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| 1 | +// Copyright 2020 Google LLC |
| 2 | +// |
| 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 | +#include "database/src/desktop/persistence/flatbuffer_conversions.h" |
| 16 | + |
| 17 | +#include "app/src/include/firebase/variant.h" |
| 18 | +#include "app/src/variant_util.h" |
| 19 | +#include "database/src/common/query_spec.h" |
| 20 | +#include "database/src/desktop/core/compound_write.h" |
| 21 | +#include "database/src/desktop/core/tracked_query_manager.h" |
| 22 | +#include "database/src/desktop/persistence/persisted_compound_write_generated.h" |
| 23 | +#include "database/src/desktop/persistence/persisted_tracked_query_generated.h" |
| 24 | +#include "database/src/desktop/persistence/persisted_user_write_record_generated.h" |
| 25 | +#include "database/src/desktop/persistence/persistence_storage_engine.h" |
| 26 | +#include "flatbuffers/flatbuffers.h" |
| 27 | +#include "flatbuffers/util.h" |
| 28 | + |
| 29 | +using firebase::database::internal::persistence::CreatePersistedCompoundWrite; |
| 30 | +using firebase::database::internal::persistence::CreatePersistedQueryParams; |
| 31 | +using firebase::database::internal::persistence::CreatePersistedQuerySpec; |
| 32 | +using firebase::database::internal::persistence::CreatePersistedTrackedQuery; |
| 33 | +using firebase::database::internal::persistence::CreateTreeKeyValuePair; |
| 34 | +using firebase::util::FlexbufferToVariant; |
| 35 | +using firebase::util::VariantToFlexbuffer; |
| 36 | +using flatbuffers::FlatBufferBuilder; |
| 37 | +using flatbuffers::Offset; |
| 38 | +using flatbuffers::Vector; |
| 39 | + |
| 40 | +namespace firebase { |
| 41 | +namespace database { |
| 42 | +namespace internal { |
| 43 | + |
| 44 | +static void VariantTreeFromFlatbuffer(const persistence::VariantTreeNode* node, |
| 45 | + Tree<Variant>* out_tree) { |
| 46 | + if (node->value()) { |
| 47 | + out_tree->set_value(FlexbufferToVariant(node->value_flexbuffer_root())); |
| 48 | + } |
| 49 | + if (node->children()) { |
| 50 | + for (const persistence::TreeKeyValuePair* kvp : *node->children()) { |
| 51 | + const char* key = kvp->key()->c_str(); |
| 52 | + const persistence::VariantTreeNode* value = kvp->subtree(); |
| 53 | + Tree<Variant>* subtree = out_tree->GetOrMakeSubtree(Path(key)); |
| 54 | + VariantTreeFromFlatbuffer(value, subtree); |
| 55 | + } |
| 56 | + } |
| 57 | +} |
| 58 | + |
| 59 | +CompoundWrite CompoundWriteFromFlatbuffer( |
| 60 | + const persistence::PersistedCompoundWrite* persisted_compound_write) { |
| 61 | + if (!persisted_compound_write->write_tree()) { |
| 62 | + return CompoundWrite(); |
| 63 | + } |
| 64 | + Tree<Variant> write_tree; |
| 65 | + const persistence::VariantTreeNode* node = |
| 66 | + persisted_compound_write->write_tree(); |
| 67 | + VariantTreeFromFlatbuffer(node, &write_tree); |
| 68 | + return CompoundWrite(write_tree); |
| 69 | +} |
| 70 | + |
| 71 | +QueryParams QueryParamsFromFlatbuffer( |
| 72 | + const persistence::PersistedQueryParams* persisted_query_params) { |
| 73 | + QueryParams params; |
| 74 | + // Set by Query::OrderByPriority(), Query::OrderByChild(), |
| 75 | + // Query::OrderByKey(), and Query::OrderByValue(). |
| 76 | + // Default is kOrderByPriority. |
| 77 | + params.order_by = |
| 78 | + static_cast<QueryParams::OrderBy>(persisted_query_params->order_by()); |
| 79 | + if (persisted_query_params->order_by_child()) { |
| 80 | + params.order_by_child = persisted_query_params->order_by_child()->str(); |
| 81 | + } |
| 82 | + if (persisted_query_params->start_at_value()) { |
| 83 | + params.start_at_value = FlexbufferToVariant( |
| 84 | + persisted_query_params->start_at_value_flexbuffer_root()); |
| 85 | + } |
| 86 | + if (persisted_query_params->start_at_child_key()) { |
