1/**
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "tsInterfaceDeclaration.h"
17
18#include <binder/declaration.h>
19#include <binder/scope.h>
20#include <binder/variable.h>
21#include <typescript/checker.h>
22#include <ir/astDump.h>
23#include <ir/expressions/identifier.h>
24#include <ir/ts/tsInterfaceBody.h>
25#include <ir/ts/tsInterfaceHeritage.h>
26#include <ir/ts/tsTypeParameter.h>
27#include <ir/ts/tsTypeParameterDeclaration.h>
28
29namespace panda::es2panda::ir {
30
31void TSInterfaceDeclaration::Iterate(const NodeTraverser &cb) const
32{
33    cb(id_);
34
35    if (typeParams_) {
36        cb(typeParams_);
37    }
38
39    for (auto *it : extends_) {
40        cb(it);
41    }
42
43    cb(body_);
44}
45
46void TSInterfaceDeclaration::Dump(ir::AstDumper *dumper) const
47{
48    dumper->Add({{"type", "TSInterfaceDeclaration"},
49                 {"body", body_},
50                 {"id", id_},
51                 {"extends", extends_},
52                 {"typeParameters", AstDumper::Optional(typeParams_)}});
53}
54
55void TSInterfaceDeclaration::Compile([[maybe_unused]] compiler::PandaGen *pg) const {}
56
57void CheckInheritedPropertiesAreIdentical(checker::Checker *checker, checker::InterfaceType *type,
58                                          const lexer::SourcePosition &locInfo)
59{
60    checker->GetBaseTypes(type);
61
62    size_t constexpr BASE_SIZE_LIMIT = 2;
63    if (type->Bases().size() < BASE_SIZE_LIMIT) {
64        return;
65    }
66
67    checker->ResolveDeclaredMembers(type);
68
69    checker::InterfacePropertyMap properties;
70
71    for (auto *it : type->Properties()) {
72        properties.insert({it->Name(), {it, type}});
73    }
74
75    for (auto *base : type->Bases()) {
76        checker->ResolveStructuredTypeMembers(base);
77        ArenaVector<binder::LocalVariable *> inheritedProperties(checker->Allocator()->Adapter());
78        base->AsInterfaceType()->CollectProperties(&inheritedProperties);
79
80        for (auto *inheritedProp : inheritedProperties) {
81            auto res = properties.find(inheritedProp->Name());
82            if (res == properties.end()) {
83                properties.insert({inheritedProp->Name(), {inheritedProp, base->AsInterfaceType()}});
84            } else if (res->second.second != type) {
85                checker::Type *sourceType = checker->GetTypeOfVariable(inheritedProp);
86                checker::Type *targetType = checker->GetTypeOfVariable(res->second.first);
87                checker->IsTypeIdenticalTo(sourceType, targetType,
88                                           {"Interface '", type, "' cannot simultaneously extend types '",
89                                            res->second.second, "' and '", base->AsInterfaceType(), "'."},
90                                           locInfo);
91            }
92        }
93    }
94}
95
96checker::Type *TSInterfaceDeclaration::Check(checker::Checker *checker) const
97{
98    binder::Variable *var = id_->Variable();
99    ASSERT(var->Declaration()->Node() && var->Declaration()->Node()->IsTSInterfaceDeclaration());
100
101    if (this == var->Declaration()->Node()) {
102        checker::Type *resolvedType = var->TsType();
103
104        if (!resolvedType) {
105            checker::ObjectDescriptor *desc =
106                checker->Allocator()->New<checker::ObjectDescriptor>(checker->Allocator());
107            resolvedType = checker->Allocator()->New<checker::InterfaceType>(checker->Allocator(), id_->Name(), desc);
108            CHECK_NOT_NULL(resolvedType);
109            resolvedType->SetVariable(var);
110            var->SetTsType(resolvedType);
111        }
112
113        checker::InterfaceType *resolvedInterface = resolvedType->AsObjectType()->AsInterfaceType();
114        CheckInheritedPropertiesAreIdentical(checker, resolvedInterface, id_->Start());
115
116        for (auto *base : resolvedInterface->Bases()) {
117            checker->IsTypeAssignableTo(resolvedInterface, base,
118                                        {"Interface '", id_->Name(), "' incorrectly extends interface '", base, "'"},
119                                        id_->Start());
120        }
121
122        checker->CheckIndexConstraints(resolvedInterface);
123    }
124
125    body_->Check(checker);
126
127    return nullptr;
128}
129
130void TSInterfaceDeclaration::UpdateSelf(const NodeUpdater &cb, [[maybe_unused]] binder::Binder *binder)
131{
132    id_ = std::get<ir::AstNode *>(cb(id_))->AsIdentifier();
133
134    if (typeParams_) {
135        typeParams_ = std::get<ir::AstNode *>(cb(typeParams_))->AsTSTypeParameterDeclaration();
136    }
137
138    for (auto iter = extends_.begin(); iter != extends_.end(); iter++) {
139        *iter = std::get<ir::AstNode *>(cb(*iter))->AsTSInterfaceHeritage();
140    }
141
142    body_ = std::get<ir::AstNode *>(cb(body_))->AsTSInterfaceBody();
143}
144
145}  // namespace panda::es2panda::ir
146