From a180e1b56025c6b7d81d2e587ad90531d29de44c Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Sat, 5 Jun 2021 19:44:54 -0700
Subject: Initial work on asset system (does not compile)

---
 core/CMakeLists.txt                       |   1 +
 core/src/Model/Assets.cpp                 | 126 +++++++++++++++++++++++++++
 core/src/Model/Assets.hpp                 | 104 ++++++++++++++++++++++
 core/src/Model/Project.cpp                | 139 ------------------------------
 core/src/Model/Project.hpp                |  17 +---
 core/src/Model/Template/Template.hpp      |  22 +++--
 core/src/Model/Template/Template_Main.cpp |  66 +++++++++++++-
 core/src/Model/Template/fwd.hpp           |   2 +-
 core/src/Model/Workflow/Workflow.hpp      |  25 ++++--
 core/src/Model/Workflow/Workflow_Main.cpp |  56 ++++++++++--
 core/src/Model/Workflow/fwd.hpp           |   2 +-
 core/src/Model/fwd.hpp                    |   6 ++
 core/src/UI/UI_Templates.cpp              |  44 +++-------
 13 files changed, 396 insertions(+), 214 deletions(-)
 create mode 100644 core/src/Model/Assets.cpp
 create mode 100644 core/src/Model/Assets.hpp

diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 8483981..64a31d7 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -33,6 +33,7 @@ set(ENTRYPOINT_MODULE_SOURCES
 )
 
