fairlanguage-firefox/content_scripts/fairlang.js

// ---------------------------------
// Content script to be run on pages
// ---------------------------------

function checkTextarea(textarea) {
	console.log("click " + textarea.id + " -> " + textarea.value);

	// TODO make queries to the fairlanguage server

	fetch("https://fairlanguage2.dev-star.de/checkDocument?data=liebe+Bürger&json")
		.then(response => response.json())
		.then(response => {
			console.log(response);
		})
		.catch(error => console.log(error));
}

(function() {
	// Only run this script once
	if (window.hasRun) {
		return;
	}
	window.hasRun = true;

	// Search for all text areas
	document.querySelectorAll("textarea").forEach(function(textarea) {
		// for testing: highlight textarea with red border
		// TODO
		textarea.style.border = "2px solid red";

		// Create a "Check fairness" button which is placed next to the textarea
		// TODO image button integrated into the textarea...
		var buttonCheck = document.createElement("button");
		buttonCheck.textContent = "Check fairness!";

		// Add click event listener
		buttonCheck.addEventListener("click", (e) => {
			checkTextarea(textarea);
		});

		// Append button to the textarea
		textarea.after(buttonCheck);
	});
})();