1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Firestore/core/src/firebase/firestore/local/local_serializer.h"
#include <cstdlib>
#include <utility>
#include "Firestore/Protos/nanopb/firestore/local/maybe_document.nanopb.h"
#include "Firestore/Protos/nanopb/google/firestore/v1beta1/document.nanopb.h"
#include "Firestore/core/src/firebase/firestore/model/field_value.h"
#include "Firestore/core/src/firebase/firestore/model/no_document.h"
#include "Firestore/core/src/firebase/firestore/nanopb/tag.h"
#include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
namespace firebase {
namespace firestore {
namespace local {
using firebase::firestore::model::ObjectValue;
using firebase::firestore::nanopb::Reader;
using firebase::firestore::nanopb::Tag;
using firebase::firestore::nanopb::Writer;
using firebase::firestore::util::Status;
Status LocalSerializer::EncodeMaybeDocument(
const model::MaybeDocument& document,
std::vector<uint8_t>* out_bytes) const {
Writer writer = Writer::Wrap(out_bytes);
EncodeMaybeDocument(&writer, document);
return writer.status();
}
void LocalSerializer::EncodeMaybeDocument(
Writer* writer, const model::MaybeDocument& maybe_doc) const {
switch (maybe_doc.type()) {
case model::MaybeDocument::Type::Document:
writer->WriteTag(
{PB_WT_STRING, firestore_client_MaybeDocument_document_tag});
writer->WriteNestedMessage([&](Writer* writer) {
EncodeDocument(writer, static_cast<const model::Document&>(maybe_doc));
});
return;
case model::MaybeDocument::Type::NoDocument:
// TODO(rsgowman)
abort();
case model::MaybeDocument::Type::Unknown:
// TODO(rsgowman)
abort();
}
UNREACHABLE();
}
std::unique_ptr<model::MaybeDocument> LocalSerializer::DecodeMaybeDocument(
Reader* reader) const {
if (!reader->status().ok()) return nullptr;
// Initialize MaybeDocument fields to their default values. (Due to the
// 'oneof' in MaybeDocument, only one of 'no_document' or 'document' should
// ever be set.)
std::unique_ptr<model::NoDocument> no_document;
std::unique_ptr<model::Document> document;
while (reader->bytes_left()) {
Tag tag = reader->ReadTag();
if (!reader->status().ok()) return nullptr;
// Ensure the tag matches the wire type
switch (tag.field_number) {
case firestore_client_MaybeDocument_document_tag:
if (!reader->RequireWireType(PB_WT_STRING, tag)) return nullptr;
// 'no_document' and 'document' are part of a oneof. The proto docs
// claim that if both are set on the wire, the last one wins.
no_document = nullptr;
// TODO(rsgowman): If multiple '_document' values are found, we should
// merge them (rather than using the last one.)
document = reader->ReadNestedMessage<std::unique_ptr<model::Document>>(
[&](Reader* reader) -> std::unique_ptr<model::Document> {
return rpc_serializer_.DecodeDocument(reader);
});
break;
case firestore_client_MaybeDocument_no_document_tag:
if (!reader->RequireWireType(PB_WT_STRING, tag)) return nullptr;
// 'no_document' and 'document' are part of a oneof. The proto docs
// claim that if both are set on the wire, the last one wins.
document = nullptr;
// TODO(rsgowman): Parse the no_document field.
abort();
break;
default:
// Unknown tag. According to the proto spec, we need to ignore these.
reader->SkipField(tag);
}
}
if (no_document) {
return no_document;
} else if (document) {
return document;
} else {
reader->set_status(Status(FirestoreErrorCode::DataLoss,
"Invalid MaybeDocument message: Neither "
"'no_document' nor 'document' fields set."));
return nullptr;
}
}
void LocalSerializer::EncodeDocument(Writer* writer,
const model::Document& doc) const {
// Encode Document.name
writer->WriteTag({PB_WT_STRING, google_firestore_v1beta1_Document_name_tag});
writer->WriteString(rpc_serializer_.EncodeKey(doc.key()));
// Encode Document.fields (unless it's empty)
const ObjectValue& object_value = doc.data().object_value();
if (!object_value.internal_value.empty()) {
rpc_serializer_.EncodeObjectMap(
writer, object_value.internal_value,
google_firestore_v1beta1_Document_fields_tag,
google_firestore_v1beta1_Document_FieldsEntry_key_tag,
google_firestore_v1beta1_Document_FieldsEntry_value_tag);
}
// Encode Document.update_time
writer->WriteTag(
{PB_WT_STRING, google_firestore_v1beta1_Document_update_time_tag});
writer->WriteNestedMessage([&](Writer* writer) {
rpc_serializer_.EncodeVersion(writer, doc.version());
});
// Ignore Document.create_time. (We don't use this in our on-disk protos.)
}
util::StatusOr<std::unique_ptr<model::MaybeDocument>>
LocalSerializer::DecodeMaybeDocument(const uint8_t* bytes,
size_t length) const {
Reader reader = Reader::Wrap(bytes, length);
std::unique_ptr<model::MaybeDocument> maybe_doc =
DecodeMaybeDocument(&reader);
if (reader.status().ok()) {
return std::move(maybe_doc);
} else {
return reader.status();
}
}
} // namespace local
} // namespace firestore
} // namespace firebase
|
