No description, website, or topics provided.
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.

Hacking the Library - Community Calendar

Emily Yeh, Leon Lam


Currently, email is the primary way for people to find out about events that (have happened/are happening/will happen) on campus. We decided to explore an alternative method of event storage and display in the form of a community calendar - a calendar of events arranged by date that the community can access and contribute to.


Our app is a standard calendar hosted on Heroku that displays truncated event names under their dates. Clicking on arrows next to the month/date will shift the calendar view to an adjacent month, displaying the events occuring during that new time period. Alternatively, an input box allows users to 'Do the Doctor Who' and jump to other month/year combinations.

Main page Calendar page.

Clicking on the 'Agenda View' button or the number in any box will load an agenda view page with the appropriate events. The 'Agenda View' button will load all events starting in that month, whereas the number in any box will load all events starting on that date.

Agenda view Agenda view page.

Clicking on the 'Submit Event' button will load an event submission page where the user can input the details of their event and submit it. After submission, the event will be stored in Heroku's postgreSQL database where it can be retrieved at a later date.

Submit event


The code is a standard flask webapp. We have a file that acts as the skeleton of the website, some static resources like backgrounds and CSS files, and html templates that display the data to the user.

Data is passed from HTML templates to python by HTML form inputs. Flask receives this as a dictionary request.form, and parses it to retrieve the relevant information. Data is passed back into HTML by way of Flask's render_template method.

The events themselves are stored in a postgreSQL server provided by Heroku (hobby-dev level, 10000 rows available - if necessary, we could purchase a more expensive database plan). We use psycopg2 as a connector between the python code and the database.

Running the Code

  1. Create Heroku App (preferably with GitHub)
  2. Provision postgreSQL database for app
  3. Push code to app
  4. Open app in browser

Issues and Enhancements

Currently, global variables (display_month and display_year) are used to keep track of the month and year to display - this has the unfortunate side effect of making one user's actions affect every other user's displayed calendar (since we only tested with one user, this was totally fine). In the future, we'd want to use sessions or something similar to keep user's display months and years separate from each other.

In addition, the only search available at the moment happens automatically upon clicking the days on the calendar or hitting the 'agenda view' button. Users are unable to search events by tag, name or description - the code infrastructure is in place, but the web form to compile their queries into an SQL query safely has not been made yet. In the future, we'd want to let users search all event fields.