From 1c2a51394b8519c84d5ffab296a07da53ae273e8 Mon Sep 17 00:00:00 2001
From: Tanguy Pruvot <tanguy.pruvot@gmail.com>
Date: Mon, 10 Sep 2018 06:58:33 +0200
Subject: [PATCH] exchange: handle crex24 public api

---
 web/yaamp/core/backend/markets.php   | 61 +++++++++++++++++++++++++++-
 web/yaamp/core/backend/rawcoins.php  | 18 +++++++-
 web/yaamp/core/exchange/crex24.php   | 26 ++++++++++++
 web/yaamp/core/exchange/exchange.php |  3 ++
 4 files changed, 105 insertions(+), 3 deletions(-)
 create mode 100644 web/yaamp/core/exchange/crex24.php

diff --git a/web/yaamp/core/backend/markets.php b/web/yaamp/core/backend/markets.php
index b9a332f87..fa4c60b78 100644
--- a/web/yaamp/core/backend/markets.php
+++ b/web/yaamp/core/backend/markets.php
@@ -20,6 +20,7 @@ function BackendPricesUpdate()
 	updateKrakenMarkets();
 	updateKuCoinMarkets();
 	updateCCexMarkets();
+	updateCrex24Markets();
 	updateCryptopiaMarkets();
 	updateHitBTCMarkets();
 	updateYobitMarkets();
@@ -975,7 +976,65 @@ function updateAlcurexMarkets()
 					$coin->price2 = $market->price2;
 					$coin->save();
 				}
-//				debuglog("alcurex: $pair $market->price ".bitcoinvaluetoa($market->price2));
+				//debuglog("$exchange: $pair price updated to {$market->price}");
+				break;
+			}
+		}
+	}
+}
+
+function updateCrex24Markets()
+{
+	$exchange = 'crex24';
+	if (exchange_get($exchange, 'disabled')) return;
+
+	$list = getdbolist('db_markets', "name LIKE '$exchange%'");
+	if (empty($list)) return;
+
+	$data = crex24_api_query('tickers');
+	if(!is_array($data)) return;
+
+	foreach($list as $market)
+	{
+		$coin = getdbo('db_coins', $market->coinid);
+		if(!$coin) continue;
+
+		$symbol = $coin->getOfficialSymbol();
+		$pair = strtoupper($symbol).'-BTC';
+
+		$sqlFilter = '';
+		if (!empty($market->base_coin)) {
+			$pair = strtoupper($symbol.'-'.$market->base_coin);
+			$sqlFilter = "AND base_coin='{$market->base_coin}'";
+		}
+
+		if (market_get($exchange, $symbol, "disabled")) {
+			$market->disabled = 1;
+			$market->message = 'disabled from settings';
+			$market->save();
+			continue;
+		}
+
+		foreach ($data as $ticker) {
+			if ($ticker->instrument === $pair) {
+				if ($market->disabled < 9) {
+					$nbm = (int) dboscalar("SELECT COUNT(id) FROM markets WHERE coinid={$coin->id} $sqlFilter");
+					$market->disabled = ($ticker->bid < $ticker->ask/2) && ($nbm > 1);
+				}
+
+				$price2 = ($ticker->bid+$ticker->ask)/2;
+				$market->price2 = AverageIncrement($market->price2, $price2);
+				$market->price = AverageIncrement($market->price, $ticker->bid);
+				$market->pricetime = time(); // $ticker->timestamp "2018-08-31T12:48:56Z"
+				$market->save();
+
+				if (empty($coin->price) && $ticker->ask) {
+					$coin->price = $market->price;
+					$coin->price2 = $price2;
+					$coin->save();
+				}
+				//debuglog("$exchange: $pair price updated to {$market->price}");
+				break;
 			}
 		}
 	}
diff --git a/web/yaamp/core/backend/rawcoins.php b/web/yaamp/core/backend/rawcoins.php
index 70de461f0..2515a4063 100644
--- a/web/yaamp/core/backend/rawcoins.php
+++ b/web/yaamp/core/backend/rawcoins.php
@@ -38,7 +38,7 @@ function updateRawcoins()
 
