add emscripting bindings for Kiwi

bindings/wasm/kiwi_wasm.cpp

@@ -4,9 +4,56 @@
 #include <emscripten/val.h>
 #include <emscripten/bind.h>
 
+using namespace kiwi;
+
+
+static Kiwi* kiwiInstance = nullptr;
+
+void destroy() {
+    if (kiwiInstance) {
+        delete kiwiInstance;
+        kiwiInstance = nullptr;
+    }
+}
+
+void init(const std::string modelPath) {
+    destroy();
+
+    KiwiBuilder builder = KiwiBuilder{ modelPath, 0, BuildOption::default_, false };
+    kiwiInstance = new Kiwi(builder.build(DefaultTypoSet::withoutTypo));
+}
+
+std::vector<TokenInfo> analyze(const std::u16string text) {
+    if (!kiwiInstance) {
+        throw std::runtime_error("Not initialized");
+    }
+
+    const auto tokenResults = kiwiInstance->analyze(text, 1, Match::allWithNormalizing);
+    const auto tokenResult = tokenResults[0];
+
+    return tokenResult.first;
+}
+
+emscripten::val tokenInfoTagToString(const TokenInfo& tokenInfo) {
+    return emscripten::val(tagToString(tokenInfo.tag));
+}
+
+
 EMSCRIPTEN_BINDINGS(kiwi) {
     emscripten::constant("VERSION_MAJOR", KIWI_VERSION_MAJOR);
     emscripten::constant("VERSION_MINOR", KIWI_VERSION_MINOR);
     emscripten::constant("VERSION_PATCH", KIWI_VERSION_PATCH);
     emscripten::constant("VERSION", emscripten::val(KIWI_VERSION_STRING));
-}
+
+    emscripten::function("init", &init);
+    emscripten::function("destroy", &destroy);
+    emscripten::function("analyze", &analyze);
+
+    emscripten::class_<TokenInfo>("TokenInfo")
+        .property("str", &TokenInfo::str)
+        .property("position", &TokenInfo::position)
+        .property("length", &TokenInfo::length)
+        .function("tagToString", &tokenInfoTagToString);
+
+    emscripten::register_vector<TokenInfo>("vector<TokenInfo>");
+}