// ==UserScript==
// @name Sci Hub Injector
// @version 1.1
// @description Adds SciHub links to popular publishing websites to make free access to science even easier.
// @icon https://git.sr.ht/~lucasew/userscripts/blob/master/sci-hub-injector/icon.png
// @namespace scihub-injector
// @license        GNU GPL v3.0 or later. http://www.gnu.org/copyleft/gpl.html
// @include https://pubmed.ncbi.nlm.nih.gov/*
// @include https://www.nature.com/*
// @include https://www.tandfonline.com/*
// @include https://www.sciencedirect.com/*
// @include http://www.eurekaselect.com/*
// @include https://www.science.org/*
// @include https://dom-pubs.onlinelibrary.wiley.com/doi/*
// @include https://link.springer.com/*
// @include https://ieeexplore.ieee.org/*
// @downloadURL none
// ==/UserScript==

(function () {
    function sciHubLink(doi) {
        return `https://sci-hub.se/${doi}`;
    }

    function pubMed() {
        const doi = document.querySelector(".identifier.doi > a").innerText;
        const links = document.querySelector(".full-text-links-list");
        links.innerHTML += `
    <a class="link-item dialog-focus" href="${sciHubLink(
        doi
    )}" target="_blank" rel="noopener" title="See full text on SciHub"><img src="https://sci-hub.se/misc/img/logo_en.png" alt="full text provider logo"><span class="text">SciHub</span></a>
    `;
    }

    function nature() {
        const doi = document
            .querySelector(
                ".c-bibliographic-information__list-item--doi > p > span.c-bibliographic-information__value"
            )
            .textContent.split(".org/")[1];
        const menu = document.querySelector(
            "aside .c-nature-box.c-nature-box--side.u-hide-print"
        );
        menu.innerHTML += `
        <div class="js-access-button">
                <a href="${sciHubLink(doi)}" class="c-article__button">
                    <img class="u-icon" width="18" height="18" aria-hidden="true" focusable="false" src="https://sci-hub.se/misc/img/ravenround.gif" />
                    <span class="c-article__button-text" style="margin-left: 8px;">Access on SciHub</span>
                </a>
        </div>
        `;
    }

    function taylorFrancis() {
        const doi = document
            .querySelector(".dx-doi > a")
            .textContent.split(".org/")[1];
        const menu = document.querySelector(".tab-nav");
        menu.innerHTML += `
    <li role="tab" aria-selected="false" aria-expanded="false">
        <a class="grant-access" href="${sciHubLink(doi)}">
        Access on SciHub
        </a>
    </li>
        `;
    }

    function sciencedirect() {
        // Add timeout to prevent them from removing the link...
        setTimeout(() => {
            const doi = document.querySelector(".doi").textContent.split(".org/")[1];
            const menu = document.querySelector(".toolbar-buttons > ul");
            menu.innerHTML += `
        <li class="PrimaryCtaButton" id="PrimaryCtaButton">
        <a
        class="link-button link-button-primary accessbar-primary-link"
        role="button"
        rel="nofollow"
        href="${sciHubLink(doi)}"
        >
        <img width="24" height="24" src="https://sci-hub.se/misc/img/ravenround.gif" /> 
        <span class="link-button-text">Access on&nbsp;<strong>SciHub</strong></span></a
        >
    </li>
    `;
        }, 1000);
    }

    function eurekaSelect() {
        const doiLinks = Array.from(document.querySelectorAll("a"))
            .filter((a) => a.href.includes("doi.org"))
            .map((a) => a.href);
        const doi = doiLinks[0].split(".org/")[1];
        const form = document.getElementById("addtocartForm");
        form.innerHTML += `
    <div class="col-md-4 text-right">
        <a href="${sciHubLink(doi)}" class="btn btn-download hvr-icon-hang">
        View on SciHub

