initial working commit

Controllers/kagiSummarizerController.php

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+<?php
+
+class FreshExtension_kagiSummarizer_Controller extends Minz_ActionController {
+  public function summarizeAction() {
+    $this->view->_layout(false);
+
+    $kagi_token = FreshRSS_Context::$user_conf->kagi_token;
+
+    if ($kagi_token === null || trim($kagi_token) ==='') {
+      echo json_encode(array(
+        'response' => array(
+          'output_text' => _t('ext.kagiSummarizer.ui.no_token_configured'),
+          'error' => 'configuration'),
+        'status' => 200));
+      return;
+    }
+
+    $entry_id = Minz_Request::param('id');
+    $entry_dao = FreshRSS_Factory::createEntryDao();
+    $entry = $entry_dao->searchById($entry_id);
+
+    if ($entry === null) {
+      echo json_encode(array('status' => 404));
+      return;
+    }
+
+    $entry_link = urlencode($entry->link());
+    $url = 'https://kagi.com/mother/summary_labs?summary_type=summary&url=' . $entry_link;
+
+    $curl = curl_init();
+    curl_setopt($curl, CURLOPT_URL, $url);
+    curl_setopt($curl, CURLOPT_HTTPHEADER, array(
+      'Content-Type: application/json; charset=UTF-8',
+      'Authorization: ' . $kagi_token
+    ));
+    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+    curl_setopt($curl, CURLOPT_HEADER, true);
+
+    $response = curl_exec($curl);
+    $header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
+    $response_body = substr($response, $header_size);
+
+    echo json_encode(array(
+      'response' => json_decode($response_body),
+      'status' => curl_getinfo($curl, CURLINFO_HTTP_CODE)
+    ));
+  }
+}

configure.phtml

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+<?php
+  $kagi_token = FreshRSS_Context::$user_conf->kagi_token;
+?>
+
+<form action="<?php echo _url('extension', 'configure', 'e', urlencode($this->getName())); ?>" method="post">
+  <input type="hidden" name="_csrf" value="<?php echo FreshRSS_Auth::csrfToken(); ?>" />
+  <p><?php echo _t('ext.kagiSummarizer.configure.kagi_token_help'); ?></p>
+  <div class="form-group">
+    <label class="group-name" for="kagi_token"><?php echo _t('ext.kagiSummarizer.configure.kagi_token'); ?></label>
+    <div class="group-controls">
+      <input type="text" name="kagi_token" id="kagi_token" value="<?php echo $kagi_token; ?>">
+    </div>
+  </div>
+  <div class="form-group form-actions">
+    <div class="group-controls">
+      <button type="submit" class="btn btn-important"><?php echo _t('gen.action.submit'); ?></button>
+    </div>
+  </div>
+</form>

extension.php

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+<?php
+
+class KagiSummarizerExtension extends Minz_Extension {
+  public function init() {
+    $this->registerTranslates();
+    $this->registerHook('entry_before_display', [$this, 'addSummarizeButton']);
+    Minz_View::appendScript($this->getFileUrl('script.js', 'js'), false, false, false);
+    $this->registerController('kagiSummarizer');
+  }
+
+  public function handleConfigureAction() {
+    $this->registerTranslates();
+
+    if (Minz_Request::isPost()) {
+      $kagi_token = Minz_Request::param('kagi_token', '');
+      $prefix = 'https://kagi.com/search?token=';
+      if (substr($kagi_token, 0, strlen($prefix)) == $prefix) {
+        $kagi_token = substr($kagi_token, strlen($prefix));
+      }
+      FreshRSS_Context::$user_conf->kagi_token = $kagi_token;
+      FreshRSS_Context::$user_conf->save();
+    }
+  }
+
+  public function addSummarizeButton(FreshRSS_Entry $entry): FreshRSS_Entry {
+    $this->registerTranslates();
+    $url = Minz_Url::display(array(
+      'c' => 'kagiSummarizer',
+      'a' => 'summarize',
+      'params' => array(
+        'id' => $entry->id()
+    )));
+    $entry->_content('<p class="kagi-summary"><a data-loading="' . htmlspecialchars(_t('ext.kagiSummarizer.ui.loading_summary')) . '" data-error="' . htmlspecialchars(_t('ext.kagiSummarizer.ui.error')) . '" class="btn" href="' . $url .'">' . _t('ext.kagiSummarizer.ui.summarize_button') . '</a></p>' . $entry->content());
+    return $entry;
+  }
+}

i18n/en/ext.php

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+<?php
+
+return array(
+  'kagiSummarizer' => array(
+    'configure' => array(
+      'kagi_token' => 'Kagi Token',
+      'kagi_token_help' => 'Copy and paste the "Session Link" from your <a href="https://kagi.com/settings?p=user_details" target="_blank">Kagi Account</a> settings.'
+    ),
+    'ui' => array(
+      'summarize_button' => 'Summarize',
+      'loading_summary' => 'Loading summary...',
+      'error' => 'Error retrieving summary.',
+      'no_token_configured' => 'No Kagi token configured.'
+    )
+  )
+);

metadata.json

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+{
+  "name": "Kagi Summarizer",
+  "author": "Rudis Muiznieks",
+  "description": "Add a button to summarize articles with the Kagi Universal Summarizer.",
+  "version": 0.1,
+  "entrypoint": "KagiSummarizer",
+  "type": "user"
+}

static/script.js

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+if (document.readyState && document.readyState !== 'loading') {
+  configureSummarizeButtons();
+} else {
+  document.addEventListener('DOMContentLoaded', configureSummarizeButtons, false);
+}
+
+function configureSummarizeButtons() {
+  document.getElementById('global').addEventListener('click', function(e) {
+    for (var target = e.target; target && target != this; target = target.parentNode) {
+      if (target.matches('.kagi-summary a.btn')) {
+        e.preventDefault();
+        e.stopPropagation();
+        if (target.href) {
+          summarizeButtonClick(target);
+        }
+        break;
+      }
+    }
+  }, false);
+}
+
+function summarizeButtonClick(button) {
+  var url = button.href;
+  var loadingMsg = button.dataset.loading;
+  var errorMsg = button.dataset.error;
+  var container = button.parentNode;
+
+  container.classList.add('alert');
+  container.classList.add('alert-warn');
+  container.innerHTML = loadingMsg;
+
+  var request = new XMLHttpRequest();
+  request.open('POST', url, true);
+  request.responseType = 'json';
+
+  request.onload = function(e) {
+    if (this.status != 200) {
+      return request.onerror(e);
+    }
+
+    var response = xmlHttpRequestJson(this);
+    if (!response) {
+      return request.onerror(e);
+    }
+
+    if (response.status !== 200 || !response.response || !response.response.output_text) {
+      return request.onerror(e);
+    }
+
+    if (response.response.error) {
+      container.classList.remove('alert-warn');
+      container.classList.add('alert-error');
+    } else {
+      container.classList.remove('alert-warn');
+      container.classList.add('alert-success');
+    }
+
+    container.innerHTML = response.response.output_text;
+  }
+
+  request.onerror = function(e) {
+    badAjax(this.status == 403);
+    container.classList.remove('alert-warn');
+    container.classList.add('alert-error');
+    container.innerHTML = errorMsg;
+  }
+
+  request.setRequestHeader('Content-Type', 'application/json');
+  request.send(JSON.stringify({
+    ajax: true,
+    _csrf: context.csrf
+  }));
+}