Change package list format

1 files changed, 116 insertions, 52 deletions

diff --git a/src/Package.cpp b/src/Package.cpp
index c1c00be..a2aaf52 100644
--- a/src/Package.cpp
+++ b/src/Package.cpp
@@ -9,6 +9,83 @@ 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["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");
+        
+        PackageMetadata packageMetadata;
+        packageMetadata.description.assign(description.GetString(), description.GetStringLength());
+        packageMetadata.version.assign(version.GetString(), version.GetStringLength());
+        
+        const auto &platformsArray = platforms.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.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 ~/.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.
@@ -40,75 +117,62 @@ namespace sibs
         return Result<Document*>::Ok(packageList);
     }
     
-    Result<string> Package::getPackageUrl(const char *packageName, const char *packageVersion)
+    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();
-        const Value &packageMetaData = packageDoc[packageName];
-        if(!packageMetaData.IsObject())
-        {
-            string errMsg = "No package with the name \"";
-            errMsg += packageName;
-            errMsg += "\" was found";
-            return Result<string>::Err(errMsg);
-        }
-        
-        const Value &packageVersions = packageMetaData["versions"];
-        if(!packageVersions.IsObject())
-        {
-            string errMsg = "Package file is corrupt. ";
-            errMsg += packageName;
-            errMsg += ".versions is not a json object";
-            return Result<string>::Err("errMsg");
-        }
-        
-        const Value &package = packageVersions[packageVersion];
-        if(!package.IsObject())
-        {
-            string errMsg = "Package file is corrupt. ";
-            errMsg += packageName;
-            errMsg += ".versions.";
-            errMsg += packageVersion;
-            errMsg += " is not a json object";
-            return Result<string>::Err(errMsg);
-        }
         
-        const Value &packageUrlsValue = package["urls"];
-        if(!packageUrlsValue.IsArray())
+        const Value &packageMetaDataJson = packageDoc[packageName];
+        if(packageMetaDataJson.IsObject())
         {
-            string errMsg = "Package file is corrupt. ";
-            errMsg += packageName;
-            errMsg += ".versions.";
-            errMsg += packageVersion;
-            errMsg += ".urls is not a json array";
-            return Result<string>::Err(errMsg);
+            Result<PackageMetadata> packageMetadataResult = getPackageMetadata(packageMetaDataJson.GetObject());
+            if(!packageMetadataResult) return Result<string>::Err(packageMetadataResult);
+            return ::sibs::getPackageUrl(packageMetadataResult.unwrap(), packageName, packageVersion, platform);
         }
-        
-        auto packageUrls = packageUrlsValue.GetArray();
-        if(packageUrls.Empty())
+        else if(packageMetaDataJson.IsArray())
         {
-            string errMsg = "Package file is corrupt. ";
+            int i = 0;
+            for(const auto &packageData : packageMetaDataJson.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(packageMetaDataJson.GetObject());
+                if(packageMetadataResult)
+                {
+                    Result<string> packageUrlResult = ::sibs::getPackageUrl(packageMetadataResult.unwrap(), packageName, packageVersion, platform);
+                    if(packageUrlResult)
+                        return packageUrlResult;
+                }
+            
+                ++i;
+            }
+            
+            string errMsg = "Package \"";
             errMsg += packageName;
-            errMsg += ".versions.";
+            errMsg += "\" with version \"";
             errMsg += packageVersion;
-            errMsg += ".urls is an empty json array";
+            errMsg += "\" does not exist or does not exist for platform \"";
+            errMsg += platform;
+            errMsg += "\"";
             return Result<string>::Err(errMsg);
         }
-        
-        const Value &packageUrlValue = packageUrls[0];
-        if(!packageUrlValue.IsString())
+        else
         {
-            string errMsg = "Package file is corrupt. ";
+            string errMsg = "No package with the name \"";
             errMsg += packageName;
-            errMsg += ".versions.";
-            errMsg += packageVersion;
-            errMsg += ".urls[0] is not a string";
+            errMsg += "\" was found";
             return Result<string>::Err(errMsg);
         }
-        
-        return Result<std::string>::Ok(string(packageUrlValue.GetString(), packageUrlValue.GetStringLength()));
     }
 }