feat: Fixing problems with generated code for golang and adding sample manifest for testing. (#22)

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## This PR
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Several small changes:
- Add sample manifest
- Fix integer parsing and generating for golang
- Small fixes for missing defaults in switches


### Related Issues
No issue - I've just tried to use the code to generate accessors

---------

Signed-off-by: Dominik Haska <[email protected]>
Co-authored-by: Dominik Haska <[email protected]>

Author: dominikhaska

sample/sample_manifest.json

@@ -0,0 +1,32 @@
+{
+  "flags": {
+    "enableFeatureA": {
+      "flagType": "boolean",
+      "defaultValue": false,
+      "description": "Controls whether Feature A is enabled."
+    },
+    "usernameMaxLength": {
+      "flagType": "integer",
+      "defaultValue": 50,
+      "description": "Maximum allowed length for usernames."
+    },
+    "greetingMessage": {
+      "flagType": "string",
+      "defaultValue": "Hello there!",
+      "description": "The message to use for greeting users."
+    },
+    "discountPercentage": {
+      "flagType": "float",
+      "defaultValue": 0.15,
+      "description": "Discount percentage applied to purchases."
+    },
+    "themeCustomization": {
+      "flagType": "object",
+      "defaultValue": {
+        "primaryColor": "#007bff",
+        "secondaryColor": "#6c757d"
+      },
+      "description": "Allows customization of theme colors."
+    }
+  }
+}

src/generators/golang/golang.go

@@ -1,12 +1,13 @@
 package golang
 
 import (
-	generator "codegen/src/generators"
 	_ "embed"
 	"sort"
 	"strconv"
 	"text/template"
 
+	generator "codegen/src/generators"
+
 	"github.com/iancoleman/strcase"
 )
 
@@ -63,8 +64,9 @@ func providerType(t generator.FlagType) string {
 		return "BooleanProvider"
 	case generator.StringType:
 		return "StringProvider"
+	default:
+		return ""
 	}
-	return ""
 }
 
 func flagAccessFunc(t generator.FlagType) string {
@@ -77,8 +79,9 @@ func flagAccessFunc(t generator.FlagType) string {
 		return "BooleanValue"
 	case generator.StringType:
 		return "StringValue"
+	default:
+		return ""
 	}
-	return ""
 }
 
 func supportImports(flags []*generator.FlagTmplData) []string {
@@ -106,7 +109,7 @@ func typeString(flagType generator.FlagType) string {
 	case generator.StringType:
 		return "string"
 	case generator.IntType:
-		return "int"
+		return "int64"
 	case generator.BoolType:
 		return "bool"
 	case generator.FloatType:

src/main.go

@@ -1,9 +1,6 @@
 package main
 
 import (
-	flagmanifest "codegen/docs/schema/v0"
-	generator "codegen/src/generators"
-	"codegen/src/generators/golang"
 	_ "embed"
 	"encoding/json"
 	"flag"
@@ -13,6 +10,10 @@ import (
 	"path"
 	"strconv"
 
+	flagmanifest "codegen/docs/schema/v0"
+	generator "codegen/src/generators"
+	"codegen/src/generators/golang"
+
 	jsonschema "github.com/santhosh-tekuri/jsonschema/v5"
 )
 
@@ -25,20 +26,25 @@ var stringToFlagType = map[string]generator.FlagType{
 	"boolean": generator.BoolType,
 	"float":   generator.FloatType,
 	"integer": generator.IntType,
+	"object":  generator.ObjectType,
 }
 
 func getDefaultValue(defaultValue interface{}, flagType generator.FlagType) string {
 	switch flagType {
 	case generator.BoolType:
 		return strconv.FormatBool(defaultValue.(bool))
 	case generator.IntType:
-		return strconv.FormatInt(defaultValue.(int64), 10)
+		//the conversion to float64 instead of integer typically occurs
+		//due to how JSON is parsed in Go. In Go's encoding/json package,
+		//all JSON numbers are unmarshaled into float64 by default when decoding into an interface{}.
+		return strconv.FormatFloat(defaultValue.(float64), 'g', -1, 64)
 	case generator.FloatType:
 		return strconv.FormatFloat(defaultValue.(float64), 'g', -1, 64)
 	case generator.StringType:
 		return defaultValue.(string)
+	default:
+		return ""
 	}
-	return ""
 }
 
 func unmarshalFlagManifest(data []byte, supportedFlagTypes map[generator.FlagType]bool) (*generator.BaseTmplData, error) {
@@ -100,6 +106,8 @@ func generate(gen generator.Generator) error {
 	return gen.Generate(input)
 }
 
+// command line params working example
+// -flag_manifest_path "sample/sample_manifest.json" -output_path "sample/golang/golang_sample.go"
 func main() {
 	flag.Parse()
 	_, filename := path.Split(*outputPath)

src/providers/providers.go

@@ -6,5 +6,5 @@ import (
 
 type BooleanProvider func(ctx context.Context) (bool, error)
 type FloatProvider func(ctx context.Context) (float64, error)
-type IntProvider func(ctx context.Context) (int, error)
+type IntProvider func(ctx context.Context) (int64, error)
 type StringProvider func(ctx context.Context) (string, error)