feat: Enhance variables.tf.tmpl to support all Terraform variable types

- Added support for primitive types: string, number, bool
- Added support for complex types: list, set, map, object, tuple, any
- Included handling for default values and sensitive attributes
- Added validation block for custom validation rules

Author: Samyak Rout

infra_as_code/terraform_generator/backend/models/config.go

@@ -55,4 +55,10 @@ type Variable struct {
 	Default     interface{} `json:"default,omitempty"`
 	Sensitive   bool        `json:"sensitive,omitempty"`
 	Value       interface{} `json:"value,omitempty"`
+	Validation  *Validation `json:"validation,omitempty"` // Add Validation field
+}
+
+type Validation struct {
+	Condition    string `json:"condition"`
+	ErrorMessage string `json:"error_message"`
 }

infra_as_code/terraform_generator/backend/services/terraform_service.go

@@ -64,6 +64,7 @@ func generateModuleFiles(basePath string, modules []models.Module, provider stri
 			return err
 		}
 
+		// Prepare data for templates
 		data := map[string]interface{}{
 			"Module":          module,
 			"ResourceName":    module.ModuleName,

infra_as_code/terraform_generator/backend/templates/azure/resource_group/variables.tf.tmpl

@@ -8,5 +8,11 @@ variable "{{ $name }}" {
   {{- if $var.Sensitive }}
   sensitive   = true
   {{- end }}
+  {{- if $var.Validation }}
+  validation {
+    condition     = {{ $var.Validation.Condition }}
+    error_message = "{{ $var.Validation.ErrorMessage }}"
+  }
+  {{- end }}
 }
 {{- end }}

infra_as_code/terraform_generator/backend/templates/azure/vnet/variables.tf.tmpl

@@ -8,5 +8,11 @@ variable "{{ $name }}" {
   {{- if $var.Sensitive }}
   sensitive   = true
   {{- end }}
+  {{- if $var.Validation }}
+  validation {
+    condition     = {{ $var.Validation.Condition }}
+    error_message = "{{ $var.Validation.ErrorMessage }}"
+  }
+  {{- end }}
 }
 {{- end }}

infra_as_code/terraform_generator/backend/templates/generic/variables.tf.tmpl

@@ -8,5 +8,11 @@ variable "{{ $name }}" {
   {{- if $var.Sensitive }}
   sensitive   = true
   {{- end }}
+  {{- if $var.Validation }}
+  validation {
+    condition     = {{ $var.Validation.Condition }}
+    error_message = "{{ $var.Validation.ErrorMessage }}"
+  }
+  {{- end }}
 }
 {{- end }}

infra_as_code/terraform_generator/backend/utils/terraform_utils.go

@@ -70,3 +70,18 @@ func ResolveModuleDependencies(requestedModules []string, availableModules []mod
 
 	return resolved, nil
 }
+
+// ExtractModuleVariables processes the module variables for a given module.
+func ExtractModuleVariables(module models.Module) map[string]interface{} {
+	variables := make(map[string]interface{})
+	for name, varDef := range module.Variables {
+		variables[name] = map[string]interface{}{
+			"description": varDef.Description,
+			"type":        varDef.Type,
+			"default":     varDef.Default,
+			"sensitive":   varDef.Sensitive,
+			"validation":  varDef.Validation,
+		}
+	}
+	return variables
+}