Add support for outputting IIDX tape LED data via spiceapi (#315)

## Link to GitHub Issue, if one exists
#41 (partially)

## Description of change
This PR adds support for outputting IIDX tape LED data via spiceapi
(`iidx_tapeled_get()`). It returns the data as a `dict`, with the key
being the LED name and the value being the list of RGB values. You can
optionally pass in a variadic list of names to filter the returned data.

The new API function is only implemented in Python since I'm not able to
test the wrappers in other languages.

An example script using the new API is available in this Beef Board PR:
https://github.com/HWXLR8/beef-board/pull/133.

Demo use case: https://streamable.com/pq5e1e

## Testing
Tested in IIDX 32 with custom Beef Board firmware along with a Python
script to read and send the tape LED data over USB.

src/spice2x/api/modules/iidx.cpp

@@ -1,13 +1,9 @@
 #include "iidx.h"
 #include <functional>
-#include <vector>
-#include "games/iidx/iidx.h"
-#include "external/rapidjson/document.h"
 
 using namespace std::placeholders;
 using namespace rapidjson;
 
-
 namespace api::modules {
 
     // settings
@@ -17,6 +13,11 @@ namespace api::modules {
         functions["ticker_get"] = std::bind(&IIDX::ticker_get, this, _1, _2);
         functions["ticker_set"] = std::bind(&IIDX::ticker_set, this, _1, _2);
         functions["ticker_reset"] = std::bind(&IIDX::ticker_reset, this, _1, _2);
+        functions["tapeled_get"] = std::bind(&IIDX::tapeled_get, this, _1, _2);
+
+        for (auto &light : games::iidx::TAPELED_MAPPING) {
+            this->lights_by_names.emplace(light.lightName, light);
+        }
     }
 
     /**
@@ -69,4 +70,51 @@ namespace api::modules {
         // disable read only
         games::iidx::IIDXIO_LED_TICKER_READONLY = false;
     }
+
+    /**
+     * tapeled_get()
+     * tapeled_get(name: str, ...)
+     */
+    void IIDX::tapeled_get(Request &req, Response &res) {
+        Value response_object(kObjectType);
+
+        // all tape leds
+        if (req.params.Size() == 0) {
+            // Iterate through each device and dump its lights data into the response
+            for (const auto &mapping : games::iidx::TAPELED_MAPPING) {
+                copy_tapeled_data(res, response_object, mapping);
+            }
+        } else {
+            // specified light names
+            for (Value &param : req.params.GetArray()) {
+                // check params
+                if (!param.IsString()) {
+                    error_type(res, "name", "string");
+                    return;
+                }
+                const auto name = param.GetString();
+                if (const auto &it = lights_by_names.find(name); it != lights_by_names.end()) {
+                    const auto mapping = it->second.get();
+                    copy_tapeled_data(res, response_object, mapping);
+                }
+            }
+        }
+
+        res.add_data(response_object);
+    }
+
+    void IIDX::copy_tapeled_data(Response &res, Value &response_object, const tapeledutils::tape_led &mapping) {
+        // Create an array for the light state
+        Value light_state(kArrayType);
+        light_state.Reserve(mapping.data.capacity() * 3, res.doc()->GetAllocator());
+        for (const auto [r, g, b] : mapping.data) {
+            light_state.PushBack(r, res.doc()->GetAllocator());
+            light_state.PushBack(g, res.doc()->GetAllocator());
+            light_state.PushBack(b, res.doc()->GetAllocator());
+        }
+
+        // Can't use StringRef here, turns some strings partially into null bytes for some reason
+        Value light_name(mapping.lightName.c_str(), res.doc()->GetAllocator());
+        response_object.AddMember(light_name, light_state, res.doc()->GetAllocator());
+    }
 }

src/spice2x/api/modules/iidx.h

@@ -2,6 +2,7 @@
 
 #include "api/module.h"
 #include "api/request.h"
+#include "games/iidx/iidx.h"
 
 namespace api::modules {
 
@@ -10,10 +11,16 @@ namespace api::modules {
         IIDX();
 
     private:
+        // state
+        robin_hood::unordered_map<std::string, std::reference_wrapper<tapeledutils::tape_led>> lights_by_names;
 
         // function definitions
         void ticker_get(Request &req, Response &res);
         void ticker_set(Request &req, Response &res);
         void ticker_reset(Request &req, Response &res);
+        void tapeled_get(Request &req, Response &res);
+
+        // helper
+        void copy_tapeled_data(Response &res, rapidjson::Value &response_object, const tapeledutils::tape_led &mapping);
     };
 }

src/spice2x/api/resources/python/spiceapi/iidx.py

@@ -16,3 +16,13 @@ def iidx_ticker_set(con: Connection, text: str):
 def iidx_ticker_reset(con: Connection):
     req = Request("iidx", "ticker_reset")
     con.request(req)
+
+
+def iidx_tapeled_get(con: Connection, *light_names):
+    req = Request("iidx", "tapeled_get")
+
+    for light_name in light_names:
+        req.add_param(light_name)
+
+    res = con.request(req)
+    return res.get_data()