fix: strongly type symbol for market data and quote

app/Interfaces/MarketData/AlphaVantageMarketData.php

@@ -18,7 +18,15 @@ class AlphaVantageMarketData implements MarketDataInterface
     public function exists(string $symbol): bool
     {
 
-        return $this->quote($symbol)->isNotEmpty();
+        try {
+            $this->quote($symbol);
+
+            return true;
+
+        } catch (\Throwable $e) {
+
+            return false;
+        }
     }
 
     public function quote(string $symbol): Quote
@@ -26,10 +34,6 @@ class AlphaVantageMarketData implements MarketDataInterface
         $quote = Alphavantage::core()->quoteEndpoint($symbol);
         $quote = Arr::get($quote, 'Global Quote', []);
 
-        if (empty($quote)) {
-            return new Quote;
-        }
-
         $fundamental = cache()->remember(
             'av-symbol-'.$symbol,
             1440,

app/Interfaces/MarketData/FallbackInterface.php

@@ -20,6 +20,7 @@ class FallbackInterface
             $provider = trim($provider);
 
             try {
+                Log::warning("Calling method {$method} ({$provider})");
 
                 if (! in_array($provider, array_keys(config('investbrain.interfaces', [])))) {
 

app/Interfaces/MarketData/FinnhubMarketData.php

@@ -28,17 +28,21 @@ class FinnhubMarketData implements MarketDataInterface
     public function exists(string $symbol): bool
     {
 
-        return $this->quote($symbol)->isNotEmpty();
+        try {
+            $this->quote($symbol);
+
+            return true;
+
+        } catch (\Throwable $e) {
+
+            return false;
+        }
     }
 
     public function quote(string $symbol): Quote
     {
         $quote = $this->client->quote($symbol);
 
-        if (empty($quote)) {
-            return new Quote;
-        }
-
         $fundamental = cache()->remember(
             'fh-symbol-'.$symbol,
             1440,

app/Interfaces/MarketData/Types/Quote.php

@@ -9,7 +9,7 @@ use Illuminate\Support\Carbon;
 
 class Quote extends MarketDataType
 {
-    public function setName($name): self
+    public function setName(string $name): self
     {
         $this->items['name'] = (string) $name;
 
@@ -21,7 +21,7 @@ class Quote extends MarketDataType
         return $this->items['name'] ?? '';
     }
 
-    public function setSymbol($symbol): self
+    public function setSymbol(string $symbol): self
     {
         $this->items['symbol'] = (string) $symbol;
 

app/Interfaces/MarketData/YahooMarketData.php

@@ -26,7 +26,15 @@ class YahooMarketData implements MarketDataInterface
     public function exists(string $symbol): bool
     {
 
-        return $this->quote($symbol)->isNotEmpty();
+        try {
+            $this->quote($symbol);
+
+            return true;
+
+        } catch (\Throwable $e) {
+
+            return false;
+        }
     }
 
     public function quote(string $symbol): Quote
@@ -34,8 +42,8 @@ class YahooMarketData implements MarketDataInterface
 
         $quote = $this->client->getQuote($symbol);
 
-        if (empty($quote)) {
-            return collect();
+        if (is_null($quote)) {
+            throw new \Exception('Symbol ('.$symbol.') does not exist');
         }
 
         return new Quote([