        <img width="24" height="24" src="https://sci-hub.se/misc/img/ravenround.gif" /> 
        </a>
    </div>
    `;
    }

    function science() {
        const doiLinks = Array.from(document.querySelectorAll("a"))
            .filter((a) => a.href.includes("doi.org"))
            .map((a) => a.href);
        const doi = doiLinks[0].split(".org/")[1];
        const menu = document.querySelector(".info-panel__formats.info-panel__item");
        menu.innerHTML += `
    <a
        href="${sciHubLink(doi)}"
        data-toggle="tooltip"
        title=""
        class="btn btn__request-access ml-1"
        data-original-title="GET ACCESS"
        ><img width="24" height="24" src="https://sci-hub.se/misc/img/ravenround.gif" class="mr-2" /> <span>get free access</span></a
    >
    `;
    }

    function wiley() {
        const doiLinks = Array.from(document.querySelectorAll("a"))
            .filter((a) => a.href.includes("doi.org"))
            .map((a) => a.href);
        const doi = doiLinks[0].split(".org/")[1];
        const menu = document.querySelector(".coolBar__second.rlist");
        menu.innerHTML += `
    <div class="coolBar__section coolBar--download PdfLink cloned">
        <a href="${sciHubLink(
            doi
        )}" title="SciHub" class="coolBar__ctrl pdf-download"
        ><img
            src="https://sci-hub.se/misc/img/ravenround.gif"
            alt="SciHub Logo"
        />
        Access on SciHub
        </a>
    </div>
    `;
    }

    function springerLink() {
        const url = document.location.href;
        const doi = getSpringerDoi(url);
        if (url.includes("journal")) {
            springerLinkJournal();
        } else if (url.includes("article")) {
            springerLinkArticle(doi);
        } else {
            springerLinkGeneral(doi);
        }
    }

    function getSpringerDoi(url) {
        return decodeURIComponent(url).match(/10.+?[^#]+/)?.[0];
    }

    function springerLinkJournal() {
        const articleListElements = Array.from(document.querySelectorAll(".app-volumes-and-issues__article-list > li"));
        for (const articleElement of articleListElements) {
            const articleUrl = articleElement.querySelector("h3 a").getAttribute("href");
            const doi = getSpringerDoi(articleUrl);
            articleElement.querySelector(".c-meta").innerHTML += `
        <li class="c-meta__item c-meta__item--block-sm-max">
            <a href="${sciHubLink(doi)}" title="SciHub">View on SciHub</a>
        </li>
        `;
        }
    }

    function springerLinkArticle(doi) {
        const details = document.querySelector(".c-article-info-details");
        details.innerHTML += `
        <a class="c-article-info-details__cite-as" href="${sciHubLink(doi)}" title="SciHub">
        <img width=24 height=24 src="https://sci-hub.se/misc/img/ravenround.gif" style="vertical-align:bottom"/>
        View On SciHub
        </a>
    `;
    }

    function springerLinkGeneral(doi) {
        const contextContainer = document.querySelector(".main-context__container") || document.getElementById("book-metrics");
        contextContainer.innerHTML += `
        <div style="align-self:center">
        <a href="${sciHubLink(doi)}" title="SciHub">
            <img width=24 height=24 src="https://sci-hub.se/misc/img/ravenround.gif" style="width:24px; vertical-align:bottom"/>
            View On SciHub
        </a>
        </div>
    `;
    }

    function ieeexploreLink() {
        let foundLinks = [];
        document.querySelectorAll("a").forEach(l => {
            if (l.href.includes("doi.org")) {
                foundLinks.push(l.href);
            }
        });
        const doi = foundLinks[0].split(".org/")[1];
        const node = document.querySelectorAll(".document-banner-metric-container")[0];
        console.log(node)
        node.outerHTML += `
            <button class="sip-modal-button stats-document-banner-viewDocument" onClick="window.open('${sciHubLink(doi)}', '__blank__')">
                <div class="main-txt"> SciHub </div>
            </button>
        `;
    }

    function addSciHubLink() {
        const url = document.location.href;
        if (url.includes("pubmed.ncbi.nlm.nih.gov")) {
            return pubMed();
        } else if (url.includes("nature.com")) {
            return nature();
        } else if (url.includes("tandfonline.com")) {
            return taylorFrancis();
        } else if (url.includes("www.sciencedirect.com")) {
            return sciencedirect();
        } else if (url.includes("eurekaselect.com")) {
            return eurekaSelect();
        } else if (url.includes("science.org")) {
            return science();
        } else if (url.includes("wiley.com")) {
            return wiley();
        } else if (url.includes("link.springer.com")) {
            return springerLink();
        } else if (url.includes("ieeexplore.ieee.org")) {
            return ieeexploreLink();
        }
        console.log("No SciHub support there")
    }

    setTimeout(() => {
        if (document.readyState == 'complete') {
            console.log("Freeing the science...")
            addSciHubLink()
        }
        return false
    }, 1000)

})()