From a8d04f9eac8efe0c476b8958277595be3773fd46 Mon Sep 17 00:00:00 2001
From: danix <danix@danix.xyz>
Date: Tue, 28 Feb 2023 18:25:04 +0100
Subject: [PATCH] added search and contact form functionality. Needs styling
 and check for functionality.

---
 assets/js/contact.js                  | 50 ++++++++++++++
 assets/js/flexsearch.compact.js       | 27 ++++++++
 assets/js/search.js                   | 90 ++++++++++++++++++++++++
 layouts/home.searchindex.json         |  5 ++
 layouts/partials/footer-addition.html | 12 ++++
 layouts/shortcodes/contact.html       | 16 +++++
 layouts/shortcodes/search.html        | 22 ++++++
 static/php/contact.php                | 98 +++++++++++++++++++++++++++
 8 files changed, 320 insertions(+)
 create mode 100644 assets/js/contact.js
 create mode 100644 assets/js/flexsearch.compact.js
 create mode 100644 assets/js/search.js
 create mode 100644 layouts/home.searchindex.json
 create mode 100644 layouts/shortcodes/contact.html
 create mode 100644 layouts/shortcodes/search.html
 create mode 100644 static/php/contact.php

diff --git a/assets/js/contact.js b/assets/js/contact.js
new file mode 100644
index 0000000..020d0e7
--- /dev/null
+++ b/assets/js/contact.js
@@ -0,0 +1,50 @@
+/**
+ * @file
+ * A JavaScript file for the contact form.
+ */
+
+(function () {
+
+  'use strict';
+
+  const form = document.querySelector('.contact-form');
+  const button = form.querySelector('.form-submit');
+  const action = form.getAttribute('data-protect');
+  const body = document.querySelector('body');
+
+  function activateForm() {
+    form.setAttribute('action', action);
+    button.removeAttribute('disabled');
+  }
+
+  // Display the hidden form.
+  form.classList.remove('hidden');
+
+  // Wait for a mouse to move, indicating they are human.
+  body.addEventListener('mousemove', () => activateForm());
+  // Wait for a touch move event, indicating that they are human.
+  body.addEventListener('touchmove', () => activateForm());
+  // A tab or enter key pressed can also indicate they are human.
+  body.addEventListener('keydown', function (e) {
+    if ((e.key === 'Tab') || (e.key === 'Enter')) {
+      activateForm();
+    }
+  });
+
+  // Mark the form as submitted.
+  button.addEventListener('click', () => form.classList.add('js-submitted'));
+
+  // Display messages.
+  if (location.search.substring(1) !== '') {
+    switch (location.search.substring(1)) {
+      case 'submitted':
+        document.querySelector('.contact-submitted').classList.remove('hidden');
+        break;
+
+      case 'error':
+        document.querySelector('.contact-error').classList.remove('hidden');
+        break;
+    }
+  }
+
+})();
diff --git a/assets/js/flexsearch.compact.js b/assets/js/flexsearch.compact.js
new file mode 100644
index 0000000..c8d5508
--- /dev/null
+++ b/assets/js/flexsearch.compact.js
@@ -0,0 +1,27 @@
+/**!
+ * FlexSearch.js v0.7.31 (Compact)
+ * Copyright 2018-2022 Nextapps GmbH
+ * Author: Thomas Wilkerling
+ * Licence: Apache-2.0
+ * https://github.com/nextapps-de/flexsearch
+ */
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diff --git a/assets/js/search.js b/assets/js/search.js
new file mode 100644
index 0000000..e609fbe
--- /dev/null
+++ b/assets/js/search.js
@@ -0,0 +1,90 @@
+/* eslint-disable no-undef, guard-for-in */
+
+/**
+ * @file
+ * A JavaScript file for flexsearch.
