1 files changed, 62 insertions, 0 deletions
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/macros.sys.mjs b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/macros.sys.mjs
new file mode 100644
index 0000000000..d0dfed6c85
--- /dev/null
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/macros.sys.mjs
@@ -0,0 +1,62 @@
+{%- macro call_scaffolding_function(func) %}
+{%- call _call_scaffolding_function(func, func.return_type(), "", func.is_js_async(config)) -%}
+{%- endmacro %}
+
+{%- macro call_constructor(cons, object_type, is_async) %}
+{%- call _call_scaffolding_function(cons, Some(object_type), "", is_async) -%}
+{%- endmacro %}
+
+{%- macro call_method(method, object_type, is_async) %}
+{%- call _call_scaffolding_function(method, method.return_type(), object_type.ffi_converter(), is_async) -%}
+{%- endmacro %}
+
+{%- macro _call_scaffolding_function(func, return_type, receiver_ffi_converter, is_async) %}
+        {%- match return_type %}
+        {%- when Some with (return_type) %}
+        const liftResult = (result) => {{ return_type.ffi_converter() }}.lift(result);
+        {%- else %}
+        const liftResult = (result) => undefined;
+        {%- endmatch %}
+        {%- match func.throws_type() %}
+        {%- when Some with (err_type) %}
+        const liftError = (data) => {{ err_type.ffi_converter() }}.lift(data);
+        {%- else %}
+        const liftError = null;
+        {%- endmatch %}
+        const functionCall = () => {
+            {%- for arg in func.arguments() %}
+            try {
+                {{ arg.ffi_converter() }}.checkType({{ arg.nm() }})
+            } catch (e) {
+                if (e instanceof UniFFITypeError) {
+                    e.addItemDescriptionPart("{{ arg.nm() }}");
+                }
+                throw e;
+            }
+            {%- endfor %}
+
+            {%- if is_async %}
+            return UniFFIScaffolding.callAsync(
+            {%- else %}
+            return UniFFIScaffolding.callSync(
+            {%- endif %}
+                {{ function_ids.get(ci, func.ffi_func()) }}, // {{ function_ids.name(ci, func.ffi_func()) }}
+                {%- if receiver_ffi_converter != "" %}
+                {{ receiver_ffi_converter }}.lower(this),
+                {%- endif %}
+                {%- for arg in func.arguments() %}
+                {{ arg.lower_fn() }}({{ arg.nm() }}),
+                {%- endfor %}
+            )
+        }
+
+        {%- if is_async %}
+        try {
+            return functionCall().then((result) => handleRustResult(result, liftResult, liftError));
+        }  catch (error) {
+            return Promise.reject(error)
+        }
+        {%- else %}
+        return handleRustResult(functionCall(), liftResult, liftError);
+        {%- endif %}
+{%- endmacro %}