 add_source_group(MODEL_MODULE_SOURCES
+	src/Model/Assets.cpp
 	src/Model/Database.cpp
 	src/Model/Filter.cpp
 	src/Model/GlobalStates.cpp
diff --git a/core/src/Model/Assets.cpp b/core/src/Model/Assets.cpp
new file mode 100644
index 0000000..e4eee54
--- /dev/null
+++ b/core/src/Model/Assets.cpp
@@ -0,0 +1,126 @@
+#include "Assets.hpp"
+
+#include <imgui.h>
+#include <fstream>
+#include <utility>
+
+namespace fs = std::filesystem;
+
+Asset::Asset()
+{
+}
+
+std::unique_ptr<Asset> AssetCategory::CreateEmptyUnique(const SavedAsset& diskForm) const
+{
+	return std::unique_ptr<Asset>(CreateEmpty(diskForm));
+}
+
+std::unique_ptr<Asset> AssetCategory::LoadUnique(const SavedAsset& diskForm) const
+{
+	return std::unique_ptr<Asset>(Load(diskForm));
+}
+
+void AssetCategory::DiscoverFilesByExtension(const std::function<void(SavedAsset)>& callback, const std::filesystem::path& containerDir, std::string_view extension)
+{
+	for (auto entry : fs::directory_iterator(containerDir)) {
+		if (!entry.is_regular_file()) continue;
+
+		// If the caller provided an extension to match against, and it doesn't equal to current file extension, skip
+		if (!extension.empty() &&
+			entry.path().extension() != extension)
+		{
+			continue;
+		}
+
+		callback(SavedAsset{
+			.Path = entry.path(),
+			.Name = entry.path().stem().string(),
+		});
+	}
+}
+
+void AssetCategory::DiscoverFilesByHeader(const std::function<void(SavedAsset)>& callback, const std::filesystem::__cxx11::path& containerDir, const std::function<bool(std::istream&)>& validater)
+{
+	// TODO
+}
+
+AssetList::AssetList(const AssetCategory& loader)
+	: mLoader{ &loader }
+{
+}
+
+void AssetList::Reload()
+{
+	mLoader->DiscoverFiles([this](SavedAsset asset) -> void {
+		Create(std::move(asset));
+	});
+}
+
+const SavedAsset* AssetList::FindByName(std::string_view name) const
+{
+	auto iter = mAssets.find(name);
+	if (iter != mAssets.end()) {
+		return &iter.value();
+	} else {
+		return nullptr;
+	}
+}
+
+const SavedAsset& AssetList::Create(SavedAsset asset)
+{
+	auto [iter, DISCARD] = mAssets.insert(asset.Name, SavedAsset{});
+	auto& savedAsset = iter.value();
+
+	mLoader->CreateEmpty(asset);
+	savedAsset = std::move(asset);
+
+	return savedAsset;
+}
+
+std::unique_ptr<Asset> AssetList::CreateAndLoad(SavedAsset assetIn)
+{
+	auto& savedAsset = Create(std::move(assetIn));
+	auto asset = std::unique_ptr<Asset>(mLoader->CreateEmpty(savedAsset));
+	return asset;
+}
+
+std::unique_ptr<Asset> AssetList::LoadFromDisk(std::string_view name) const
+{
+	if (auto savedAsset = FindByName(name)) {
+		auto asset = mLoader->LoadUnique(*savedAsset);
+		return asset;
+	}
+}
+
+bool AssetList::Rename(std::string_view oldName, std::string_view newName)
+{
+}
+
+bool AssetList::Remove(std::string_view name)
+{
+}
+
+int AssetList::GetCacheSizeLimit() const
+{
+	return mCacheSizeLimit;
+}
+
+void AssetList::SetCacheSizeLimit(int limit)
+{
+	mCacheSizeLimit = limit;
+}
+
+void AssetList::DrawBigIcons(DrawState& state)
+{
+	// TODO
+}
+
+void AssetList::DrawDetails(DrawState& state)
+{
+	mLoader->SetupDetailsTable("AssetDetailsTable");
+	for (auto& asset : mAssets) {
+		mLoader->DrawDetailsTableRow(asset);
+		ImGui::TableNextRow();
+	}
+	ImGui::EndTable();
+}
diff --git a/core/src/Model/Assets.hpp b/core/src/Model/Assets.hpp
new file mode 100644
index 0000000..bc5219d
--- /dev/null
+++ b/core/src/Model/Assets.hpp
@@ -0,0 +1,104 @@
+#pragma once
+
+#include <tsl/array_map.h>
+#include <filesystem>
+#include <iosfwd>
+#include <memory>
+#include <string_view>
+
+/// A structure representing a ready-to-be-loaded asset, locating on the disk.
+struct SavedAsset
+{
+	std::filesystem::path Path;
+	std::string Name;