| 87 | + params.start_at_child_key = |
| 88 | + persisted_query_params->start_at_child_key()->str(); |
| 89 | + } |
| 90 | + if (persisted_query_params->end_at_value()) { |
| 91 | + params.end_at_value = FlexbufferToVariant( |
| 92 | + persisted_query_params->end_at_value_flexbuffer_root()); |
| 93 | + } |
| 94 | + if (persisted_query_params->end_at_child_key()) { |
| 95 | + params.end_at_child_key = persisted_query_params->end_at_child_key()->str(); |
| 96 | + } |
| 97 | + if (persisted_query_params->equal_to_value()) { |
| 98 | + params.equal_to_value = FlexbufferToVariant( |
| 99 | + persisted_query_params->equal_to_value_flexbuffer_root()); |
| 100 | + } |
| 101 | + if (persisted_query_params->equal_to_child_key()) { |
| 102 | + params.equal_to_child_key = |
| 103 | + persisted_query_params->equal_to_child_key()->str(); |
| 104 | + } |
| 105 | + params.limit_first = persisted_query_params->limit_first(); |
| 106 | + params.limit_last = persisted_query_params->limit_last(); |
| 107 | + return params; |
| 108 | +} |
| 109 | + |
| 110 | +QuerySpec QuerySpecFromFlatbuffer( |
| 111 | + const persistence::PersistedQuerySpec* persisted_query_spec) { |
| 112 | + QuerySpec query_spec; |
| 113 | + if (persisted_query_spec->path()) { |
| 114 | + query_spec.path = Path(persisted_query_spec->path()->c_str()); |
| 115 | + } |
| 116 | + if (persisted_query_spec->params()) { |
| 117 | + query_spec.params = |
| 118 | + QueryParamsFromFlatbuffer(persisted_query_spec->params()); |
| 119 | + } |
| 120 | + return query_spec; |
| 121 | +} |
| 122 | + |
| 123 | +TrackedQuery TrackedQueryFromFlatbuffer( |
| 124 | + const persistence::PersistedTrackedQuery* persisted_tracked_query) { |
| 125 | + TrackedQuery tracked_query; |
| 126 | + tracked_query.query_id = persisted_tracked_query->query_id(); |
| 127 | + if (persisted_tracked_query->query_spec()) { |
| 128 | + tracked_query.query_spec = |
| 129 | + QuerySpecFromFlatbuffer(persisted_tracked_query->query_spec()); |
| 130 | + } |
| 131 | + tracked_query.last_use = persisted_tracked_query->last_use(); |
| 132 | + tracked_query.complete = persisted_tracked_query->complete(); |
| 133 | + tracked_query.active = persisted_tracked_query->active(); |
| 134 | + return tracked_query; |
| 135 | +} |
| 136 | + |
| 137 | +UserWriteRecord UserWriteRecordFromFlatbuffer( |
| 138 | + const persistence::PersistedUserWriteRecord* persisted_user_write_record) { |
| 139 | + UserWriteRecord user_write_record; |
| 140 | + user_write_record.write_id = persisted_user_write_record->write_id(); |
| 141 | + if (persisted_user_write_record->path()) { |
| 142 | + user_write_record.path = Path(persisted_user_write_record->path()->c_str()); |
| 143 | + } |
| 144 | + user_write_record.is_overwrite = persisted_user_write_record->is_overwrite(); |
| 145 | + if (user_write_record.is_overwrite) { |
| 146 | + if (persisted_user_write_record->overwrite()) { |
| 147 | + user_write_record.overwrite = FlexbufferToVariant( |
| 148 | + persisted_user_write_record->overwrite_flexbuffer_root()); |
| 149 | + } |
| 150 | + } else { |
| 151 | + if (persisted_user_write_record->merge()) { |
| 152 | + user_write_record.merge = |
| 153 | + CompoundWriteFromFlatbuffer(persisted_user_write_record->merge()); |
| 154 | + } |
| 155 | + } |
| 156 | + user_write_record.visible = persisted_user_write_record->visible(); |
| 157 | + return user_write_record; |
| 158 | +} |
| 159 | + |
| 160 | +static Offset<persistence::VariantTreeNode> FlatbufferFromVariantTreeNode( |
| 161 | + FlatBufferBuilder* builder, const Tree<Variant>& node) { |
| 162 | + Offset<Vector<uint8_t>> value_offset = 0; |
| 163 | + if (node.value().has_value()) { |
| 164 | + value_offset = |
| 165 | + builder->CreateVector(VariantToFlexbuffer(node.value().value())); |
