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<template>
<div v-if="offline" class="offline-message">
<i class="far fa-dizzy"></i>
<h1>
You're offline friend.
<span @click="checkOffline"> <i class="fas fa-redo-alt"></i></span>
</h1>
</div>
</template>
<script>
export default {
name: "ConnectivityChecker",
data: function () {
return {
offline: false,
};
},
created: function () {
if (/t=\d+/.test(window.location.href)) {
window.history.replaceState({}, document.title, window.location.pathname);
}
let that = this;
this.checkOffline();
document.addEventListener(
"visibilitychange",
function () {
if (document.visibilityState == "visible") {
that.checkOffline();
}
},
false
);
window.addEventListener(
"online",
function () {
that.checkOffline();
},
false
);
window.addEventListener(
"offline",
function () {
this.offline = true;
},
false
);
},
methods: {
checkOffline: function () {
if (!navigator.onLine) {
this.offline = true;
return;
}
// extra check to make sure we're not offline
let that = this;
const urlPath = window.location.pathname.replace(/\/+$/, "");
const aliveCheckUrl = `${window.location.origin}${urlPath}/index.html?t=${new Date().valueOf()}`;
return fetch(aliveCheckUrl, {
method: "HEAD",
cache: "no-store",
redirect: "manual",
})
.then(function (response) {
// opaqueredirect means request has been redirected, to auth provider probably
if (
(response.type === "opaqueredirect" && !response.ok) ||
[401, 403].indexOf(response.status) != -1
) {
window.location.href = aliveCheckUrl;
}
that.offline = !response.ok;
})
.catch(function () {
that.offline = true;
})
.finally(function () {
that.$emit("network-status-update", that.offline);
});
},
},
};
</script>
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