+	/// `Path`'s string form, encoded in UTF-8.
+	std::string PathString = Path.string();
+};
+
+class Asset
+{
+public:
+	Asset();
+	virtual ~Asset() = default;
+};
+
+class AssetCategory
+{
+public:
+	virtual ~AssetCategory() = default;
+
+	virtual void DiscoverFiles(const std::function<void(SavedAsset)>& callback) const = 0;
+
+	virtual Asset* CreateEmpty(const SavedAsset& diskForm) const = 0;
+	std::unique_ptr<Asset> CreateEmptyUnique(const SavedAsset& diskForm) const;
+	virtual Asset* Load(const SavedAsset& diskForm) const = 0;
+	std::unique_ptr<Asset> LoadUnique(const SavedAsset& diskForm) const;
+
+	/// This should call ImGui::BeginTable() along with other accessories such as setting up the header row.
+	virtual void SetupDetailsTable(const char* tableId) const = 0;
+	virtual void DrawBigIcon(const SavedAsset& asset) const = 0;
+	virtual void DrawDetailsTableRow(const SavedAsset& asset) const = 0;
+
+protected:
+	/* Helper loader functions */
+
+	static void DiscoverFilesByExtension(const std::function<void(SavedAsset)>& callback, const std::filesystem::path& containerDir, std::string_view extension);
+	static void DiscoverFilesByHeader(const std::function<void(SavedAsset)>& callback, const std::filesystem::path& containerDir, const std::function<bool(std::istream&)>& validater);
+};
+
+class AssetList
+{
+private:
+	const AssetCategory* mLoader;
+	tsl::array_map<char, SavedAsset> mAssets;
+	tsl::array_map<char, std::unique_ptr<Asset>> mCache;
+	int mCacheSizeLimit = 0;
+
+public:
+	AssetList(const AssetCategory& loader);
+
+	// TODO support file watches
+	void Reload();
+
+	const SavedAsset* FindByName(std::string_view name) const;
+	const SavedAsset& Create(SavedAsset asset);
+	std::unique_ptr<Asset> CreateAndLoad(SavedAsset asset);
+	std::unique_ptr<Asset> LoadFromDisk(std::string_view name) const;
+	bool Rename(std::string_view oldName, std::string_view newName);
+	bool Remove(std::string_view name);
+
+	int GetCacheSizeLimit() const;
+	void SetCacheSizeLimit(int limit);
+
+	struct DrawState
+	{
+		const SavedAsset* SelectedAsset = nullptr;
+	};
+	void DrawBigIcons(DrawState& state);
+	void DrawDetails(DrawState& state);
+};
+
+template <class TAsset>
+class TypedAssetList : public AssetList
+{
+public:
+	using Asset = TAsset;
+	using AssetType = typename TAsset::CategoryType;
+
+public:
+	// Import constructor
+	using AssetList::AssetList;
+
+	Asset* FindByName(std::string_view name) const
+	{
+		return static_cast<TAsset*>(AssetList::FindByName(name));
+	}
+	std::unique_ptr<Asset> Create(std::string_view name)
+	{
+		return std::unique_ptr<TAsset>(static_cast<TAsset*>(AssetList::Create(name).release()));
+	}
+	std::unique_ptr<Asset> LoadFromDisk(std::string_view name) const
+	{
+		return std::unique_ptr<TAsset>(static_cast<TAsset>(AssetList::LoadFromDisk(name)));
+	}
+};
diff --git a/core/src/Model/Project.cpp b/core/src/Model/Project.cpp
index 3cb3cb4..9f41d3a 100644
--- a/core/src/Model/Project.cpp
+++ b/core/src/Model/Project.cpp
@@ -62,23 +62,6 @@ Project::Project(fs::path rootPath)
 	ReadItemList(Products, itemsDir / "products.json");
 	ReadItemList(Factories, itemsDir / "factories.json");
 	ReadItemList(Customers, itemsDir / "customers.json");
-
-	auto workflowsDir = mRootPath / "workflows";
-	fs::create_directories(workflowsDir);
-
-	for (auto& entry : fs::directory_iterator(workflowsDir)) {
-		if (!entry.is_regular_file()) continue;
-		auto& path = entry.path();
-		if (path.extension() != ".cplt-workflow") continue;
-
-		auto name = path.stem().string();
-		auto [it, DISCARD] = mWorkflows.insert(name, WorkflowInfo{});
-		auto& info = it.value();
-
-		info.Name = std::move(name);
-		info.PathStringCache = path.string();
-		info.Path = path;
-	}
 }
 
