quatalog-scraper/transfer_scraper/main.py

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Python
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import json
import html
import sys
import re
import os.path
import traceback
from time import sleep
import random
from signal import alarm, SIGALRM, signal
from fake_useragent import UserAgent
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import StaleElementReferenceException
from selenium.common.exceptions import TimeoutException
from selenium.common.exceptions import NoSuchElementException
def raise_(ex):
raise ex
def normalize_class_name(input):
text = list(input)
for i in range(1, len(text)):
if (text[i - 1] == " ") or (text[i - 1] == text[i] == "I"):
continue
text[i] = text[i].lower()
return "".join(text)
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def wait(ec):
global driver
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WebDriverWait(
driver, 20, ignored_exceptions=[StaleElementReferenceException]
).until(ec)
sleep(random.uniform(400, 1900) / 1000)
def scrape_course_card(html_id, i, note):
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global driver
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trs = (
driver.find_element("id", html_id)
.find_elements(By.CSS_SELECTOR, ".course-detail")[i]
.find_elements(By.TAG_NAME, "tr")
)
course_name_and_id = trs[0].text.split()
course_desc = ""
if trs[1].find_element(By.TAG_NAME, "td").get_attribute("colspan") == "2":
course_desc = trs[1].text
course_department = (
next((x for x in trs if x.text.strip().startswith("Department:")))
.find_elements(By.TAG_NAME, "td")[1]
.text.title()
)
course_catalog = (
next((x for x in trs if x.text.strip().startswith("Source catalog:")))
.find_elements(By.TAG_NAME, "td")[1]
.text
)
try:
k = 1 + next(
i for i, v in enumerate(course_name_and_id) if bool(re.search(r"\d", v))
)
course_id = " ".join(course_name_and_id[0:k])
course_name = normalize_class_name(" ".join(course_name_and_id[k:]))
except StopIteration: # Handling for Not Transferrable
course_id = course_name_and_id[0]
course_name = normalize_class_name(" ".join(course_name_and_id[1:]))
if not note:
try:
course_credits = (
next((x for x in trs if x.text.strip().startswith("Units:")))
.find_elements(By.TAG_NAME, "td")[1]
.text.strip()
)
except:
course_credits = ""
return {
"id": course_id,
"name": course_name,
"credits": course_credits,
"desc": course_desc,
"department": course_department,
"catalog": course_catalog,
}
else:
course_note = driver.find_element("id", "lblCommentsPublic").text.strip()
return {
"id": course_id,
"name": course_name,
"note": course_note,
"desc": course_desc,
"department": course_department,
"catalog": course_catalog,
}
def main():
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global driver
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if len(sys.argv) != 4:
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print(
f"USAGE: python {sys.argv[0]} <transfer file> <state file> <timeout minutes>"
)
exit(1)
transfer_json_path = sys.argv[1]
state_json_path = sys.argv[2]
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timeout_seconds = int(sys.argv[3]) * 60
# Set up timeout so that the GH action does not run forever, pretend it's ^C
signal(SIGALRM, lambda a, b: raise_(KeyboardInterrupt))
alarm(timeout_seconds)
options = webdriver.FirefoxOptions()
user_agent = UserAgent().random
print(f"Using randomized user agent {user_agent}", file=sys.stderr)
if sys.argv[-1] != "gui":
options.add_argument("--headless")
options.set_preference("general.useragent.override", user_agent)
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driver = webdriver.Firefox(options=options)
driver.get(
"https://tes.collegesource.com/publicview/TES_publicview01.aspx?rid=f080a477-bff8-46df-a5b2-25e9affdd4ed&aid=27b576bb-cd07-4e57-84d0-37475fde70ce"
)
num_pages = int(
driver.find_element("id", "lblInstWithEQPaginationInfo").text.split()[-1]
)
print(f"{num_pages} pages detected", file=sys.stderr)
state = {"inst_pg": 1, "inst_idx": 0, "course_pg": 1, "course_idx": 0}
institutions = {}
if os.path.isfile(state_json_path):
with open(state_json_path, "r") as statejson:
state = json.load(statejson)
if os.path.isfile(transfer_json_path):
with open(transfer_json_path, "r") as transferjson:
institutions = json.load(transferjson)
print("Loaded state: ", end="", file=sys.stderr)
json.dump(state, sys.stderr, indent=4)
print("", file=sys.stderr)
try:
curr_page = 1
while state["inst_pg"] <= num_pages:
page = driver.find_element("id", f"gdvInstWithEQ")
if state["inst_pg"] != 1:
while curr_page != state["inst_pg"]:
print(f"Jumping to institution page {curr_page}", file=sys.stderr)
jumpable_pages = {
int(x.get_attribute("href").split("'")[3][5:]): x
for x in driver.find_elements(
By.CSS_SELECTOR,
