background.js

console.log("%cSBCL: Background setup begun", 'color:rgb(247, 255, 129)');

function clear() {
    // Clears all chrome.storage.local contents for the extension
    chrome.storage.local.clear();
    iter_value = undefined;
}

function change_icon(path) {
    chrome.browserAction.setIcon({ path: path });
}

chrome.storage.local.get("iterator", function(result) {
    let iter_value = result.iterator;

    chrome.management.getSelf(function(extensionInfo) {
        let install = 'standard';
        install = extensionInfo.installType; // Comment out for normal development

        if (install === 'development') {
            console.warn("SBCL: Development mode active"); // Shouldn't be error
            console.log("%cSBCL: Clearing local storage...", 'color:rgb(247, 255, 129)');
            clear(); // Remove in production
        } else {
            console.log("%cSBCL: Standard install detected", 'color:rgb(247, 255, 129)');
        }

        if (typeof iter_value === 'undefined' | iter_value == "[object Object]") {
            console.warn("SBCL: Iterator undefined");
            console.log("%cSBCL: Initiating setup...", 'color:rgb(247, 255, 129)');

            const iterator = {
                id: "iterator",
                value: 0,
            }
        
            chrome.storage.local.set({ [iterator.id]: iterator }, () => {
                console.warn("SBCL: Iterator not found. This is expected behaviour for initial setup or indicates a fault in local storage.");
            });
        
            iter_value = 0;
        } else {
            console.log("%cSBCL: Current iterator = " + iter_value, 'color:rgb(247, 255, 129)');
        }
    });
});

chrome.storage.local.get("homework_type", function(result) {
    let type_value = result.homework_type;

    if (typeof type_value === 'undefined' | type_value == "[object Object]") {
            console.warn("SBCL: No previous homework type identified");
            const type_to_save = {
                id: "homework_type",
                value: 8, // Never an acceptable value so clearly indicative of a fault
            }

            chrome.storage.local.set({ [type_to_save.id]: type_to_save }, () => {
                console.log("%cSBCL: Saving default homework type", 'color:rgb(247, 255, 129)');
            });

            chrome.storage.local.get({ [type_to_save.id]: type_to_save}, () => {
                console.log(type_to_save.value);
            });
        } else {
            console.log("%cSBCL: Current homework type = " + type_value, 'color:rgb(247, 255, 129)');
        }
});

// Listen for messages from content scripts
let retrieved_answers = [null];

chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  if (message.type === "SEND_ANSWERS") {
    retrieved_answers = message.data;
  } else if (message.type === "GET_ANSWERS") {
    sendResponse({ array: retrieved_answers });
  }
});