+ */
+
+import * as params from '@params';
+
+(function () {
+
+  'use strict';
+
+  const index = new FlexSearch.Document({
+    document: {
+      id: 'id',
+      index: ['title','tags','content','date'],
+      store: ['title','summary','date','permalink']
+    },
+    tokenize: 'forward'
+  });
+
+  function showResults(items) {
+    const template = document.querySelector('template').content;
+    const fragment = document.createDocumentFragment();
+
+    const results = document.querySelector('.search-results');
+    results.textContent = '';
+
+    for (const id in items) {
+      const item = items[id];
+      const result = template.cloneNode(true);
+      const a = result.querySelector('a');
+      const time = result.querySelector('time');
+      const content = result.querySelector('.content');
+      a.innerHTML = item.title;
+      a.href = item.permalink;
+      time.innerText = item.date;
+      content.innerHTML = item.summary;
+      fragment.appendChild(result);
+    }
+    results.appendChild(fragment);
+  }
+
+  function doSearch() {
+    const query = document.querySelector('.search-text').value.trim();
+    const results = index.search({
+      query: query,
+      enrich: true,
+      limit: params.searchLimit
+    });
+    const items = {};
+    results.forEach(function (result) {
+      result.result.forEach(function (r) {
+        items[r.id] = r.doc;
+      });
+    });
+    showResults(items);
+  }
+
+  function enableUI() {
+    const searchform = document.querySelector('.search-form');
+    searchform.addEventListener('submit', function (e) {
+      e.preventDefault();
+      doSearch();
+    });
+    searchform.addEventListener('input', function () {
+      doSearch();
+    });
+    document.querySelector('.search-loading').classList.add('hidden');
+    document.querySelector('.search-input').classList.remove('hidden');
+    document.querySelector('.search-text').focus();
+  }
+
+  function buildIndex() {
+    document.querySelector('.search-loading').classList.remove('hidden');
+    fetch('/searchindex.json')
+      .then(function (response) {
+        return response.json();
+      })
+      .then(function (data) {
+        data.forEach(function (item) {
+          index.add(item);
+        });
+      });
+  }
+
+  buildIndex();
+  enableUI();
+})();
diff --git a/layouts/home.searchindex.json b/layouts/home.searchindex.json
new file mode 100644
index 0000000..b45ee56
--- /dev/null
+++ b/layouts/home.searchindex.json
@@ -0,0 +1,5 @@
+{{- $.Scratch.Add "searchindex" slice -}}
+{{- range $index, $element := where site.RegularPages "Params.exclude_search" nil -}}
+    {{- $.Scratch.Add "searchindex" (dict "id" $index "title" $element.Title "permalink" $element.RelPermalink "tags" (delimit ($element.Params.tags | default "") " ") "content" $element.Plain "summary" $element.Summary "date" ($element.Date.Format ($.Param "dateformat" | default "2 January, 2006"))) -}}
+{{- end -}}
+{{- $.Scratch.Get "searchindex" | jsonify -}}
diff --git a/layouts/partials/footer-addition.html b/layouts/partials/footer-addition.html
index faf4f7d..0148109 100644
--- a/layouts/partials/footer-addition.html
+++ b/layouts/partials/footer-addition.html
@@ -13,3 +13,15 @@
 <script type="text/javascript" src="{{ "js/util.js" | absURL }}"></script>
 <script type="text/javascript" src="{{ "js/main.js" | absURL }}"></script>
 
+{{ if .HasShortcode "contact" -}}
+{{ $contact := resources.Get "js/contact.js" | minify | fingerprint -}}
+<script defer src="{{ $contact.RelPermalink }}"></script>
+{{ end -}}
+
+{{ if .HasShortcode "search" -}}
+{{ $flexsearch := resources.Get "js/flexsearch.compact.js" | fingerprint -}}
+<script defer src="{{ $flexsearch.RelPermalink }}"></script>
+{{ $search_opts := dict "minify" true "params" (dict "searchLimit" (site.Params.searchLimit | default 20)) -}}
+{{ $search := resources.Get "js/search.js" | js.Build $search_opts | fingerprint -}}
+<script defer src="{{ $search.RelPermalink }}"></script>
+{{ end -}}
diff --git a/layouts/shortcodes/contact.html b/layouts/shortcodes/contact.html
new file mode 100644
index 0000000..21e23f3
--- /dev/null
+++ b/layouts/shortcodes/contact.html
@@ -0,0 +1,16 @@
+<p class="error message js-hidden">{{ i18n "js_required" }}</p>
+<p class="contact-submitted status message hidden">{{ i18n "contact_submitted" }}</p>
+<p class="contact-error error message hidden">{{ i18n "contact_error" }}</p>
+
+<form class="contact-form hidden" data-protect="/php/contact.php" action="#" method="post" accept-charset="UTF-8">
+  <label for="edit-name">{{ i18n "contact_name" }}</label>
+  <input type="text" id="edit-name" name="name" placeholder="{{ i18n "contact_name_placeholder" }}" required autofocus>
+  <label for="edit-mail">{{ i18n "contact_mail" }}</label>
+  <input type="email" id="edit-mail" name="email" placeholder="{{ i18n "contact_mail_placeholder" }}" required>
+  <input type="text" id="edit-url" class="hidden" name="url" placeholder="{{ i18n "contact_honeypot" }}">
+  <label for="edit-subject">{{ i18n "contact_subject" }}</label>
+  <input type="text" id="edit-subject" name="subject" placeholder="{{ i18n "contact_subject_placeholder" }}" required>
+  <label for="edit-message">{{ i18n "contact_message" }}</label>
+  <textarea id="edit-message" name="message" rows="5" placeholder="{{ i18n "contact_message_placeholder" }}" required></textarea>
+  <button type="submit" name="submit" class="form-submit" disabled>{{ i18n "contact_submit" }}</button>
+</form>
diff --git a/layouts/shortcodes/search.html b/layouts/shortcodes/search.html
new file mode 100644
index 0000000..784c598
--- /dev/null
+++ b/layouts/shortcodes/search.html
@@ -0,0 +1,22 @@
+<p class="error message js-hidden">{{ i18n "js_required" }}</p>
+<p class="search-loading status message hidden">{{ i18n "search_loading" }}</p>
+
+<div class="search-input hidden">
+  <form id="search-form" class="search-form" action="#" method="post" accept-charset="UTF-8" role="search">
+    <label for="query" class="visually-hidden">{{ i18n "search_title" }}</label>
+    <input type="search" id="query" name="query" class="search-text" placeholder="{{ i18n "search_placeholder" }}" maxlength="128">
+    <button type="submit" name="submit" class="form-submit" >{{ i18n "search_title" }}</button>
+  </form>
+</div>
+
+<div class="search-results"></div>
+
+<template>
+  <article class="search-result list-view">
+    <header>
+      <h2 class="title title-submitted"><a href="#">Title here</a></h2>
+      <div class="submitted"><time class="created-date">Date here</time></div>
+    </header>
+    <div class="content">Summary here</div>
+  </article>
+</template>
diff --git a/static/php/contact.php b/static/php/contact.php
new file mode 100644
index 0000000..0f3932b
--- /dev/null
+++ b/static/php/contact.php
@@ -0,0 +1,98 @@
+<?php
+
+// Set the e-mail address that submission should be sent to.
