realfan/src/js/api.php

<script>
const http = {
	request: function(method, path, payload, callbk) {
		payload = payload || null;
		callbk = callbk || null;
		const oReq = new XMLHttpRequest();
		document.getElementById('loader').style = '';
		oReq.addEventListener("load", function() {
			document.getElementById('loader').style = 'display: none';
			if (callbk)
				callbk(this.responseText);
		});
		oReq.open(method, path);
		oReq.setRequestHeader('Content-Type', 'application/json');
		oReq.send(payload);
	},
	get: function(path, payload, callbk) {
		return http.request('GET',  path, payload, callbk);
	},
	post: function(path, payload, callbk) {
		return http.request('POST', path, payload, callbk);
	}
};

const API = {
	mastodon: {
		registerInstance: function(instance) {
			if (instance === null)
				instance = document.getElementById('instanceURL').value;
			http.get('/api/login/mastodon/get_client.php?instance='+encodeURIComponent(instance), {}, function(data) 
			{
				data = JSON.parse(data);
				if (data.status === 'err') {
					alert(data.message);
					return;
				}

				const res = data.message;
				const oauthUrl = res.instance+'/oauth/authorize?client_id='+encodeURIComponent(res.result.client_id)+'&redirect_uri='+encodeURIComponent(res.result.redirect_uri+'?id='+res.id)+'&response_type='+encodeURIComponent(res.response_type)+'&scope='+encodeURIComponent(res.scope);
				localStorage['auth_data'] = JSON.stringify(res);
				document.location.href = oauthUrl;
			});
		}
	}
}
</script>