* Set the header type to Javascript and JSON encode the result. */

* Execute a given mysqli statement and return sucess & debug info * * Used for UPDATE/INSERT/DELETE statements, to make sure that they happened

* Decrypts content which was stored in the database * * The goal is to obfuscate some of the data in the database so it isn't * in plaintext

Helper functions

* Allows for supplying a callback function to run when a class is found which * successfully acts as a requisite for the requirements. The arguments

Course-loading functions

* Get a given user's preferences from the users table * * @param string $athena a string of the user's username * * @return array data of

* Creates the storable string which holds our precious class data. * Used primarily in saved classes

* Create an array of info on a particular class of a particular year. */

* Encrypts content for storage in the database * * The goal is to obfuscate some of the data in the database so it isn't * in plaintext if th

* Builds match requirement object from requisites syntax. By default, you * expect something like "18.03", but you must also handle extra information

* Builds match parameters object from requisites syntax. Handles when the match * param is a number and when it is an object. Returns a match params

* Pulls a list of saved roads and their data of a given user * * @param string $athena a string of the user's username * * @return array a

* Determines whether a hash maps to a road in the database * * Checks both the hash directly, and whether the hash is actually a user's * nam

* Checks whether a hash is safe to overwrite * * Make sure that the newly saved hash won't overwrite a prior road * with a different set of c

* Create an array of info on a custom-created class. */

* Update a given user's preferences * * @param string $athena a string of the user's username * @param array $userprefs an associative ar

* Adds a user to the users table, with default values * * Use updateUserPrefs($athena, $userprefs) below to set other values * * @param st

* Changes a road's hash when a user renames one of their saved roads * * @param string $oldhash a string of the old road hash * @param string

* Copies a road's hash when a user saves with login * * When a user logs in, we need to duplicate their just-saved road into a * road saved u

* Deletes a user's saved road * * @param string $hash a string of the road hash * @param string $athena a string of the user's username

* Fetches the top autocompleted subject ids from a given query * * @param string $query a string which is part/all of a course id * * @ret

* Fetches the class info for a course id as close to the desired year as * possible * * If no year is requested, we pull the class info from

* Pulls class and major data for a given road * * Also accounts for whether the hash is actually a user's username (and that * user has a pub

* Accessor for the private database link (for __DEV__ mode only) * * @return object the database link * @throws die trying to load the db obj

* Pulls a list of years a class has been offered * * @param string $class a string of a course id * * @return array<int> the years that cl

* Checks whether a given user has a public road set * * @param string $athena a string of the user's username * * @return bool whether the

* Initializes the database link $_db with its variables * * Creates a new mysqli object and stores that database link for use in the * other

* Generate the innerHTML for the info box to be used for when the class is * highlighted. */

* Turn "2013" into "'12-'13" */

* Generate the HTML of the dropdown which holds the list of offered years for * a given class. */

* Saves new road into database with given data * * Note that this method does NOT check if a hash is safe to overwrite before * running. *

* Sets a hash as a public road for a given user * * Since only one road per user may be public, this also sets all of their * other roads to

* Sets a comment on a user's saved road * * @param string $oldhash a string of the road hash * @param string $comment a string of the road co

* Check whether a given user exists * * @param string $athena a string of the user's username * * @return bool whether user exists * @a

* Overwrite the constructor to prevent CourseRoadDB singletons */

Major/minor functions

* Defines new wire's properties (black/grey, straight/curved) * partially based on the relative semesters and terms of the two * would-be connected

UI/Page-loading functions