 	if (!exchange_get('bitz', 'disabled')) {
 		$list = bitz_api_query('tickerall');
-
+		if (!empty($list)) {
 			dborun("UPDATE markets SET deleted=true WHERE name='bitz'");
 			foreach($list as $c => $ticker) {
 				$e = explode('_', $c);
@@ -47,6 +47,7 @@ function updateRawcoins()
 				$symbol = strtoupper($e[0]);
 				updateRawCoin('bitz', $symbol);
 			}
+		}
 	}
 
 	if (!exchange_get('bleutrade', 'disabled')) {
@@ -64,6 +65,19 @@ function updateRawcoins()
 		}
 	}
 
+	if (!exchange_get('crex24', 'disabled')) {
+		$list = crex24_api_query('currencies');
+		if(is_array($list) && !empty($list)) {
+			dborun("UPDATE markets SET deleted=true WHERE name='crex24'");
+			foreach ($list as $currency) {
+				$symbol = objSafeVal($currency, 'symbol');
+				$name = objSafeVal($currency, 'name');
+				if ($currency->isFiat || $currency->isDelisted) continue;
+				updateRawCoin('crex24', $symbol, $name);
+			}
+		}
+	}
+
 	if (!exchange_get('poloniex', 'disabled')) {
 		$poloniex = new poloniex;
 		$tickers = $poloniex->get_currencies();
@@ -436,7 +450,7 @@ function updateRawCoin($marketname, $symbol, $name='unknown')
 		}
 
 		// some other to ignore...
-		if (in_array($marketname, array('yobit','kucoin','tradesatoshi')))
+		if (in_array($marketname, array('crex24','yobit','kucoin','tradesatoshi')))
 			return;
 
 		if (market_get($marketname, $symbol, "disabled")) {
diff --git a/web/yaamp/core/exchange/crex24.php b/web/yaamp/core/exchange/crex24.php
new file mode 100644
index 000000000..2808ef49d
--- /dev/null
+++ b/web/yaamp/core/exchange/crex24.php
@@ -0,0 +1,26 @@
+<?php
+
+// https://docs.crex24.com/trade-api/v2/
+// https://api.crex24.com/v2/public/currencies
+
+function crex24_api_query($method, $params='', $returnType='object')
+{
+	$uri = "https://api.crex24.com/v2/public/{$method}";
+	if (!empty($params)) $uri .= "?{$params}";
+
+	$ch = curl_init($uri);
+	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+	curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
+	curl_setopt($ch, CURLOPT_TIMEOUT, 30);
+	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+
+	$execResult = strip_tags(curl_exec($ch));
+
+	if ($returnType == 'object')
+		$ret = json_decode($execResult);
+	else
+		$ret = json_decode($execResult,true);
+
+	return $ret;
+}
+
diff --git a/web/yaamp/core/exchange/exchange.php b/web/yaamp/core/exchange/exchange.php
index 2cad682ea..53ce0e492 100644
--- a/web/yaamp/core/exchange/exchange.php
+++ b/web/yaamp/core/exchange/exchange.php
@@ -19,6 +19,7 @@ function strip_data($data)
 require_once("bleutrade.php");
 require_once("ccexapi.php");
 require_once("cexio.php");
+require_once("crex24.php");
 require_once("cryptobridge.php");
 require_once("gateio.php");
 require_once("graviex.php");
@@ -97,6 +98,8 @@ function getMarketUrl($coin, $marketName)
 		$url = "https://www.coinexchange.io/market/{$symbol}/{$base}";
 	else if($market == 'coinsmarkets')
 		$url = "https://coinsmarkets.com/trade-{$base}-{$symbol}.htm";
+	else if($market == 'crex24')
+		$url = "https://crex24.com/exchange/{$symbol}-{$base}";
 	else if($market == 'cryptobridge')
 		$url = "https://wallet.crypto-bridge.org/market/BRIDGE.{$symbol}_BRIDGE.{$base}";
 	else if($market == 'cryptohub')