+$address = 'danix@danix.xyz';
+
+// Set the e-mail subject prefix.
+$prefix = 'Website feedback';
+
+// DO NOT EDIT ANYTHING BELOW UNLESS YOU KNOW WHAT YOU ARE DOING.
+
+$error = false;
+$success = false;
+
+// Check that the submission address is valid.
+if ((bool) filter_var(trim($address), FILTER_VALIDATE_EMAIL)) {
+  // Also set sender/return path header to this address to avoid SPF errors.
+  $to = $sender = trim($address);
+}
+else {
+  $error = true;
+}
+
+// Check that referer is local server.
+if (!isset($_SERVER['HTTP_REFERER']) || (parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST) != $_SERVER['SERVER_NAME'])) {
+  exit('Direct access not permitted');
+}
+
+// Check that this is a post request.
+if ($_SERVER['REQUEST_METHOD'] != 'POST' || empty($_POST)) {
+  $error = true;
+}
+
+// Check if fake url field is filled in, i.e. spam bot.
+if (!empty($_POST['url'])) {
+  $error = true;
+}
+
+// Check that e-mail address is valid.
+if ((bool) filter_var(trim($_POST['email']), FILTER_VALIDATE_EMAIL)) {
+  $email = trim($_POST['email']);
+}
+else {
+  $error = true;
+}
+
+if (!$error) {
+  // Construct the mail with headers.
+  $name = _contact_clean_str($_POST['name'], ENT_QUOTES, true, true);
+  $prefix = _contact_clean_str($prefix, ENT_NOQUOTES, true, true);
+  $subject = _contact_clean_str($_POST['subject'], ENT_NOQUOTES, true, true);
+  $subject = "[$prefix] $subject";
+  $message = _contact_clean_str($_POST['message'], ENT_NOQUOTES);
+  $lines = explode("\n", $message);
+  array_walk($lines, '_contact_ff_wrap');
+  $message = implode("\n", $lines);
+  $headers = [
+    'From'                      => "$name <$email>",
+    'Sender'                    => $sender,
+    'Return-Path'               => $sender,
+    'MIME-Version'              => '1.0',
+    'Content-Type'              => 'text/plain; charset=UTF-8; format=flowed; delsp=yes',
+    'Content-Transfer-Encoding' => '8Bit',
+    'X-Mailer'                  => 'Hugo - Zen',
+  ];
+  $mime_headers = [];
+  foreach ($headers as $key => $value) {
+    $mime_headers[] = "$key: $value";
+  }
+  $mail_headers = join("\n", $mime_headers);
+
+  // Send the mail, suppressing errors and setting Return-Path with the "-f" option.
+  $success = @mail($to, $subject, $message, $mail_headers, '-f' . $sender);
+}
+
+$status = $success ? 'submitted' : 'error';
+$contact_form_url = strtok($_SERVER['HTTP_REFERER'], '?');
+
+// Redirect back to contact form with status.
+header('Location: ' . $contact_form_url . '?' . $status, TRUE, 302);
+exit;
+
+function _contact_ff_wrap(&$line) {
+  $line = wordwrap($line, 72, "  \n");
+}
+
+function _contact_clean_str($str, $quotes, $strip = false, $encode = false) {
+  if ($strip) {
+    $str = strip_tags($str);
+  }
+
+  $str = htmlspecialchars(trim($str), $quotes, 'UTF-8');
+
+  if ($encode && preg_match('/[^\x20-\x7E]/', $str)) {
+    $str = '=?UTF-8?B?' . base64_encode($str) . '?=';
+  }
+
+  return $str;
+}
-- 
2.20.1