public ReflectionDatabase(string filePath, string branch = "unknown", string version = "0.0.0.0")
{
string jsonApiDump = File.ReadAllText(filePath);
Branch = branch;
Version = version;
using (StringReader jsonText = new StringReader(jsonApiDump))
using (JsonTextReader reader = new JsonTextReader(jsonText))
{
Type MemberDescriptor = typeof(MemberDescriptor);
JObject database = JObject.Load(reader);
// Initialize classes.
Source = database;
Classes = new Dictionary <string, ClassDescriptor>();
foreach (JObject classObj in database.GetValue("Classes", StringComparison.InvariantCulture))
{
var classDesc = classObj.ToObject <ClassDescriptor>();
classDesc.Database = this;
bool classDeprecated = classDesc.HasTag("Deprecated");
int membersDeprecated = 0;
// Initialize members.
foreach (JObject memberObj in classObj.GetValue("Members", StringComparison.InvariantCulture))
{
if (Enum.TryParse(memberObj.Value <string>("MemberType"), out MemberType memberType))
{
// Use some Reflection magic to resolve the descriptor object in use.
// This assumes that all MemberType values have a corresponding object with
// a "Descriptor" suffix (Example: MemberType.Property -> PropertyDescriptor)
// It will also assume that the descriptor object derives MemberDescriptor.
string typeName = $"{memberType}Descriptor";
Type descType = Type.GetType($"{MemberDescriptor.Namespace}.{typeName}");
if (!MemberDescriptor.IsAssignableFrom(descType))
{
throw new TypeLoadException(typeName + " does not derive from MemberDescriptor!");
}
var memberDesc = memberObj.ToObject(descType) as MemberDescriptor;
memberDesc.Class = classDesc;
if (classDeprecated)
{
memberDesc.AddTag("Deprecated");
}
else if (memberDesc.HasTag("Deprecated"))
{
membersDeprecated++;
}
classDesc.Members.Add(memberDesc);
}
}
// Drop deprecated members that have a direct PascalCase variant.
var memberLookup = classDesc.Members.ToDictionary(member => member.Name);
foreach (string memberName in memberLookup.Keys)
{
char firstChar = memberName[0];
if (char.IsLower(firstChar))
{
string pascalCase = char.ToUpper(firstChar) + memberName.Substring(1);
if (memberLookup.ContainsKey(pascalCase))
{
MemberDescriptor oldMember = memberLookup[memberName];
if (oldMember.HasTag("Deprecated"))
{
membersDeprecated--;
}
classDesc.Members.Remove(oldMember);
}
}
}
if (membersDeprecated == classDesc.Members.Count && membersDeprecated > 0)
{
classDesc.AddTag("Deprecated");
}
Classes.Add(classDesc.Name, classDesc);
}
// Initialize enums.
Enums = new Dictionary <string, EnumDescriptor>();
foreach (JObject enumObj in database.GetValue("Enums"))
{
var enumDesc = enumObj.ToObject <EnumDescriptor>();
bool enumDeprecated = enumDesc.HasTag("Deprecated");
int itemsDeprecated = 0;
// Initialize items.
foreach (JObject itemObj in enumObj.GetValue("Items"))
{
EnumItemDescriptor itemDesc = itemObj.ToObject <EnumItemDescriptor>();
itemDesc.Enum = enumDesc;
if (enumDeprecated)
{
itemDesc.AddTag("Deprecated");
}
else if (itemDesc.HasTag("Deprecated"))
{
itemsDeprecated++;
}
enumDesc.Items.Add(itemDesc);
}
if (itemsDeprecated == enumDesc.Items.Count && itemsDeprecated > 0)
{
enumDesc.AddTag("Deprecated");
}
Enums.Add(enumDesc.Name, enumDesc);
}
}
}
public static async Task <string> CompareDatabases(ReflectionDatabase oldApi, ReflectionDatabase newApi, string format = "TXT", bool postProcess = true)
{
currentFormat = format.ToLower();
// For the purposes of the differ, treat png like html.
// Its assumed that the result will be processed afterwards.
if (currentFormat == "png")
{
currentFormat = "html";
}
// Clean up old results.
if (results.Count > 0)
{
results.Clear();
}
// Grab the class lists.
var oldClasses = oldApi.Classes;
var newClasses = newApi.Classes;
// Record classes that were added.
foreach (string className in newClasses.Keys)
{
if (!oldClasses.ContainsKey(className))
{
ClassDescriptor classDesc = newClasses[className];
flagEntireClass(classDesc, Added, true);
}
}
// Record classes that were removed.
foreach (string className in oldClasses.Keys)
{
if (!newClasses.ContainsKey(className))
{
ClassDescriptor classDesc = oldClasses[className];
flagEntireClass(classDesc, Removed, false);
}
}
// Run pre-member-diff modifier tasks.
