Fix crash on windows when dependency is not found

1 files changed, 25 insertions, 17 deletions

diff --git a/src/Package.cpp b/src/Package.cpp
index d59c6a9..5969ac5 100644
--- a/src/Package.cpp
+++ b/src/Package.cpp
@@ -27,20 +27,20 @@ namespace sibs
     
     Result<PackageMetadata> getPackageMetadata(Value::ConstObject jsonObj)
     {
-        const auto &description = jsonObj["description"];
-        if(!description.IsString()) return Result<PackageMetadata>::Err("Expected description to be a string");
-        const auto &version = jsonObj["version"];
-        if(!version.IsString()) return Result<PackageMetadata>::Err("Expected version to be a string");
-        const auto &platforms = jsonObj["platforms"];
-        if(!platforms.IsArray() || platforms.GetArray().Empty()) return Result<PackageMetadata>::Err("Expected platforms to be an array of strings");
-        const auto &urls = jsonObj["urls"];
-        if(!urls.IsArray() || urls.GetArray().Empty()) return Result<PackageMetadata>::Err("Expected urls to be an array of string");
+        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.GetString(), description.GetStringLength());
-        packageMetadata.version.assign(version.GetString(), version.GetStringLength());
+        packageMetadata.description.assign(description->value.GetString(), description->value.GetStringLength());
+        packageMetadata.version.assign(version->value.GetString(), version->value.GetStringLength());
         
-        const auto &platformsArray = platforms.GetArray();
+        const auto &platformsArray = platforms->value.GetArray();
         packageMetadata.platforms.reserve(platformsArray.Size());
         for(int i = 0; i < platformsArray.Size(); ++i)
         {
@@ -50,7 +50,7 @@ namespace sibs
             packageMetadata.platforms.push_back(platformElement.GetString());
         }
         
-        const auto &urlsArray = urls.GetArray();
+        const auto &urlsArray = urls->value.GetArray();
         packageMetadata.urls.reserve(urlsArray.Size());
         for(int i = 0; i < urlsArray.Size(); ++i)
         {
@@ -129,17 +129,25 @@ namespace sibs
         
         const Document &packageDoc = *packageList.unwrap();
         
-        const Value &packageMetaDataJson = packageDoc[packageName];
-        if(packageMetaDataJson.IsObject())
+		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(packageMetaDataJson.GetObject());
+            Result<PackageMetadata> packageMetadataResult = getPackageMetadata(packageMetaDataJsonIt->value.GetObject());
             if(!packageMetadataResult) return Result<string>::Err(packageMetadataResult);
             return ::sibs::getPackageUrl(packageMetadataResult.unwrap(), packageName, packageVersion, platform);
         }
-        else if(packageMetaDataJson.IsArray())
+        else if(packageMetaDataJsonIt->value.IsArray())
         {
             int i = 0;
-            for(const auto &packageData : packageMetaDataJson.GetArray())
+            for(const auto &packageData : packageMetaDataJsonIt->value.GetArray())
             {
                 if(!packageData.IsObject())
                 {