 Project::Project(fs::path rootPath, std::string name)
@@ -139,128 +122,6 @@ void Project::SetName(std::string name)
 	mName = std::move(name);
 }
 
-const tsl::array_map<char, WorkflowInfo>& Project::GetWorkflows() const
-{
-	return mWorkflows;
-}
-
-std::unique_ptr<Workflow> Project::LoadWorkflow(std::string_view name)
-{
-	auto iter = mWorkflows.find(name);
-	if (iter == mWorkflows.end()) {
-		return iter.value().LoadFromDisk();
-	} else {
-		return nullptr;
-	}
-}
-
-std::unique_ptr<Workflow> Project::CreateWorkflow(std::string_view name)
-{
-	if (mWorkflows.find(name) != mWorkflows.end()) {
-		// Workflow with name already exists
-		return nullptr;
-	}
-
-	auto workflow = std::make_unique<Workflow>();
-	auto [it, DISCARD] = mWorkflows.insert(
-		name,
-		WorkflowInfo{
-			.Path = GetWorkflowPath(name),
-			.Name = std::string(name),
-		});
-
-	return workflow;
-}
-
-bool Project::RemoveWorkflow(std::string_view name)
-{
-	auto iter = mWorkflows.find(name);
-	if (iter == mWorkflows.end()) {
-		return false;
-	}
-	auto& info = iter.value();
-
-	fs::remove(info.Path);
-	mWorkflows.erase(iter);
-
-	return true;
-}
-
-bool Project::RenameWorkflow(std::string_view oldName, std::string_view newName)
-{
-	auto iter = mWorkflows.find(oldName);
-	if (iter == mWorkflows.end()) return false;
-
-	auto info = std::move(iter.value());
-
-	auto& oldPath = info.Path;
-	auto newPath = GetWorkflowPath(newName);
-	fs::rename(oldPath, newPath);
-	info.Path = std::move(newPath);
-
-	mWorkflows.insert(newName, std::move(info));
-	mWorkflows.erase(iter);
-
-	return true;
-}
-
-const tsl::array_map<char, TemplateInfo>& Project::GetTemplates() const
-{
-	return mTemplates;
-}
-
-std::unique_ptr<Template> Project::LoadTemplate(std::string_view name)
-{
-	auto iter = mTemplates.find(name);
-	if (iter == mTemplates.end()) {
-		return iter.value().LoadFromDisk();
-	} else {
-		return nullptr;
-	}
-}
-
-TemplateInfo* Project::InsertTemplate(std::string_view name, TemplateInfo info)
-{
-	auto [it, inserted] = mTemplates.insert(name, info);
-	if (inserted) {
-		return &it.value();
-	} else {
-		return nullptr;
-	}
-}
-
-bool Project::RemoveTemplate(std::string_view name)
-{
-	auto iter = mTemplates.find(name);
-	if (iter == mTemplates.end()) {
-		return false;
-	}
-	auto& info = iter.value();
-
-	fs::remove(info.Path);
-	mTemplates.erase(iter);
-
-	return true;
-}
-
-bool Project::RenameTemplate(std::string_view oldName, std::string_view newName)
-{
-	auto iter = mTemplates.find(oldName);
-	if (iter == mTemplates.end()) return false;
-
-	auto info = std::move(iter.value());
-
-	auto& oldPath = info.Path;
-	auto newPath = GetTemplatePath(newName);
-	fs::rename(oldPath, newPath);
-	info.Path = std::move(newPath);
-
-	mTemplates.insert(newName, std::move(info));
-	mTemplates.erase(iter);
-
-	return true;
-}
-
 Json::Value Project::Serialize()
 {
 	Json::Value root(Json::objectValue);
diff --git a/core/src/Model/Project.hpp b/core/src/Model/Project.hpp
index c971445..fea148d 100644
--- a/core/src/Model/Project.hpp
+++ b/core/src/Model/Project.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Model/Assets.hpp"
 #include "Model/Database.hpp"
 #include "Model/Items.hpp"
 #include "Model/Template/Template.hpp"
@@ -14,13 +15,13 @@
 class Project
 {
 public:
+	TypedAssetList<Workflow> Workflows;
+	TypedAssetList<Template> Templates;
 	ItemList<ProductItem> Products;
 	ItemList<FactoryItem> Factories;
 	ItemList<CustomerItem> Customers;
 
 private:
-	tsl::array_map<char, WorkflowInfo> mWorkflows;
-	tsl::array_map<char, TemplateInfo> mTemplates;
 	std::filesystem::path mRootPath;
 	std::string mRootPathString;
 	std::string mName;
@@ -51,18 +52,6 @@ public:
 	const std::string& GetName() const;
 	void SetName(std::string name);
 
