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#include "../include/Package.hpp"
#include "../include/curl.hpp"
#include "../external/rapidjson/error/en.h"
#ifdef GetObject
#undef GetObject
#endif
using namespace std;
using namespace rapidjson;
static Document *packageList = nullptr;
namespace sibs
{
// TODO: Use containsPlatform in Conf.hpp instead? dont need a vector of string when we can use vector of enum
bool containsPlatform(const vector<string> &supportedPlatforms, const char *platform)
{
for(const string &supportedPlatform : supportedPlatforms)
{
if(strcmp(supportedPlatform.c_str(), platform) == 0 || strcmp(supportedPlatform.c_str(), "any") == 0)
return true;
}
return false;
}
Result<PackageMetadata> getPackageMetadata(Value::ConstObject jsonObj)
{
const auto &description = jsonObj.FindMember("description");
if(description == jsonObj.MemberEnd() || !description->value.IsString()) return Result<PackageMetadata>::Err("Expected description to be a string");
const auto &version = jsonObj.FindMember("version");
if(version == jsonObj.MemberEnd() || !version->value.IsString()) return Result<PackageMetadata>::Err("Expected version to be a string");
const auto &platforms = jsonObj.FindMember("platforms");
if(platforms == jsonObj.MemberEnd() || !platforms->value.IsArray() || platforms->value.GetArray().Empty()) return Result<PackageMetadata>::Err("Expected platforms to be an array of strings");
const auto &urls = jsonObj.FindMember("urls");
if(urls == jsonObj.MemberEnd() || !urls->value.IsArray() || urls->value.GetArray().Empty()) return Result<PackageMetadata>::Err("Expected urls to be an array of string");
PackageMetadata packageMetadata;
packageMetadata.description.assign(description->value.GetString(), description->value.GetStringLength());
packageMetadata.version.assign(version->value.GetString(), version->value.GetStringLength());
const auto &platformsArray = platforms->value.GetArray();
packageMetadata.platforms.reserve(platformsArray.Size());
for(int i = 0; i < platformsArray.Size(); ++i)
{
const auto &platformElement = platformsArray[i];
if(!platformElement.IsString())
return Result<PackageMetadata>::Err("Expected platforms to only contain strings");
packageMetadata.platforms.push_back(platformElement.GetString());
}
const auto &urlsArray = urls->value.GetArray();
packageMetadata.urls.reserve(urlsArray.Size());
for(int i = 0; i < urlsArray.Size(); ++i)
{
const auto &urlElement = urlsArray[i];
if(!urlElement.IsString())
return Result<PackageMetadata>::Err("Expected urls to only contain strings");
packageMetadata.urls.push_back(urlElement.GetString());
}
return Result<PackageMetadata>::Ok(packageMetadata);
}
Result<string> getPackageUrl(const PackageMetadata &packageMetadata, const char *packageName, const char *packageVersion, const char *platform)
{
if(strcmp(packageMetadata.version.c_str(), packageVersion) != 0)
{
string errMsg = "Package \"";
errMsg += packageName;
errMsg += "\" does not exist for version \"";
errMsg += packageVersion;
errMsg += "\"";
return Result<string>::Err(errMsg);
}
if(!containsPlatform(packageMetadata.platforms, platform))
{
string errMsg = "Package \"";
errMsg += packageName;
errMsg += "\" with version \"";
errMsg += packageVersion;
errMsg += "\" does not support platform \"";
errMsg += platform;
errMsg += "\"";
return Result<string>::Err(errMsg);
}
return Result<string>::Ok(packageMetadata.urls[0]);
}
// TODO: Always downloading is fine right now because the package list is small. This should later be modified to use local cache.
// The package file should be stored locally (at ~/.cache/sibs/packages.json) and the version file should also be stored.
// First we check if the version is incorrect and if it, we download the new packages.json file.
// We should only check if the package list is up to date once every 10 minute or so (make it configurable in a config file?)
// to improve build performance and reduce server load.
// Or maybe we dont have to do that at all....
Result<Document*> Package::getPackageList(const char *url)
{
if(packageList)
return Result<Document*>::Ok(packageList);
HttpResult httpResult = curl::get(url);
if(!httpResult.success)
return Result<Document*>::Err(httpResult.str, httpResult.httpCode);
Document *doc = new Document();
ParseResult parseResult = doc->Parse(httpResult.str.c_str());
if(!parseResult)
{
string errMsg = "Failed to parse package list json file: ";
errMsg += GetParseError_En(parseResult.Code());
errMsg += " (";
errMsg += to_string(parseResult.Offset());
errMsg += ")";
return Result<Document*>::Err(errMsg);
}
packageList = doc;
return Result<Document*>::Ok(packageList);
}
Result<string> Package::getPackageUrl(const char *packageName, const char *packageVersion, const char *platform)
{
Result<Document*> packageList = Package::getPackageList("https://raw.githubusercontent.com/DEC05EBA/sibs_packages/master/packages.json");
if(!packageList)
return Result<string>::Err(packageList);
const Document &packageDoc = *packageList.unwrap();
auto packageMetaDataJsonIt = packageDoc.FindMember(packageName);
if (packageMetaDataJsonIt == packageDoc.MemberEnd())
{
string errMsg = "No package with the name \"";
errMsg += packageName;
errMsg += "\" was found";
return Result<string>::Err(errMsg);
}
if(packageMetaDataJsonIt->value.IsObject())
{
Result<PackageMetadata> packageMetadataResult = getPackageMetadata(packageMetaDataJsonIt->value.GetObject());
if(!packageMetadataResult) return Result<string>::Err(packageMetadataResult);
return ::sibs::getPackageUrl(packageMetadataResult.unwrap(), packageName, packageVersion, platform);
}
else if(packageMetaDataJsonIt->value.IsArray())
{
int i = 0;
for(const auto &packageData : packageMetaDataJsonIt->value.GetArray())
{
if(!packageData.IsObject())
{
string errMsg = "Package file is corrupt. ";
errMsg += packageName;
errMsg += "[";
errMsg += to_string(i);
errMsg += "] is not an object";
return Result<string>::Err(errMsg);
}
Result<PackageMetadata> packageMetadataResult = getPackageMetadata(packageData.GetObject());
if(packageMetadataResult)
{
Result<string> packageUrlResult = ::sibs::getPackageUrl(packageMetadataResult.unwrap(), packageName, packageVersion, platform);
if(packageUrlResult)
return packageUrlResult;
}
++i;
}
string errMsg = "Package \"";
errMsg += packageName;
errMsg += "\" with version \"";
errMsg += packageVersion;
errMsg += "\" does not exist or does not exist for platform \"";
errMsg += platform;
errMsg += "\"";
return Result<string>::Err(errMsg);
}
else
{
string errMsg = "No package with the name \"";
errMsg += packageName;
errMsg += "\" was found";
return Result<string>::Err(errMsg);
}
}
}
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