php: fetch: prices: coingecko: remove upstream client, add API key support

- Removes `codenixsv/coingecko-api`
- Adds Pro API support
- Related refactoring

container/src/finance/lib/internal/fetch/prices/internal/base.php

@@ -24,6 +24,7 @@
  */
 
 //! @since docker-finance 1.0.0
+
 namespace docker_finance\prices\internal
 {
     require_once('utils/utils.php');
@@ -138,15 +139,21 @@ namespace docker_finance\prices\internal
         /**
          * @brief Request's common implementation
          * @param string $url REST API URL
+         * @param array<string> $header Impl-specific header addendum
          * @return mixed Response data
          */
-        protected function request_impl(string $url): mixed
+        protected function request_impl(string $url, array $header): mixed
         {
             $headers = array(
               'Accept: application/json',
               'Content-Type: application/json',
             );
 
+            if (!empty($header)) {
+                $headers = array_merge($headers, $header);
+            }
+            utils\CLI::print_debug($headers);
+
             $ch = curl_init($url);
 
             curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
@@ -164,7 +171,15 @@ namespace docker_finance\prices\internal
                 utils\CLI::throw_fatal("cURL null response");
             }
 
-            return $response;
+            $decoded = json_decode(
+                $response,
+                true,
+                512,
+                JSON_PRETTY_PRINT
+            );
+            utils\CLI::print_debug($decoded);
+
+            return $decoded;
         }
 
         //! @brief Impl-specific REST API request

container/src/finance/lib/internal/fetch/prices/internal/prices/coingecko.php

@@ -24,9 +24,9 @@
  */
 
 //! @since docker-finance 1.0.0
+
 namespace docker_finance\prices\internal\prices\coingecko
 {
-    require_once('php/vendor/autoload.php');  //!< CoinGecko
     require_once('prices/internal/base.php');
     require_once('utils/utils.php');
 
@@ -39,13 +39,9 @@ namespace docker_finance\prices\internal\prices\coingecko
      */
     final class CoinGecko extends internal\Impl
     {
-        private \Codenixsv\CoinGeckoApi\CoinGeckoClient $api;  //!< CoinGecko
-
         public function __construct(utils\Env $env)
         {
             parent::__construct($env);
-
-            $this->api = new \Codenixsv\CoinGeckoApi\CoinGeckoClient();
         }
 
         /**
@@ -56,9 +52,27 @@ namespace docker_finance\prices\internal\prices\coingecko
          */
         protected function request(string $id, string $timestamp): mixed
         {
-            // TODO(afiore): use request_impl() after removing CoinGeckoClient
+            // If `key` exists, use Pro API (otherwise, use Public API)
-            $response = $this->api->coins()->getMarketChart($id, 'usd', $timestamp);
+            $key = $this->get_env()->get_env('API_PRICES_KEY');
-            return $response['prices'];
+            $domain = 'api.coingecko.com';
+            $header = [];
+            if ($key != 'None') {
+                $domain = 'pro-' . $domain;
+                $header = ["x-cg-pro-api-key: $key"];
+            }
+            $vs_currency = 'usd';
+            $url = "https://{$domain}/api/v3/coins/{$id}/market_chart?vs_currency={$vs_currency}&days={$timestamp}";
+
+            $response = $this->request_impl($url, $header);
+            if (array_key_exists('status', $response)) {
+                $status = $response['status'];
+                throw new \Exception($status['error_message'], $status['error_code']);
+            }
+
+            $prices = $response['prices'];
+            utils\CLI::print_debug($prices);
+
+            return $prices;
         }
 
         /**