Add basic Kotlin template

Author: svix-jplatte

src/api.rs

@@ -107,7 +107,7 @@ impl Api {
 
         for (name, resource) in self.resources {
             let basename = match tpl_file_ext {
-                "cs" | "java" | "kotlin" => name.to_upper_camel_case(),
+                "cs" | "java" | "kt" => name.to_upper_camel_case(),
                 _ => name.to_snake_case(),
             };
 

src/template.rs

@@ -31,7 +31,7 @@ pub(crate) fn env() -> Result<minijinja::Environment<'static>, minijinja::Error>
             kwargs.assert_all_used()?;
 
             let prefix = match &*style {
-                "javascript" | "js" | "ts" | "typescript" => {
+                "java" | "kotlin" | "javascript" | "js" | "ts" | "typescript" => {
                     if !s.contains("\n") {
                         return Ok(format!("/** {s} */"));
                     }

src/types.rs

@@ -106,7 +106,8 @@ impl FieldType {
     fn to_kotlin_typename(&self) -> Cow<'_, str> {
         match self {
             Self::Bool => "Boolean".into(),
-            Self::UInt64 => "Long".into(),
+            // FIXME: Should be Long..
+            Self::UInt64 => "Int".into(),
             Self::String => "String".into(),
             Self::DateTime => "OffsetDateTime".into(),
             Self::Set(field_type) => format!("List<{}>", field_type.to_kotlin_typename()).into(),

templates/svix_lib_resource.kt.jinja

@@ -0,0 +1,36 @@
+// this file is @generated
+{% set resource_type_name = resource.name | to_upper_camel_case -%}
+{% set api_type_name %}{{ resource_type_name }}Api{% endset -%}
+
+package com.svix.kotlin
+
+import com.svix.kotlin.exceptions.ApiException
+import com.svix.kotlin.internal.apis.{{ api_type_name }}
+{% for c in referenced_components -%}
+    import com.svix.kotlin.models.{{ c | to_upper_camel_case }}
+{% endfor -%}
+
+{% for op in resource.operations -%}
+    {% if op.query_params | length > 0 -%}
+    class {{ resource_type_name }}{{ op.name | to_upper_camel_case }}Options {
+        {%- for p in op.query_params %}
+            {% set field_ty = p.type.to_kotlin() -%}
+            {% if not p.required %}{% set field_ty %}{{ field_ty }}?{% endset %}{% endif -%}
+            var {{ p.name | to_lower_camel_case }}: {{ field_ty -}}
+            {% if not p.required %} = null
+            {%- elif p.default is defined %} = {{ p.default }}
+            {%- endif -%}
+        {% endfor %}
+
+        {% for p in op.query_params -%}
+            {% set field_name = p.name | to_lower_camel_case %}
+            {{ p.description | to_doc_comment(style="kotlin") }}
+            {% set field_ty = p.type.to_kotlin() -%}
+            fun {{ field_name }}({{ field_name }}: {{ field_ty }}) = apply {
+                this.{{ field_name }} = {{ field_name }}
+            }
+        {% endfor -%}
+    }
+
+    {% endif -%}
+{% endfor -%}