How to use the Export API

const clientId = "public-api";
const clientSecret = "ff99971a-f8c3-4d21-5345-f7cb021b4b54";
const username = "versiondog";              // octoplant user username
const password = "change-it";               // octoplant user password
const baseUrl = "https://localhost:64023";  // octoplant server address and port of the api

function grpcStatusCodeToText(code) {
    switch (code) {
        case 0: return "OK";
        case 1: return "CANCELLED";
        case 2: return "UNKNOWN";
        case 3: return "INVALID_ARGUMENT";
        case 4: return "DEADLINE_EXCEEDED";
        case 5: return "NOT_FOUND";
        case 6: return "ALREADY_EXISTS";
        case 7: return "PERMISSION_DENIED";
        case 8: return "RESOURCE_EXHAUSTED";
        case 9: return "FAILED_PRECONDITION";
        case 10: return "ABORTED";
        case 11: return "OUT_OF_RANGE";
        case 12: return "UNIMPLEMENTED";
        case 13: return "INTERNAL";
        case 14: return "UNAVAILABLE";
        case 15: return "DATA_LOSS";
        case 16: return "UNAUTHENTICATED";
        default: return `Unknown code ${code}`;
    }
}

async function handleErrorResponse(response) {
    if (response.ok)
        return
    let error = await response.json();
    if (error.code)
        error["codeText"] = grpcStatusCodeToText(error.code);
    if (error.error.code)
        error.error["codeText"] = grpcStatusCodeToText(error.error.code);
    console.dir(error);
    throw new Error(`Response status: ${response.status}`);
}

// send the post / get request message
async function fetchGrpc(input, init) {
    if (init.body)
        console.log(`${init.method}: ${input} with body: ${init.body}`);
    else
        console.log(`${init.method}: ${input}`);

    const response = await fetch(input, init);
    await handleErrorResponse(response);
    return response;
}

// authentication returns a token for the requests
async function authenticate() {
    const response = await fetchGrpc(`${baseUrl}/v1/oauth2/token`, {
        "credentials": "include",
        "headers": {
            "Content-Type": "application/x-www-form-urlencoded"
        },
        "body": `grant_type=password&username=${username}&password=${password}&client_id=${clientId}&client_secret=${clientSecret}`,
        "method": "POST",
        "mode": "cors"
    });
    const authData = await response.json()
    return authData.access_token
}

// request the export order
async function startExport(token, data) {
    const response = await fetchGrpc(`${baseUrl}/v1/order`, {
        "credentials": "include",
        "headers": {
            "Accept": "application/json",
            "authorization": `Bearer ${token}`
        },
        "body": JSON.stringify(data),
        "method": "POST",
        "mode": "cors"
    });
    return await response.json()
}

// request a cancel of the ordered export
async function cancelExport(token, name) {
    const response = await fetchGrpc(`${baseUrl}/v1/order/${name}/cancel`, {
        "credentials": "include",
        "headers": {
            "Accept": "application/json",
            "authorization": `Bearer ${token}`
        },
        "method": "POST",
        "mode": "cors"
    });
    return await response.json()
}

// request and perform the download of the ordered export 
async function downloadExport(token, name) {
    const response = await fetchGrpc(`${baseUrl}/v1/order/${name}/download`, {
        "credentials": "include",
        "headers": {
            "Accept": "application/json",
            "authorization": `Bearer ${token}`
        },
        "method": "GET",
        "mode": "cors"
    });
    return await response.blob()
}

// request the status of the export
async function getExport(token, name) {
    const response = await fetchGrpc(`${baseUrl}/v1/order/${name}`, {
        "credentials": "include",
        "headers": {
            "Accept": "application/json",
            "authorization": `Bearer ${token}`
        },
        "method": "GET",
        "mode": "cors"
    });
    let j = await response.json()
    if (j.error && j.error.code) {
        j.error.codeText = grpcStatusCodeToText(j.error.code);
    }
    return j;
}

async function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

// create a simple export
async function simpleExport(token) {

    // request export with the json for the wished exports - here: project tree
    let e = await startExport(token, {
        exportContents: {
            projectTree: {}
        }
    });
    console.dir(e);

    // request the status of the export
    // if done is set to true: the creation is finished (succesful or failed)
    do {
        await sleep(1000);
        e = await getExport(token, e.name);
        // print the response (JSON) - just for documentation
        console.dir(e);
    } while (!e.done)

    // download the ordered export.
    // the zip package includes a contents.json and all requested exports
    let d = await downloadExport(token, e.name)
    // Just printing the blob - actually save the zip file
    console.dir(d)
}

async function main() {
    const token = await authenticate();

    const fn = simpleExport;
    try {
        console.log(`Running function: ${fn.name}`);
        await fn(token);
    } catch (e) {
        console.error(`Error in function ${fn.name}:`, e);
    }
}