Add TryGetObject/TryGetList and TryGetValue extensions for easier pattern matching

mythz · mythz · commit 349d1da1166b · 2025-10-11T12:29:59.000+08:00
diff --git a/ServiceStack/src/ServiceStack.AI.Chat/GoogleProvider.cs b/ServiceStack/src/ServiceStack.AI.Chat/GoogleProvider.cs
@@ -12,22 +12,18 @@ public string GeminiChatSummaryJson(Dictionary<string, object> geminiChat)
     {
         var origJson = JSON.stringify(geminiChat);
         var clone = (Dictionary<string,object>) JSON.parse(origJson);
-        if (clone.TryGetValue("contents", out var oContents)
-            && oContents is List<object> contents)
+        if (clone.TryGetList("contents", out var contents))
         {
             foreach (var oContent in contents)
             {
                 if (oContent is Dictionary<string, object> content
-                    && content.TryGetValue("parts", out var oParts)
-                    && oParts is List<object> parts)
+                    && content.TryGetList("parts", out var parts))
                 {
                     foreach (var oPart in parts)
                     {
                         if (oPart is Dictionary<string, object> part
-                            && part.TryGetValue("inline_data", out var oInlineData)
-                            && oInlineData is Dictionary<string, object> inlineData
-                            && inlineData.TryGetValue("data", out var oData)
-                            && oData is string data)
+                            && part.TryGetObject("inline_data", out var inlineData)
+                            && inlineData.TryGetValue<string>("data", out var data))
                         {
                             inlineData["data"] = $"({data.Length})";
                         }
diff --git a/ServiceStack/src/ServiceStack.Common/DictionaryExtensions.cs b/ServiceStack/src/ServiceStack.Common/DictionaryExtensions.cs
@@ -17,6 +17,27 @@ public static TValue GetValue<TValue, TKey>(this Dictionary<TKey, TValue> dictio
         return dictionary.TryGetValue(key, out var value) ? value : defaultValue();
     }
     
+    public static bool TryGetValue<T>(this Dictionary<string, object> dictionary, string key, out T value)
+    {
+        if (dictionary.TryGetValue(key, out var objValue) && objValue is T theValue)
+        {
+            value = theValue;
+            return true;
+        }
+        value = default;
+        return false;
+    }
+    
+    public static bool TryGetObject(this Dictionary<string, object> dictionary, string key, out Dictionary<string, object> value)
+    {
+        return TryGetValue(dictionary, key, out value);
+    }
+    
+    public static bool TryGetList(this Dictionary<string, object> dictionary, string key, out List<object> value)
+    {
+        return TryGetValue(dictionary, key, out value);
+    }
+    
     public static bool IsNullOrEmpty(this IDictionary dictionary)
     {
         return dictionary == null || dictionary.Count == 0;

Original file line number	Diff line number	Diff line change
`@@ -12,22 +12,18 @@ public string GeminiChatSummaryJson(Dictionary<string, object> geminiChat)`
`12`	`12`	`{`
`13`	`13`	`var origJson = JSON.stringify(geminiChat);`
`14`	`14`	`var clone = (Dictionary<string,object>) JSON.parse(origJson);`
`15`		`- if (clone.TryGetValue("contents", out var oContents)`
`16`		`- && oContents is List<object> contents)`
	`15`	`+ if (clone.TryGetList("contents", out var contents))`
`17`	`16`	`{`
`18`	`17`	`foreach (var oContent in contents)`
`19`	`18`	`{`
`20`	`19`	`if (oContent is Dictionary<string, object> content`
`21`		`- && content.TryGetValue("parts", out var oParts)`
`22`		`- && oParts is List<object> parts)`
	`20`	`+ && content.TryGetList("parts", out var parts))`
`23`	`21`	`{`
`24`	`22`	`foreach (var oPart in parts)`
`25`	`23`	`{`
`26`	`24`	`if (oPart is Dictionary<string, object> part`
`27`		`- && part.TryGetValue("inline_data", out var oInlineData)`
`28`		`- && oInlineData is Dictionary<string, object> inlineData`
`29`		`- && inlineData.TryGetValue("data", out var oData)`
`30`		`- && oData is string data)`
	`25`	`+ && part.TryGetObject("inline_data", out var inlineData)`
	`26`	`+ && inlineData.TryGetValue<string>("data", out var data))`
`31`	`27`	`{`
`32`	`28`	`inlineData["data"] = $"({data.Length})";`
`33`	`29`	`}`