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/**
* @param {String} queryLabel - Default query label for chart
* @param {Object} metricAttributes - Default metric attribute values (e.g. method, instance)
* @returns {String} The formatted query label
* @example
* singleAttributeLabel('app', {__name__: "up", app: "prometheus"}) -> "app: prometheus"
*/
const singleAttributeLabel = (queryLabel, metricAttributes) => {
if (!queryLabel) return '';
const relevantAttribute = queryLabel.toLowerCase().replace(' ', '_');
const value = metricAttributes[relevantAttribute];
if (!value) return '';
return `${queryLabel}: ${value}`;
};
/**
* @param {String} queryLabel - Default query label for chart
* @param {Object} metricAttributes - Default metric attribute values (e.g. method, instance)
* @returns {String} The formatted query label
* @example
* templatedLabel('__name__', {__name__: "up", app: "prometheus"}) -> "__name__"
*/
const templatedLabel = (queryLabel, metricAttributes) => {
if (!queryLabel) return '';
// eslint-disable-next-line array-callback-return
Object.entries(metricAttributes).map(([templateVar, label]) => {
const regex = new RegExp(`{{\\s*${templateVar}\\s*}}`, 'g');
// eslint-disable-next-line no-param-reassign
queryLabel = queryLabel.replace(regex, label);
});
return queryLabel;
};
/**
* @param {Object} metricAttributes - Default metric attribute values (e.g. method, instance)
* @returns {String} The formatted query label
* @example
* multiMetricLabel('', {__name__: "up", app: "prometheus"}) -> "__name__: up, app: prometheus"
*/
const multiMetricLabel = metricAttributes => {
return Object.entries(metricAttributes)
.map(([templateVar, label]) => `${templateVar}: ${label}`)
.join(', ');
};
/**
* @param {String} queryLabel - Default query label for chart
* @param {Object} metricAttributes - Default metric attribute values (e.g. method, instance)
* @returns {String} The formatted query label
*/
const getSeriesLabel = (queryLabel, metricAttributes) => {
return (
singleAttributeLabel(queryLabel, metricAttributes) ||
templatedLabel(queryLabel, metricAttributes) ||
multiMetricLabel(metricAttributes) ||
queryLabel
);
};
/**
* @param {Array} queryResults - Array of Result objects
* @param {Object} defaultConfig - Default chart config values (e.g. lineStyle, name)
* @returns {Array} The formatted values
*/
// eslint-disable-next-line import/prefer-default-export
export const makeDataSeries = (queryResults, defaultConfig) =>
queryResults
.map(result => {
// NaN values may disrupt avg., max. & min. calculations in the legend, filter them out
const data = result.values.filter(([, value]) => !Number.isNaN(value));
if (!data.length) {
return null;
}
const series = { data };
return {
...defaultConfig,
...series,
name: getSeriesLabel(defaultConfig.name, result.metric),
};
})
.filter(series => series !== null);
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