| 166 | + } |
| 167 | + Offset<Vector<Offset<persistence::TreeKeyValuePair>>> children_vector_offset = |
| 168 | + 0; |
| 169 | + if (!node.children().empty()) { |
| 170 | + std::vector<Offset<persistence::TreeKeyValuePair>> children_offsets; |
| 171 | + for (auto& kvp : node.children()) { |
| 172 | + const std::string& key = kvp.first; |
| 173 | + const Tree<Variant>& value = kvp.second; |
| 174 | + children_offsets.push_back(CreateTreeKeyValuePair( |
| 175 | + *builder, builder->CreateString(key), |
| 176 | + FlatbufferFromVariantTreeNode(builder, value))); |
| 177 | + } |
| 178 | + children_vector_offset = |
| 179 | + builder-> CreateVector<Offset<persistence::TreeKeyValuePair>>( |
| 180 | + children_offsets); |
| 181 | + } |
| 182 | + return CreateVariantTreeNode(*builder, value_offset, children_vector_offset); |
| 183 | +} |
| 184 | + |
| 185 | +Offset<persistence::PersistedCompoundWrite> FlatbufferFromCompoundWrite( |
| 186 | + FlatBufferBuilder* builder, const CompoundWrite& compound_write) { |
| 187 | + return persistence::CreatePersistedCompoundWrite( |
| 188 | + *builder, |
| 189 | + FlatbufferFromVariantTreeNode(builder, compound_write.write_tree())); |
| 190 | +} |
| 191 | + |
| 192 | +Offset<persistence::PersistedQueryParams> FlatbufferFromQueryParams( |
| 193 | + FlatBufferBuilder* builder, const QueryParams& params) { |
| 194 | + return CreatePersistedQueryParams( |
| 195 | + *builder, static_cast<persistence::OrderBy>(params. order_by), |
| 196 | + builder->CreateString(params.order_by_child), |
| 197 | + builder->CreateVector(VariantToFlexbuffer(params.start_at_value)), |
| 198 | + builder->CreateString(params.start_at_child_key), |
| 199 | + builder->CreateVector(VariantToFlexbuffer(params.end_at_value)), |
| 200 | + builder->CreateString(params.end_at_child_key), |
| 201 | + builder->CreateVector(VariantToFlexbuffer(params.equal_to_value)), |
| 202 | + builder->CreateString(params.equal_to_child_key), params.limit_first, |
| 203 | + params.limit_last); |
| 204 | +} |
| 205 | + |
| 206 | +Offset<persistence::PersistedQuerySpec> FlatbufferFromQuerySpec( |
| 207 | + FlatBufferBuilder* builder, const QuerySpec& query_spec) { |
| 208 | + return CreatePersistedQuerySpec( |
| 209 | + *builder, builder->CreateString(query_spec.path.str()), |
| 210 | + FlatbufferFromQueryParams(builder, query_spec.params)); |
| 211 | +} |
| 212 | + |
| 213 | +flatbuffers::Offset<persistence::PersistedTrackedQuery> |
| 214 | +FlatbufferFromTrackedQuery(flatbuffers::FlatBufferBuilder* builder, |
| 215 | + const TrackedQuery& tracked_query) { |
| 216 | + return CreatePersistedTrackedQuery( |
| 217 | + *builder, tracked_query.query_id, |
| 218 | + FlatbufferFromQuerySpec(builder, tracked_query.query_spec), |
| 219 | + tracked_query.last_use, tracked_query.complete, tracked_query.active); |
| 220 | +} |
| 221 | + |
| 222 | +flatbuffers::Offset<persistence::PersistedUserWriteRecord> |
| 223 | +FlatbufferFromUserWriteRecord(flatbuffers::FlatBufferBuilder* builder, |
| 224 | + const UserWriteRecord& user_write_record) { |
| 225 | + return CreatePersistedUserWriteRecord( |
| 226 | + *builder, user_write_record.write_id, |
| 227 | + builder->CreateString(user_write_record.path.str()), |
| 228 | + user_write_record.is_overwrite |
| 229 | + ? builder->CreateVector( |
| 230 | + VariantToFlexbuffer(user_write_record.overwrite)) |
| 231 | + : 0, |
| 232 | + user_write_record.is_overwrite |
| 233 | + ? 0 |
| 234 | + : FlatbufferFromCompoundWrite(builder, user_write_record.merge), |
| 235 | + user_write_record.visible, user_write_record.is_overwrite); |
| 236 | +} |
| 237 | + |
| 238 | +} // namespace internal |
| 239 | +} // namespace database |
| 240 | +} // namespace firebase |
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