// ==UserScript==
// @name        nightly.link buttons
// @namespace   blankie-scripts
// @match       http*://github.com/*
// @grant       none
// @version     1.2.2
// @author      blankie
// @run-at      document-end
// @description Show buttons to nightly.link on artifacts and build logs
// ==/UserScript==

"use strict";

const INSTANCE_URL = "https://nightly.link";

function addArtifactsButtonAndLinks(artifactsDiv) {
    if (artifactsDiv === null) {
        return false;
    }
    let header = artifactsDiv.querySelector("div.mx-0.mx-md-1");
    if (header === null) {
        return false;
    }

    let artifactsButton = document.createElement("a");
    artifactsButton.className = "btn";
    // https://stackoverflow.com/a/17228764
    artifactsButton.style.float = "right";
    artifactsButton.innerText = "View on nightly.link";
    artifactsButton.href = INSTANCE_URL + location.pathname;
    header.prepend(artifactsButton);

    for (let artifactDiv of artifactsDiv.querySelectorAll("tbody > tr > td > div")) {
        let artifactIcon = artifactDiv.querySelector("span.mr-2");
        let artifactNode = artifactDiv.querySelector("span.text-bold");
        if (artifactIcon === null || artifactNode === null) {
            continue;
        }
        let artifactName = artifactNode.textContent.trim();
        let artifactUrl = INSTANCE_URL + location.pathname + "/" + artifactName + ".zip";

        let newArtifactLink = document.createElement("a");
        newArtifactLink.text = artifactName;
        newArtifactLink.href = artifactUrl;
        newArtifactLink.className = "text-bold no-underline Link--primary";
        artifactNode.replaceWith(newArtifactLink);

        let newArtifactIcon = document.createElement("a");
        newArtifactIcon.className = artifactIcon.className;
        newArtifactIcon.href = artifactUrl;
        for (let child of artifactIcon.children) {
            newArtifactIcon.appendChild(child);
        }
        artifactIcon.replaceWith(newArtifactIcon);
    }

    return true;
}

// https://github.com/EbookFoundation/free-programming-books/actions/runs/3213752190/jobs/5253657996
// https://github.com/kotatogram/kotatogram-desktop/actions/runs/3231502508/jobs/5291098845
function getGithubJobsPath(logsHeader) {
    if (logsHeader === null) {
        // https://github.com/the-blank-x/furry-guide/actions/runs/2613813876
        return location.pathname;
    }
    let timestampElement = logsHeader.querySelector(".CheckRun-header-timestamp");
    if (timestampElement === null) {
        return location.pathname;
    }
    let headerUrl = timestampElement.getAttribute("data-url");
    if (headerUrl === null) {
        return location.pathname;
    }
    let jobLogsUrl = new URL(headerUrl, location);
    return jobLogsUrl.pathname.replace(/\/header\/*$/, "");
}

function addLogsButton(githubLogsButton, logsHeader) {
    let logsUrl = INSTANCE_URL + getGithubJobsPath(logsHeader) + ".txt";

    if (githubLogsButton !== null) {
        let nightlyLogsButton = document.createElement("a");
        nightlyLogsButton.className = "pl-5 dropdown-item btn-link";
        nightlyLogsButton.innerText = "View logs on nightly.link";
        nightlyLogsButton.href = logsUrl;
        githubLogsButton.parentNode.append(nightlyLogsButton);
        return true;
    } else if (logsHeader !== null) {
        let logsLink = document.createElement("a");
        logsLink.innerText = "View on nightly.link";
        logsLink.href = logsUrl;
        logsHeader.append(logsLink);
        return true;
    }
    return false;
}

function handleNewPage() {
    let artifactsDiv = document.body.querySelector("div#artifacts");
    let githubLogsButton = document.body.querySelector("a.js-steps-dropdown-raw-logs");
    let logsHeader = document.body.querySelector("div.js-checks-log-toolbar");
    addArtifactsButtonAndLinks(artifactsDiv) || addLogsButton(githubLogsButton, logsHeader);
};
handleNewPage();

function observerCallback(mutationList, observer) {
    for (mutation of mutationList) {
        if (mutation.type !== "childList") {
            continue;
        }
        for (node of mutation.addedNodes) {
            if (node.nodeName === "BODY") {
                handleNewPage();
                return;
            }
        }
    }
}

let observer = new MutationObserver(observerCallback);
observer.observe(document.body.parentNode, {childList: true});