foreach (IDiffModifier preModifier in preModifiers)
{
preModifier.RunModifier(ref results);
}
// Compare class changes.
foreach (string className in oldClasses.Keys)
{
ClassDescriptor oldClass = oldClasses[className];
if (newClasses.ContainsKey(className))
{
ClassDescriptor newClass = newClasses[className];
// Capture the members of these classes.
var oldMembers = createLookupTable(oldClass.Members);
var newMembers = createLookupTable(newClass.Members);
// Compare the classes directly.
var classTagDiffs = CompareTags(oldClass, oldClass.Tags, newClass.Tags);
Compare(oldClass, "superclass", oldClass.Superclass, newClass.Superclass, true);
Compare(oldClass, "memory category", oldClass.MemoryCategory, newClass.MemoryCategory, true);
// Record members that were added.
foreach (string memberName in newMembers.Keys)
{
if (!oldMembers.ContainsKey(memberName))
{
// Add New Member
MemberDescriptor newMember = newMembers[memberName];
Added(newMember);
}
}
// Record members that were changed or removed.
foreach (string memberName in oldMembers.Keys)
{
MemberDescriptor oldMember = oldMembers[memberName];
if (newMembers.ContainsKey(memberName))
{
MemberDescriptor newMember = newMembers[memberName];
if (oldMember.ThreadSafety.Type != ThreadSafetyType.Unknown)
{
Compare(newMember, "thread safety", oldMember.ThreadSafety, newMember.ThreadSafety);
}
// Check if any tags added to this member were also added to its parent class.
var memberTagDiffs = CompareTags(newMember, oldMember.Tags, newMember.Tags);
MergeTagDiffs(classTagDiffs, memberTagDiffs);
// Compare the fields specific to these member types
// TODO: I'd like to move these routines into their respective
// members, but I'm not sure how to do so in a clean manner.
if (newMember is PropertyDescriptor)
{
var oldProp = oldMember as PropertyDescriptor;
var newProp = newMember as PropertyDescriptor;
var oldMerged = oldProp.Security.Merged;
var newMerged = newProp.Security.Merged;
if (oldMerged && newMerged)
{
// Just compare them as a security change alone.
var oldSecurity = oldProp.Security.Value;
var newSecurity = newProp.Security.Value;
Compare(newMember, "security", oldSecurity, newSecurity);
}
else
{
// Compare the read/write permissions individually.
var oldSecurity = oldProp.Security;
var newSecurity = newProp.Security;
string oldRead = oldSecurity.Read.Value,
newRead = newSecurity.Read.Value;
string oldWrite = oldSecurity.Write.Value,
newWrite = newSecurity.Write.Value;
Compare(newMember, "read permissions", oldRead, newRead);
Compare(newMember, "write permissions", oldWrite, newWrite);
}
var oldSerial = oldProp.Serialization.Describe(true);
var newSerial = newProp.Serialization.Describe(true);
Compare(newMember, "serialization", oldSerial, newSerial);
Compare(newMember, "value-type", oldProp.ValueType, newProp.ValueType);
Compare(newMember, "category", oldProp.Category, newProp.Category, true);
}
else if (newMember is FunctionDescriptor)
{
var oldFunc = oldMember as FunctionDescriptor;
var newFunc = newMember as FunctionDescriptor;
Compare(newMember, "security", oldFunc.Security, newFunc.Security);
Compare(newMember, "parameters", oldFunc.Parameters, newFunc.Parameters);
Compare(newMember, "return-type", oldFunc.ReturnType, newFunc.ReturnType);
}
else if (newMember is CallbackDescriptor)
{
var oldCall = oldMember as CallbackDescriptor;
var newCall = newMember as CallbackDescriptor;
Compare(newMember, "security", oldCall.Security, newCall.Security);
Compare(newMember, "parameters", oldCall.Parameters, newCall.Parameters);
Compare(newMember, "expected return-type", oldCall.ReturnType, newCall.ReturnType);
}
else if (newMember is EventDescriptor)
{
var oldEvent = oldMember as EventDescriptor;
var newEvent = newMember as EventDescriptor;
Compare(newMember, "security", oldEvent.Security, newEvent.Security);
Compare(newMember, "parameters", oldEvent.Parameters, newEvent.Parameters);
}
}
else
{
// Remove old member.
