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/**
* @typedef {Object} Check
* @property {String} status - 'pass'|'fail'|'warn'
* @property {String} output - Details. Not present if 'pass'
*/
/**
* @typedef {Check} HealthCheck
* @property {Map<String, Check>} checks
*/
async function getHealthCheck() {
const url = "api/healthcheck";
try {
const response = await fetch(url);
if (!response.ok) {
throw new Error(`Response status: ${response.status}`);
}
const json = await response.json();
return json;
} catch (error) {
console.error(error.message);
}
}
function updateStatus(check) {
const statusElm = document.getElementById("status");
const issuesElm = document.getElementById("issues");
switch (check.status) {
case "pass":
issuesElm.textContent = "No issues detected";
statusElm.setAttribute("class", "ok");
break;
case "fail":
issuesElm.textContent = check.output;
statusElm.setAttribute("class", "error");
break;
case "warn":
issuesElm.textContent = check.output;
statusElm.setAttribute("class", "warning");
break;
default:
issuesElm.textContent = "Unknown";
statusElm.setAttribute("class", "warning");
}
}
getHealthCheck().then((healthCheck) => {
const table = document.getElementById("services");
const evtSource = new EventSource("sse");
updateStatus(healthCheck);
for (const [service, check] of Object.entries(healthCheck.checks)) {
const row = table.insertRow();
const nameNode = row.insertCell();
nameNode.textContent = service;
const stateNode = row.insertCell();
switch (check.status) {
case "pass":
stateNode.textContent = "Operational";
stateNode.setAttribute("class", "ok");
break;
case "fail":
stateNode.textContent = "Down";
stateNode.title = check.output;
stateNode.setAttribute("class", "error");
break;
case "warn":
stateNode.textContent = "Warning";
stateNode.title = check.output;
stateNode.setAttribute("class", "warning");
break;
default:
stateNode.textContent = "Unknown";
statusElm.setAttribute("class", "warning");
}
evtSource.addEventListener(service, (event) => {
const status = JSON.parse(event.data);
stateNode.textContent = status.state;
stateNode.title = status.output;
});
}
});
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