mirror of
https://github.com/status-im/react-native.git
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4d931d529e
Summary: Adds C++ delta client that keeps modules in memory, and can be used as a RAM bundle. For now, this client expects a `folly::dynamic` object as payload for patches, i.e. the JSON response retrieved from Metro needs to be parsed with `folly::parseJson` by the caller. In the future, we will replace JSON with a streaming friendly binary format. Reviewed By: fromcelticpark Differential Revision: D7845136 fbshipit-source-id: f003f98a2607c8354c427a7e60e01e19e20295b1
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
#include "JSDeltaBundleClient.h"
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#include <sstream>
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#include <folly/Memory.h>
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namespace facebook {
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namespace react {
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namespace {
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std::string startupCode(const folly::dynamic *pre, const folly::dynamic *post) {
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std::ostringstream startupCode;
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for (auto section : {pre, post}) {
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if (section != nullptr) {
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for (folly::dynamic pair : *section) {
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startupCode << pair[1].getString() << '\n';
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}
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}
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}
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return startupCode.str();
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}
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} // namespace
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void JSDeltaBundleClient::patch(const folly::dynamic& delta) {
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auto const reset = delta.get_ptr("reset");
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if (reset != nullptr && reset->asBool()) {
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clear();
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}
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auto const pre = delta.get_ptr("pre");
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auto const post = delta.get_ptr("post");
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if ((pre != nullptr && pre->size() > 0) || (post != nullptr && post->size() > 0)) {
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startupCode_ = startupCode(pre, post);
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}
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const folly::dynamic *modules = delta.get_ptr("delta");
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if (modules != nullptr) {
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for (const folly::dynamic pair : *modules) {
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auto id = pair[0].getInt();
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auto module = pair[1];
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if (module.isNull()) {
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modules_.erase(id);
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} else {
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modules_.emplace(id, module.getString());
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}
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}
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}
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}
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JSModulesUnbundle::Module JSDeltaBundleClient::getModule(uint32_t moduleId) const {
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auto search = modules_.find(moduleId);
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if (search != modules_.end()) {
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return {folly::to<std::string>(search->first, ".js"), search->second};
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}
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throw JSModulesUnbundle::ModuleNotFound(moduleId);
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}
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std::unique_ptr<const JSBigString> JSDeltaBundleClient::getStartupCode() const {
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return folly::make_unique<JSBigStdString>(startupCode_);
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}
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void JSDeltaBundleClient::clear() {
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modules_.clear();
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startupCode_.clear();
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}
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} // namespace react
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} // namespace facebook
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