-	const tsl::array_map<char, WorkflowInfo>& GetWorkflows() const;
-	std::unique_ptr<Workflow> LoadWorkflow(std::string_view name);
-	std::unique_ptr<Workflow> CreateWorkflow(std::string_view name);
-	bool RemoveWorkflow(std::string_view name);
-	bool RenameWorkflow(std::string_view oldName, std::string_view newName);
-
-	const tsl::array_map<char, TemplateInfo>& GetTemplates() const;
-	std::unique_ptr<Template> LoadTemplate(std::string_view name);
-	TemplateInfo* InsertTemplate(std::string_view name, TemplateInfo info);
-	bool RemoveTemplate(std::string_view name);
-	bool RenameTemplate(std::string_view oldName, std::string_view newName);
-
 	Json::Value Serialize();
 	void WriteToDisk();
 };
diff --git a/core/src/Model/Template/Template.hpp b/core/src/Model/Template/Template.hpp
index 131a6ac..d876650 100644
--- a/core/src/Model/Template/Template.hpp
+++ b/core/src/Model/Template/Template.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Model/Assets.hpp"
 #include "cplt_fwd.hpp"
 
 #include <filesystem>
@@ -7,7 +8,7 @@
 #include <memory>
 #include <string>
 
-class Template
+class Template : public Asset
 {
 public:
 	enum Kind
@@ -18,6 +19,9 @@ public:
 		KindCount = InvalidKind,
 	};
 
+	using CategoryType = TemplateAssetCategory;
+	static constinit const TemplateAssetCategory Category;
+
 private:
 	Kind mKind;
 
@@ -32,7 +36,7 @@ public:
 
 	Kind GetKind() const;
 
-	enum class ReadResult
+	enum ReadResult
 	{
 		RR_Success,
 		RR_InvalidFormat,
@@ -41,13 +45,13 @@ public:
 	virtual void WriteTo(std::ostream& stream) const = 0;
 };
 
-class TemplateInfo
+class TemplateAssetCategory : public AssetCategory
 {
 public:
-	std::filesystem::path Path;
-	std::string Name;
-	std::string PathStringCache = Path.string();
-	Template::Kind Kind;
-
-	std::unique_ptr<Template> LoadFromDisk() const;
+	virtual void DiscoverFiles(const std::function<void(SavedAsset)>& callback) const override;
+	virtual Template* CreateEmpty(const SavedAsset& diskForm) const override;
+	virtual Template* Load(const SavedAsset& diskForm) const override;
+	virtual void SetupDetailsTable(const char* tableId) const override;
+	virtual void DrawBigIcon(const SavedAsset& asset) const override;
+	virtual void DrawDetailsTableRow(const SavedAsset& asset) const override;
 };
diff --git a/core/src/Model/Template/Template_Main.cpp b/core/src/Model/Template/Template_Main.cpp
index 35da52b..9efbeae 100644
--- a/core/src/Model/Template/Template_Main.cpp
+++ b/core/src/Model/Template/Template_Main.cpp
@@ -1,5 +1,15 @@
 #include "Template.hpp"
 
+#include "Model/GlobalStates.hpp"
+#include "Model/Project.hpp"
+
+#include <imgui.h>
+#include <fstream>
+
+using namespace std::literals::string_view_literals;
+
+constinit const TemplateAssetCategory Template::Category{};
+
 Template::Template(Kind kind)
 	: mKind{ kind }
 {
@@ -10,8 +20,60 @@ Template::Kind Template::GetKind() const
 	return mKind;
 }
 
