mernmail-website/app/(root)/privacy/page.jsx

"use client";
import ReactMarkdown from "react-markdown";
import { privacyPolicy } from "@/constants/guidelines";
import { useEffect } from "react";

function matomoOptOutPlugin() {
  return (tree) => {
    const paragraph = tree.children.find(
      (node) =>
        node.type === "element" &&
        node.tagName == "p" &&
        node.children[0].value === "MATOMOOPTOUT"
    );

    if (paragraph) {
      const div = {
        type: "element",
        tagName: "div",
        properties: {
          id: "matomo-opt-out"
        },
        children: []
      };

      tree.children.splice(tree.children.indexOf(paragraph), 1, div);
    }
  };
}

function Contribute() {
  useEffect(() => {
    const settings = {
      showIntro: true,
      divId: "matomo-opt-out",
      useSecureCookies: true,
      cookiePath: null,
      cookieDomain: null,
      cookieSameSite: "Lax",
      OptOutComplete:
        "Opt-out complete; your visits to this website will not be recorded by the Web Analytics tool.",
      OptOutCompleteBis:
        "Note that if you clear your cookies, delete the opt-out cookie, or if you change computers or Web browsers, you will need to perform the opt-out procedure again.",
      YouMayOptOut2:
        "You may choose to prevent this website from aggregating and analyzing the actions you take here.",
      YouMayOptOut3:
        "Doing so will protect your privacy, but will also prevent the owner from learning from your actions and creating a better experience for you and other users.",
      OptOutErrorNoCookies:
        "The tracking opt-out feature requires cookies to be enabled.",
      OptOutErrorNotHttps:
        "The tracking opt-out feature may not work because this site was not loaded over HTTPS. Please reload the page to check if your opt out status changed.",
      YouAreNotOptedOut: "You are not opted out.",
      UncheckToOptOut: "Uncheck this box to opt-out.",
      YouAreOptedOut: "You are currently opted out.",
      CheckToOptIn: "Check this box to opt-in."
    };

    window.showContent = function (
      consent,
      errorMessage = null,
      useTracker = false
    ) {
      const errorBlock = '<p style="color: red; font-weight: bold;">';

      const div = document.getElementById(settings.divId);
      if (!div) {
        const warningDiv = document.createElement("div");
        const msg = `Unable to find opt-out content div: "${settings.divId}"`;
        warningDiv.id = `${settings.divId}-warning`;
        warningDiv.innerHTML = `${errorBlock}${msg}</p>`;
        document.body.insertBefore(warningDiv, document.body.firstChild);
        console.log(msg);
        return;
      }

      if (!navigator || !navigator.cookieEnabled) {
        div.innerHTML = `${errorBlock}${settings.OptOutErrorNoCookies}</p>`;
        return;
      }

      if (errorMessage !== null) {
        div.innerHTML = `${errorBlock}${errorMessage}</p>`;
        return;
      }

      let content = "";

      if (location.protocol !== "https:") {
        content += `${errorBlock}${settings.OptOutErrorNotHttps}</p>`;
      }

      if (consent) {
        if (settings.showIntro) {
          content += `<p>${settings.YouMayOptOut2} ${settings.YouMayOptOut3}</p>`;
        }
        if (useTracker) {
          content +=
            '<input onclick="_paq.push([\'optUserOut\']);showContent(false, null, true);" id="trackVisits" type="checkbox" checked="checked" />';
        } else {
          content +=
            '<input onclick="window.MatomoConsent.consentRevoked();showContent(false);" id="trackVisits" type="checkbox" checked="checked" />';
        }
        content += `<label for="trackVisits"><strong><span>${settings.YouAreNotOptedOut} ${settings.UncheckToOptOut}</span></strong></label>`;
      } else {
        if (settings.showIntro) {
          content += `<p>${settings.OptOutComplete} ${settings.OptOutCompleteBis}</p>`;
        }
        if (useTracker) {
          content +=
            '<input onclick="_paq.push([\'forgetUserOptOut\']);showContent(true, null, true);" id="trackVisits" type="checkbox" />';
        } else {
          content +=
            '<input onclick="window.MatomoConsent.consentGiven();showContent(true);" id="trackVisits" type="checkbox" />';
        }
        content += `<label for="trackVisits"><strong><span>${settings.YouAreOptedOut} ${settings.CheckToOptIn}</span></strong></label>`;
      }
      div.innerHTML = content;
    };