Removed(oldMember, false);
}
}
}
}
// Grab the enum lists.
var oldEnums = oldApi.Enums;
var newEnums = newApi.Enums;
// Record enums that were added.
foreach (string enumName in newEnums.Keys)
{
if (!oldEnums.ContainsKey(enumName))
{
EnumDescriptor newEnum = newEnums[enumName];
flagEntireEnum(newEnum, Added, true);
}
}
// Record enums that were changed or removed.
foreach (string enumName in oldEnums.Keys)
{
EnumDescriptor oldEnum = oldEnums[enumName];
if (newEnums.ContainsKey(enumName))
{
EnumDescriptor newEnum = newEnums[enumName];
var enumTagDiffs = CompareTags(newEnum, oldEnum.Tags, newEnum.Tags);
// Grab the enum-item lists.
var oldItems = createLookupTable(oldEnum.Items);
var newItems = createLookupTable(newEnum.Items);
// Record enum-items that were added.
foreach (var itemName in newItems.Keys)
{
if (!oldItems.ContainsKey(itemName))
{
EnumItemDescriptor item = newItems[itemName];
Added(item);
}
}
foreach (var itemName in oldItems.Keys)
{
EnumItemDescriptor oldItem = oldItems[itemName];
if (newItems.ContainsKey(itemName))
{
EnumItemDescriptor newItem = newItems[itemName];
Compare(newItem, "value", oldItem.Value, newItem.Value);
// Check if any tags that were added to this item were also added to its parent enum.
var itemTagDiffs = CompareTags(newItem, oldItem.Tags, newItem.Tags);
MergeTagDiffs(enumTagDiffs, itemTagDiffs);
}
else
{
// Remove old enum-item.
Removed(oldItem, false);
}
}
}
else
{
// Remove old enum.
flagEntireEnum(oldEnum, Removed, false);
}
}
// Exit early if no diffs were recorded.
if (results.Count == 0)
{
return("");
}
// Select diffs that are not parented to other diffs.
List <Diff> diffs = results
.Where(diff => !diff.HasParent)
.ToList();
// Run post-member-diff modifier tasks.
foreach (IDiffModifier postModifier in postModifiers)
{
postModifier.RunModifier(ref diffs);
}
// Remove diffs that were disposed during the modifier tasks,
diffs = diffs
.Where(diff => !diff.Disposed)
.OrderBy(diff => diff)
.ToList();
// Setup actions for generating the final result, based on the requested format.
DiffResultLineAdder addLineToResults;
DiffResultFinalizer finalizeResults;
List <string> lines = diffs
.Select(diff => diff.ToString())
.ToList();
if (currentFormat == "html")
{
var htmlDumper = new ReflectionDumper();
var diffLookup = diffs.ToDictionary(diff => diff.ToString());
addLineToResults = new DiffResultLineAdder((line, addBreak) =>
{
if (addBreak)
{
htmlDumper.Write(HTML_BREAK);
htmlDumper.NextLine();
}
if (diffLookup.ContainsKey(line))
{
Diff diff = diffLookup[line];
diff.WriteDiffHtml(htmlDumper);
}
if (line.EndsWith(NL))
{
htmlDumper.Write(HTML_BREAK);
htmlDumper.NextLine();
}
});
finalizeResults = new DiffResultFinalizer(() =>
{
if (newApi.Branch == "roblox")
{
htmlDumper.NextLine();
}
string result = htmlDumper.ExportResults();
if (postProcess)
{
result = ApiDumpTool.PostProcessHtml(result);
}
return(result);
});
if (newApi.Branch == "roblox")
{
var deployLog = await ApiDumpTool.GetLastDeployLog("roblox");
htmlDumper.OpenHtmlTag("h2");
htmlDumper.Write("Version " + deployLog.VersionId);
htmlDumper.CloseHtmlTag("h2");
htmlDumper.NextLine(2);
}
}
else
{
var final = new List <string>();
addLineToResults = new DiffResultLineAdder((line, addBreak) =>
{
if (addBreak)
{
final.Add("");
}
final.Add(line);
});
finalizeResults = new DiffResultFinalizer(() =>
{
string[] finalLines = final.ToArray();
return(string.Join(NL, finalLines).Trim());
});
}
// Generate the final diff results
string prevLead = "";
string lastLine = NL;
foreach (string line in lines)
{
string[] words = line.Split(' ');
if (words.Length >= 2)
{
// Capture the first two words in this line.
string first = words[0];
string second = words[1];
if (second.ToLower() == "the" && words.Length > 2)
{
second = words[2];
}
string lead = (first + ' ' + second).Trim();
bool addBreak = false;
bool lastLineNoBreak = !lastLine.EndsWith(NL);
// If the first two words of this line aren't the same as the last...
if (lead != prevLead)
{
// Add a break if the last line doesn't have a break.
// (and if there actually were two previous words)
if (prevLead != "" && lastLineNoBreak)
{
addBreak = true;
}
prevLead = lead;
}
// If we didn't add a break, but this line has a break and the
// previous line doesn't, then we will add a break.
if (!addBreak && lastLineNoBreak && line.EndsWith(NL))
{
addBreak = true;
}
// Handle writing this line depending on the format we're using.
addLineToResults(line, addBreak);
lastLine = line;
}
}
return(finalizeResults());
}