-std::unique_ptr<Template> TemplateInfo::LoadFromDisk() const
+void TemplateAssetCategory::DiscoverFiles(const std::function<void(SavedAsset)>& callback) const
 {
+	auto& gs = GlobalStates::GetInstance();
+	DiscoverFilesByExtension(callback, gs.GetCurrentProject()->GetTemplatesDirectory(), ".cplt-template"sv);
+}
+
+Template* TemplateAssetCategory::CreateEmpty(const SavedAsset& diskForm) const
+{
+	// TODO
+}
+
+Template* TemplateAssetCategory::Load(const SavedAsset& diskForm) const
+{
+	std::ifstream ifs(diskForm.Path);
+	if (!ifs) return nullptr;
+
+	uint32_t iKind;
+	ifs >> iKind;
+
+	auto kind = (Template::Kind)iKind;
+	auto tmpl = Template::CreateByKind(kind);
+
+	auto res = tmpl->ReadFrom(ifs);
+	if (res != Template::RR_Success) {
+		return nullptr;
+	}
+
+	return tmpl.release();
+}
+
+void TemplateAssetCategory::SetupDetailsTable(const char* tableId) const
+{
+	ImGui::BeginTable(tableId, 3);
+
+	ImGui::TableSetupColumn("Name");
+	ImGui::TableSetupColumn("Type");
+	ImGui::TableSetupColumn("Modified time");
+	ImGui::TableHeadersRow();
+}
+
+void TemplateAssetCategory::DrawBigIcon(const SavedAsset& asset) const
+{
+	// TODO
+}
+
+void TemplateAssetCategory::DrawDetailsTableRow(const SavedAsset& asset) const
+{
+	ImGui::TableNextColumn();
+	ImGui::TextUnformatted(asset.Name.c_str());
+
+	ImGui::TableNextColumn();
+	// TODO
+	//ImGui::TextUnformatted(Template::FormatKind(asset.));
+
+	ImGui::TableNextColumn();
 	// TODO
-	return nullptr;
 }
diff --git a/core/src/Model/Template/fwd.hpp b/core/src/Model/Template/fwd.hpp
index 6bc7349..aad9f14 100644
--- a/core/src/Model/Template/fwd.hpp
+++ b/core/src/Model/Template/fwd.hpp
@@ -8,4 +8,4 @@ class TableTemplate;
 
 // Template.hpp
 class Template;
-class TemplateInfo;
+class TemplateAssetCategory;
diff --git a/core/src/Model/Workflow/Workflow.hpp b/core/src/Model/Workflow/Workflow.hpp
index c57ac31..51596e5 100644
--- a/core/src/Model/Workflow/Workflow.hpp
+++ b/core/src/Model/Workflow/Workflow.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Model/Assets.hpp"
 #include "Model/Workflow/Value.hpp"
 #include "Utils/Vector.hpp"
 #include "cplt_fwd.hpp"
@@ -174,17 +175,12 @@ protected:
 	void OnDetach();
 };
 
-struct WorkflowInfo
+class Workflow : public Asset
 {
-	std::filesystem::path Path;
-	std::string Name;
-	std::string PathStringCache = Path.string();
-
-	std::unique_ptr<Workflow> LoadFromDisk() const;
-};
+public:
+	using CategoryType = WorkflowAssetCategory;
+	static constinit const WorkflowAssetCategory Category;
 
-class Workflow
-{
 private:
 	friend class WorkflowNode;
 	friend class WorkflowEvaluationContext;
@@ -279,3 +275,14 @@ private:
 	std::pair<WorkflowConnection&, size_t> AllocWorkflowConnection();
 	std::pair<std::unique_ptr<WorkflowNode>&, size_t> AllocWorkflowStep();
 };
+
+class WorkflowAssetCategory : public AssetCategory
+{
+public:
+	virtual void DiscoverFiles(const std::function<void(SavedAsset)>& callback) const override;
+	virtual Workflow* CreateEmpty(const SavedAsset& diskForm) const override;
+	virtual Workflow* Load(const SavedAsset& diskForm) const override;
+	virtual void SetupDetailsTable(const char* tableId) const override;
+	virtual void DrawBigIcon(const SavedAsset& asset) const override;
+	virtual void DrawDetailsTableRow(const SavedAsset& asset) const override;
+};
diff --git a/core/src/Model/Workflow/Workflow_Main.cpp b/core/src/Model/Workflow/Workflow_Main.cpp
index 61cd510..0875f11 100644
--- a/core/src/Model/Workflow/Workflow_Main.cpp
+++ b/core/src/Model/Workflow/Workflow_Main.cpp
@@ -1,5 +1,8 @@
 #include "Workflow.hpp"
 
+#include "Model/GlobalStates.hpp"
+#include "Model/Project.hpp"
+
 #include <imgui.h>
 #include <imgui_node_editor.h>
 #include <tsl/robin_set.h>
@@ -9,6 +12,7 @@
 #include <queue>
 #include <utility>
 
+using namespace std::literals::string_view_literals;
 namespace ImNodes = ax::NodeEditor;
 