    window.MatomoConsent = {
      cookiesDisabled: !navigator || !navigator.cookieEnabled,
      CONSENT_COOKIE_NAME: "mtm_consent",
      CONSENT_REMOVED_COOKIE_NAME: "mtm_consent_removed",
      cookieIsSecure: false,
      useSecureCookies: true,
      cookiePath: "",
      cookieDomain: "",
      cookieSameSite: "Lax",
      init: function (
        useSecureCookies,
        cookiePath,
        cookieDomain,
        cookieSameSite
      ) {
        this.useSecureCookies = useSecureCookies;
        this.cookiePath = cookiePath;
        this.cookieDomain = cookieDomain;
        this.cookieSameSite = cookieSameSite;
        if (useSecureCookies && location.protocol !== "https:") {
          console.log(
            "Error with setting useSecureCookies: You cannot use this option on http."
          );
        } else {
          this.cookieIsSecure = useSecureCookies;
        }
      },
      hasConsent: function () {
        const consentCookie = this.getCookie(this.CONSENT_COOKIE_NAME);
        const removedCookie = this.getCookie(this.CONSENT_REMOVED_COOKIE_NAME);
        if (!consentCookie && !removedCookie) {
          return true; // No cookies set, so opted in
        }
        if (removedCookie && consentCookie) {
          this.setCookie(this.CONSENT_COOKIE_NAME, "", -129600000);
          return false;
        }
        return consentCookie || consentCookie !== 0;
      },
      consentGiven: function () {
        this.setCookie(this.CONSENT_REMOVED_COOKIE_NAME, "", -129600000);
        this.setCookie(
          this.CONSENT_COOKIE_NAME,
          new Date().getTime(),
          946080000000
        );
      },
      consentRevoked: function () {
        this.setCookie(this.CONSENT_COOKIE_NAME, "", -129600000);
        this.setCookie(
          this.CONSENT_REMOVED_COOKIE_NAME,
          new Date().getTime(),
          946080000000
        );
      },
      getCookie: function (cookieName) {
        const cookiePattern = new RegExp("(^|;)[ ]*" + cookieName + "=([^;]*)");
        const cookieMatch = cookiePattern.exec(document.cookie);
        return cookieMatch ? window.decodeURIComponent(cookieMatch[2]) : 0;
      },
      setCookie: function (cookieName, value, msToExpire) {
        const expiryDate = new Date();
        expiryDate.setTime(new Date().getTime() + msToExpire);
        document.cookie =
          cookieName +
          "=" +
          window.encodeURIComponent(value) +
          (msToExpire ? ";expires=" + expiryDate.toGMTString() : "") +
          ";path=" +
          (this.cookiePath || "/") +
          (this.cookieDomain ? ";domain=" + this.cookieDomain : "") +
          (this.cookieIsSecure ? ";secure" : "") +
          ";SameSite=" +
          this.cookieSameSite;
        if (
          (!msToExpire || msToExpire >= 0) &&
          this.getCookie(cookieName) !== String(value)
        ) {
          console.log(
            `There was an error setting cookie \`${cookieName}\`. Please check domain and path.`
          );
        }
      }
    };

    window.MatomoConsent.init(
      settings.useSecureCookies,
      settings.cookiePath,
      settings.cookieDomain,
      settings.cookieSameSite
    );
    showContent(window.MatomoConsent.hasConsent());
  }, []);

  return (
    <main className="max-w-screen-xl mx-auto px-4 py-6 md:py-28 gap-2 flex flex-col">
      <h1 className="text-3xl md:text-5xl pb-1 md:pb-2 font-bold">
        Privacy Policy
      </h1>
      <p className="md:text-lg text-muted-foreground text-start mb-6">
        Effective date: November 7, 2024
      </p>
      <div className="prose prose-a:text-primary max-w-full md:prose-lg dark:prose-invert">
        <ReactMarkdown rehypePlugins={[matomoOptOutPlugin]}>
          {privacyPolicy}
        </ReactMarkdown>
      </div>
    </main>
  );
}

export default Contribute;