"""a[href^="javascript:__doPostBack('gdvInstWithEQ','Page$"]""",
)
}
curr_page = int(
driver.find_element(
"id", "lblInstWithEQPaginationInfo"
).text.split()[-3]
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)
if state["inst_pg"] in jumpable_pages:
jumpable_pages[state["inst_pg"]].click()
curr_page = state["inst_pg"]
elif state["inst_pg"] < min(jumpable_pages):
jumpable_pages[min(jumpable_pages)].click()
curr_page = min(jumpable_pages)
else:
jumpable_pages[max(jumpable_pages)].click()
curr_page = max(jumpable_pages)
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wait(EC.staleness_of(page))
sleep(random.uniform(3, 6))
page = driver.find_element("id", f"gdvInstWithEQ")
inst_list_len = len(
page.find_elements(
By.CSS_SELECTOR, "a[id^=gdvInstWithEQ_btnCreditFromInstName_]"
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)
)
while state["inst_idx"] < inst_list_len:
institution_link = driver.find_element(
"id", "gdvInstWithEQ"
).find_elements(
By.CSS_SELECTOR, "a[id^=gdvInstWithEQ_btnCreditFromInstName_]"
)[
state["inst_idx"]
]
fields = institution_link.find_element(By.XPATH, "../..").find_elements(
By.CSS_SELECTOR, ".gdv_boundfield_uppercase"
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)
inst_name = institution_link.text.title().strip()
city = fields[0].text.title().strip()
us_state = fields[1].text.strip()
institution_link.click()
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wait(EC.staleness_of(institution_link))
try:
course_pages_len = int(
driver.find_element(
"id", "lblInstWithEQPaginationInfo"
).text.split()[-1]
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)
except NoSuchElementException:
course_pages_len = 1
try:
courses = institutions[inst_name]["courses"]
except:
courses = []
while state["course_pg"] <= course_pages_len:
course_links_len = len(
driver.find_element("id", "gdvCourseEQ").find_elements(
By.CSS_SELECTOR, "a[id^=gdvCourseEQ_btnViewCourseEQDetail_]"
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)
)
while state["course_idx"] < course_links_len:
course_link = driver.find_element(
"id", "gdvCourseEQ"
).find_elements(
By.CSS_SELECTOR, "a[id^=gdvCourseEQ_btnViewCourseEQDetail_]"
)[
state["course_idx"]
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]
course_link.click()
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try:
wait(
EC.element_to_be_clickable(
(By.CSS_SELECTOR, ".modal-header button")
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),
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)
transfer = [
scrape_course_card("lblSendCourseEQDetail", i, False)
for i in range(
0,
len(
driver.find_element(
"id", "lblSendCourseEQDetail"
).find_elements(
By.CSS_SELECTOR, ".course-detail"
)
),
)
]
rpi = [
scrape_course_card("lblReceiveCourseEQDetail", i, True)
for i in range(
0,
len(
driver.find_element(
"id", "lblReceiveCourseEQDetail"
).find_elements(
By.CSS_SELECTOR, ".course-detail"
)
),
)
]
print(
f"{inst_name} ({state['inst_idx']}:{state['inst_pg']}/{num_pages}): {transfer[0]['id']} {transfer[0]['name']} -> {rpi[0]['id']} {rpi[0]['name']} ({state['course_idx']}:{state['course_pg']}/{course_pages_len})",
file=sys.stderr,
)
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begin_date = driver.find_element(
"id", "lblBeginEffectiveDate"
).text
end_date = driver.find_element(
"id", "lblEndEffectiveDate"
).text
driver.find_element(
By.CSS_SELECTOR, ".modal-header button"
).click()
courses += [
{
"transfer": transfer,
"rpi": rpi,
"begin": begin_date,
"end": end_date,
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}
]
state["course_idx"] += 1
except (Exception, KeyboardInterrupt) as e:
institutions.update(
{
inst_name: {
"city": city,
"state": us_state,
"courses": courses,
}
}
)
raise e
state["course_idx"] = 0
state["course_pg"] += 1
institutions.update(
{inst_name: {"city": city, "state": us_state, "courses": courses}}
)
state["course_pg"] = 1
state["inst_idx"] += 1
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driver.find_element("id", "btnSwitchView").click()
wait(
EC.text_to_be_present_in_element(
("id", "lblInstWithEQPaginationInfo"), str(state["inst_pg"])
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),
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)
state["inst_idx"] = 0
state["inst_pg"] = (state["inst_pg"] % num_pages) + 1
except (Exception, KeyboardInterrupt) as e:
print("Program hits exception and will save and terminate", file=sys.stderr)
print(traceback.format_exc(), file=sys.stderr)
print("Program will terminate with state: ", end="", file=sys.stderr)
json.dump(state, sys.stderr, indent=4)
print("", file=sys.stderr)
with open(transfer_json_path, "w") as transferjson:
json.dump(institutions, transferjson, indent=4)
with open(state_json_path, "w") as statejson:
json.dump(state, statejson, indent=4)
driver.quit()
if __name__ == "__main__":
main()