg, config.REGISTRATION_TARGET_URL_FMT, [i], scheduler_client,
scheduler_path, last_modified, start_time)
if "-" not in html_content.text:
logging.info(f"skipping {i}")
continue
class_general = html_content.find_all("th", {"scope": "row"},
class_="ddlabel")[0].text
# For classes with dashes in the class name, replace them one by one with spaces
# TODO retain dashes by using an alternative delimiter like " - "
while len(re.findall("-", class_general)) != 3:
class_general = re.sub("-", " ", class_general, 1)
class_general_delimited = [
s.strip() for s in class_general.split("-")
]
class_name = class_general_delimited[0]
class_id = int(class_general_delimited[1])
class_code = class_general_delimited[2]
class_dddefault = " ".join(
html_content.find_all("td",
class_="dddefault")[0].text.replace(
"\n", " ").split())
class_credits = float(
re.search("\d+\.\d+(?=\s+Credits)", class_dddefault).group(0))
class_seats = [
int(
re.search("Seats (-*\d+) (-*\d+) (-*\d+)",
class_dddefault).group(x)) for x in range(1, 4)
]
class_waitlist_seats = [
int(
re.search("Waitlist Seats (-*\d+) (-*\d+) (-*\d+)",
class_dddefault).group(x)) for x in range(1, 4)
]
# Regex search method depends on prerequisites and restrictions combination
if "Prerequisites" in class_dddefault:
if "Restrictions" in class_dddefault:
class_prerequisites = re.search("Prerequisites: (.*)",
class_dddefault).group(1)
class_restrictions = re.search(
"Restrictions: (.*) Prerequisites",
class_dddefault).group(1)
else:
class_prerequisites = re.search("Prerequisites: (.*)",
class_dddefault).group(1)
class_restrictions = None
else:
if "Restrictions" in class_dddefault:
class_prerequisites = None
class_restrictions = re.search("Restrictions: (.*)",
class_dddefault).group(1)
else:
class_prerequisites = None
class_restrictions = None
course_dict = {
"id": class_id,
"code": class_code,
"name": class_name,
"credits": class_credits,
"seats": {
"capacity": class_seats[0],
"actual": class_seats[1],
"remaining": class_seats[2]
},
"waitlist": {
"capacity": class_waitlist_seats[0],
"actual": class_waitlist_seats[1],
"remaining": class_waitlist_seats[2]
},
"restrictions": class_restrictions,
"prerequisites": class_prerequisites,
"last_updated": datetime.now()
}
if class_general in course_metadata:
course_dict.update(course_metadata[class_general])
# Send all collected class metadata
firebase_db.collection(u'{}'.format(
config.PRIMARY_TABLE_NAME)).document(
u'{}'.format(class_id)).set(course_dict)
all_table_name = f"{config.SECONDARY_TABLE_NAME}{i // 500}"
all_courses_doc = firebase_db.collection(
u'{}'.format(all_table_name)).document(
u'{}'.format("all_courses")).get()
if all_courses_doc.exists:
all_courses = all_courses_doc.to_dict()
all_courses[str(class_id)] = course_dict
firebase_db.collection(u'{}'.format(all_table_name)).document(
u'{}'.format("all_courses")).set(all_courses)
else:
firebase_db.collection(u'{}'.format(all_table_name)).document(
u'{}'.format("all_courses")).set(
{str(class_id): course_dict})
except RuntimeError as e:
write_blobs_before_exit(coursepickle_blob, coursecode_blob,
last_modified_blob, course_metadata, [],
[], last_modified, start_time)
schedule_next_try(scheduler_client, scheduler_path)
raise e
# Delete all blobs
coursepickle_blob.delete()
coursecode_blob.delete()
last_modified_blob.delete()
schedule_next_try(scheduler_client,
scheduler_path,
adjust_cron=timedelta(days=1))
return "200 OK"