// SARS-CoV-2-Viz
// Animated COVID case count visualization
// Copyright 2022 Edward L. Platt <ed@elplatt.com>

const metadataUrl = "https://raw.githubusercontent.com/CSSEGISandData/COVID-19/master/csse_covid_19_data/UID_ISO_FIPS_LookUp_Table.csv";

async function getMetadata(onProgress) {
    const content = await fetchWithProgress(metadataUrl, onProgress);
    return content;
}

function parseMetadataTSV(tsv, onProgress) {
    return tsvToJSON(tsv, onProgress);
}

async function parseMetadata(content, onProgress) {
    // Convert to TSV then to object
    onProgress("initializing...");
    let tsv = await csvToTSV(
	content,
	(progress) => onProgress(`parsing CSV: ${progress}`));
    let metadata = parseMetadataTSV(
	tsv,
	(progress) => onProgress(`buidling data structure: ${progress}`));
    onProgress("done");
    return metadata;
}

function populationMap(metadata) {
    let result = {};
    for (const row of metadata) {
	if (row["FIPS"]) {
	    result[row["FIPS"]] = parseInt(row["Population"]);
	}
    }
    return result;
}