 WorkflowConnection::WorkflowConnection()
@@ -320,17 +324,49 @@ void WorkflowNode::OnDetach()
 {
 }
 
-std::unique_ptr<Workflow> WorkflowInfo::LoadFromDisk() const
+constinit const WorkflowAssetCategory Workflow::Category{};
+
+void WorkflowAssetCategory::DiscoverFiles(const std::function<void(SavedAsset)>& callback) const
+{
+	auto& gs = GlobalStates::GetInstance();
+	DiscoverFilesByExtension(callback, gs.GetCurrentProject()->GetWorkflowsDirectory(), ".cplt-workflow"sv);
+}
+
+Workflow* WorkflowAssetCategory::CreateEmpty(const SavedAsset& diskForm) const
+{
+	// TODO
+}
+
+Workflow* WorkflowAssetCategory::Load(const SavedAsset& diskForm) const
 {
-	std::ifstream ifs(this->Path);
+	std::ifstream ifs(diskForm.Path);
 	if (!ifs) return nullptr;
 
 	auto workflow = std::make_unique<Workflow>();
-	if (workflow->ReadFrom(ifs) == Workflow::RR_Success) {
-		return workflow;
+	if (workflow->ReadFrom(ifs) != Workflow::RR_Success) {
+		return nullptr;
 	}
 
-	return nullptr;
+	return workflow.release();
+}
+
+void WorkflowAssetCategory::SetupDetailsTable(const char* tableId) const
+{
+	ImGui::BeginTable(tableId, 2);
+
+	ImGui::TableSetupColumn("Name");
+	ImGui::TableSetupColumn("Modified time");
+	ImGui::TableHeadersRow();
+}
+
+void WorkflowAssetCategory::DrawBigIcon(const SavedAsset& asset) const
+{
+	// TODO
+}
+
+void WorkflowAssetCategory::DrawDetailsTableRow(const SavedAsset& asset) const
+{
+	// TODO
 }
 
 const std::vector<WorkflowConnection>& Workflow::GetConnections() const
@@ -717,6 +753,16 @@ void Workflow::WriteTo(std::ostream& stream)
 	}
 }
 
+void Workflow::DrawBigIcon() const
+{
+	// TODO
+}
+
+void Workflow::DrawDetailTableRow() const
+{
+	// TODO
+}
+
 std::pair<WorkflowConnection&, size_t> Workflow::AllocWorkflowConnection()
 {
 	for (size_t idx = 0; idx < mConnections.size(); ++idx) {
diff --git a/core/src/Model/Workflow/fwd.hpp b/core/src/Model/Workflow/fwd.hpp
index d118fe8..8f0263d 100644
--- a/core/src/Model/Workflow/fwd.hpp
+++ b/core/src/Model/Workflow/fwd.hpp
@@ -18,5 +18,5 @@ class BaseObjectValue;
 // Workflow.hpp
 class WorkflowConnection;
 class WorkflowNode;
-struct WorkflowInfo;
 class Workflow;
+class WorkflowAssetCategory;
diff --git a/core/src/Model/fwd.hpp b/core/src/Model/fwd.hpp
index cb7c7dd..ba7b156 100644
--- a/core/src/Model/fwd.hpp
+++ b/core/src/Model/fwd.hpp
@@ -11,6 +11,12 @@ class DeliveryTable;
 class MainDatabase;
 
 // Assets.hpp
+struct SavedAsset;
+class Asset;
+class AssetCategory;
+class AssetList;
+template <class T>
+class TypedAssetList;
 
