Add online content repository

Replaces mods and texture pack tabs with a single content tab

src/content/packages.cpp

@@ -0,0 +1,68 @@
+/*
+Minetest
+Copyright (C) 2018 rubenwardy <rw@rubenwardy.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "content/packages.h"
+#include "log.h"
+#include "filesys.h"
+#include "porting.h"
+#include "settings.h"
+#include "content/mods.h"
+#include "content/subgames.h"
+
+#if USE_CURL
+std::vector<Package> getPackagesFromURL(const std::string &url)
+{
+	std::vector<std::string> extra_headers;
+	extra_headers.emplace_back("Accept: application/json");
+
+	Json::Value json = fetchJsonValue(url, &extra_headers);
+	if (!json.isArray()) {
+		errorstream << "Invalid JSON download " << std::endl;
+		return std::vector<Package>();
+	}
+
+	std::vector<Package> packages;
+
+	// Note: `unsigned int` is required to index JSON
+	for (unsigned int i = 0; i < json.size(); ++i) {
+		Package package;
+
+		package.name = json[i]["name"].asString();
+		package.title = json[i]["title"].asString();
+		package.author = json[i]["author"].asString();
+		package.type = json[i]["type"].asString();
+		package.shortDesc = json[i]["shortDesc"].asString();
+		package.url = json[i]["url"].asString();
+
+		Json::Value jScreenshots = json[i]["screenshots"];
+		for (unsigned int j = 0; j < jScreenshots.size(); ++j) {
+			package.screenshots.push_back(jScreenshots[j].asString());
+		}
+
+		if (package.valid()) {
+			packages.push_back(package);
+		} else {
+			errorstream << "Invalid package at " << i << std::endl;
+		}
+	}
+
+	return packages;
+}
+
+#endif