Utils: Add file access utils for json and text

src/utils/Json.cpp

@@ -1,4 +1,5 @@
 #include "Json.h"
+#include "Platform.h"
 #include "../plugin-macros.generated.h"
 
 bool Utils::Json::JsonArrayIsValidObsArray(json j)
@@ -152,3 +153,24 @@ json Utils::Json::ObsDataToJson(obs_data_t *d, bool includeDefault)
 
 	return j;
 }
+
+bool Utils::Json::GetJsonFileContent(std::string fileName, json &content)
+{
+	std::string textContent;
+	if (!Utils::Platform::GetTextFileContent(fileName, textContent))
+		return false;
+
+	try {
+		content = json::parse(textContent);
+	} catch (json::parse_error& e) {
+		blog(LOG_WARNING, "Failed to decode content of JSON file `%s`. Error: %s", fileName.c_str(), e.what()); 
+		return false;
+	}
+	return true;
+}
+
+bool Utils::Json::SetJsonFileContent(std::string fileName, json content, bool createNew)
+{
+	std::string textContent = content.dump(2);
+	return Utils::Platform::SetTextFileContent(fileName, textContent, createNew);
+}

src/utils/Json.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <string>
 #include <obs.hpp>
 #include <nlohmann/json.hpp>
 
@@ -10,5 +11,7 @@ namespace Utils {
 		bool JsonArrayIsValidObsArray(json j);
 		obs_data_t *JsonToObsData(json j);
 		json ObsDataToJson(obs_data_t *d, bool includeDefault = false);
+		bool GetJsonFileContent(std::string fileName, json &content);
+		bool SetJsonFileContent(std::string fileName, json content, bool createNew = true);
 	}
 }

src/utils/Platform.cpp

@@ -2,6 +2,7 @@
 #include <QCommandLineParser>
 #include <QNetworkInterface>
 #include <QHostAddress>
+#include <QFile>
 #include <obs-frontend-api.h>
 
 #include "Platform.h"
@@ -98,3 +99,27 @@ void Utils::Platform::SendTrayNotification(QSystemTrayIcon::MessageIcon icon, QS
 		delete notification;
 	}, (void*)notification, false);
 }
+
+bool Utils::Platform::GetTextFileContent(std::string fileName, std::string &content)
+{
+	QFile f(QString::fromStdString(fileName));
+	if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
+		return false;
+
+	content = f.readAll().toStdString();
+	return true;
+}
+
+bool Utils::Platform::SetTextFileContent(std::string fileName, std::string content, bool createNew)
+{
+	if (!createNew && !QFile::exists(QString::fromStdString(fileName)))
+		return false;
+
+	QFile f(QString::fromStdString(fileName));
+	if (!f.open(QIODevice::WriteOnly | QIODevice::Text))
+		return false;
+
+	QTextStream out(&f);
+	out << content.c_str();
+	return true;
+}

src/utils/Platform.h

@@ -10,5 +10,7 @@ namespace Utils {
 		QString GetCommandLineArgument(QString arg);
 		bool GetCommandLineFlagSet(QString arg);
 		void SendTrayNotification(QSystemTrayIcon::MessageIcon icon, QString title, QString body);
+		bool GetTextFileContent(std::string fileName, std::string &content);
+		bool SetTextFileContent(std::string filePath, std::string content, bool createNew = true);
 	}
 }