 // Filter.hpp
 class TableRowsFilter;
diff --git a/core/src/UI/UI_Templates.cpp b/core/src/UI/UI_Templates.cpp
index 4f6e69e..7ebb9e1 100644
--- a/core/src/UI/UI_Templates.cpp
+++ b/core/src/UI/UI_Templates.cpp
@@ -130,41 +130,17 @@ std::unique_ptr<TemplateUI> TemplateUI::CreateByKind(Template::Kind kind)
 		case Template::InvalidKind: return nullptr;
 	}
 }
-
-struct DrawTemplateList_State
-{
-	// Internal data
-
-	// Items that are intended for user usage
-	const TemplateInfo* SelectedTemplate = nullptr;
-};
-
-void DrawTemplateList(DrawTemplateList_State& state)
-{
-	auto& gs = GlobalStates::GetInstance();
-	auto& templates = gs.GetCurrentProject()->GetTemplates();
-
-	for (auto& info : templates) {
-		if (ImGui::Selectable(info.Name.c_str(), state.SelectedTemplate == &info)) {
-			state.SelectedTemplate = &info;
-		}
-		if (ImGui::IsItemHovered()) {
-			ImGui::BeginTooltip();
-			ImGui::Text("Path: %s", info.PathStringCache.c_str());
-			ImGui::EndTooltip();
-		}
-	}
-}
 } // namespace
 
 void UI::TemplatesTab()
 {
 	auto ls = LocaleStrings::Instance.get();
 	auto& gs = GlobalStates::GetInstance();
+	auto& project = *gs.GetCurrentProject();
 
 	bool openedDummy = true;
 	static std::unique_ptr<TemplateUI> openTemplate;
-	static DrawTemplateList_State state;
+	static AssetList::DrawState state;
 
 	// Toolbar item: close
 	if (ImGui::Button(ls->Close.Get(), openTemplate == nullptr)) {
@@ -177,11 +153,11 @@ void UI::TemplatesTab()
 		ImGui::OpenPopup("Open template");
 	}
 	if (ImGui::BeginPopupModal("Open template", &openedDummy, ImGuiWindowFlags_AlwaysAutoResize)) {
-		DrawTemplateList(state);
+		project.Templates.DrawDetails(state);
 
-		if (state.SelectedTemplate) {
-			auto kind = state.SelectedTemplate->Kind;
-			auto tmpl = state.SelectedTemplate->LoadFromDisk();
+		if (state.SelectedAsset) {
+			auto kind = state.SelectedAsset->Kind;
+			auto tmpl = state.SelectedAsset->LoadFromDisk();
 			openTemplate = TemplateUI::CreateByKind(kind, std::move(tmpl));
 		}
 
@@ -194,7 +170,7 @@ void UI::TemplatesTab()
 		ImGui::OpenPopup("Manage templates");
 	}
 	if (ImGui::BeginPopupModal("Manage templates", &openedDummy, ImGuiWindowFlags_AlwaysAutoResize)) {
-		DrawTemplateList(state);
+		project.Templates.DrawDetails(state);
 
 		enum class NameSelectionError
 		{
@@ -257,8 +233,6 @@ void UI::TemplatesTab()
 			}
 
 			if (ImGui::Button(ls->DialogConfirm.Get(), IsInputValid())) {
-				auto& project = *gs.GetCurrentProject();
-
 				project.InsertTemplate(
 					newName,
 					TemplateInfo{
@@ -280,6 +254,7 @@ void UI::TemplatesTab()
 			ImGui::EndPopup();
 		}
 
+		ImGui::SameLine();
 		if (ImGui::Button(ls->Rename.Get(), state.SelectedTemplate == nullptr)) {
 			ImGui::OpenPopup("Rename template");
 			newName.clear();
@@ -292,7 +267,7 @@ void UI::TemplatesTab()
 			if (ImGui::Button(ls->DialogConfirm.Get(), IsInputValid())) {
 				auto& project = *gs.GetCurrentProject();
 
-				project.RenameTemplate(
+				project.Templates.Rename(
 					state.SelectedTemplate->Name,
 					newName);
 
@@ -309,6 +284,7 @@ void UI::TemplatesTab()
 			ImGui::EndPopup();
 		}
 
+		ImGui::SameLine();
 		if (ImGui::Button(ls->Delete.Get(), state.SelectedTemplate == nullptr)) {
 			ImGui::OpenPopup("Delete confirmation");
 		}
-- 
cgit v1.2.3-70-g09d2