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| 1 | +// Copyright 2017 The Nakama Authors |
| 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 | +package server |
| 16 | + |
| 17 | +import ( |
| 18 | + "database/sql" |
| 19 | + "errors" |
| 20 | + "strconv" |
| 21 | + "strings" |
| 22 | + |
| 23 | + "github.com/satori/go.uuid" |
| 24 | + "go.uber.org/zap" |
| 25 | +) |
| 26 | + |
| 27 | +type GroupCreateParam struct { |
| 28 | + Name string // mandatory |
| 29 | + Creator uuid.UUID // mandatory |
| 30 | + Description string |
| 31 | + AvatarURL string |
| 32 | + Lang string |
| 33 | + Metadata []byte |
| 34 | + Private bool |
| 35 | +} |
| 36 | + |
| 37 | +func extractGroup(r scanner) (*Group, error) { |
| 38 | + var id []byte |
| 39 | + var creatorID []byte |
| 40 | + var name sql.NullString |
| 41 | + var description sql.NullString |
| 42 | + var avatarURL sql.NullString |
| 43 | + var lang sql.NullString |
| 44 | + var utcOffsetMs sql.NullInt64 |
| 45 | + var metadata []byte |
| 46 | + var state sql.NullInt64 |
| 47 | + var count sql.NullInt64 |
| 48 | + var createdAt sql.NullInt64 |
| 49 | + var updatedAt sql.NullInt64 |
| 50 | + |
| 51 | + err := r.Scan(&id, &creatorID, &name, |
| 52 | + &description, &avatarURL, &lang, |
| 53 | + &utcOffsetMs, &metadata, &state, |
| 54 | + &count, &createdAt, &updatedAt) |
| 55 | + |
| 56 | + if err != nil { |
| 57 | + return nil, err |
| 58 | + } |
| 59 | + |
| 60 | + desc := "" |
| 61 | + if description.Valid { |
| 62 | + desc = description.String |
| 63 | + } |
| 64 | + |
| 65 | + avatar := "" |
| 66 | + if avatarURL.Valid { |
| 67 | + avatar = avatarURL.String |
| 68 | + } |
| 69 | + |
| 70 | + private := state.Int64 == 1 |
| 71 | + |
| 72 | + return &Group{ |
| 73 | + Id: id, |
| 74 | + CreatorId: creatorID, |
| 75 | + Name: name.String, |
| 76 | + Description: desc, |
| 77 | + AvatarUrl: avatar, |
| 78 | + Lang: lang.String, |
| 79 | + UtcOffsetMs: utcOffsetMs.Int64, |
| 80 | + Metadata: metadata, |
| 81 | + Private: private, |
| 82 | + Count: count.Int64, |
| 83 | + CreatedAt: createdAt.Int64, |
| 84 | + UpdatedAt: updatedAt.Int64, |
| 85 | + }, nil |
| 86 | +} |
| 87 | + |
| 88 | +func GroupsCreate(logger *zap.Logger, db *sql.DB, groupCreateParams []*GroupCreateParam) ([]*Group, error) { |
| 89 | + if groupCreateParams == nil || len(groupCreateParams) == 0 { |
| 90 | + return nil, errors.New("Could not create groups. At least one group param must be supplied") |
| 91 | + } |
| 92 | + |
| 93 | + groups := make([]*Group, 0) |
| 94 | + tx, err := db.Begin() |
| 95 | + if err != nil { |
| 96 | + logger.Error("Could not create groups", zap.Error(err)) |
| 97 | + return nil, err |
| 98 | + } |
| 99 | + |
| 100 | + defer func() { |
| 101 | + if err != nil { |
| 102 | + logger.Error("Could not create groups", zap.Error(err)) |
| 103 | + if tx != nil { |
| 104 | + txErr := tx.Rollback() |
| 105 | + if txErr != nil { |
| 106 | + logger.Error("Could not rollback transaction", zap.Error(txErr)) |
| 107 | + } |
| 108 | + } |
| 109 | + } else { |
| 110 | + err = tx.Commit() |
| 111 | + if err != nil { |
| 112 | + logger.Error("Could not commit transaction", zap.Error(err)) |
| 113 | + } else { |
| 114 | + groupNames := make([]string, 0) |
| 115 | + for _, p := range groups { |
| 116 | + groupNames = append(groupNames, p.Name) |
| 117 | + } |
| 118 | + logger.Debug("Created new groups", zap.Strings("names", groupNames)) |
| 119 | + } |
| 120 | + } |
| 121 | + }() |
| 122 | + |
| 123 | + for _, g := range groupCreateParams { |
| 124 | + newGroup, err := groupCreate(tx, g) |
| 125 | + if err != nil { |
| 126 | + logger.Warn("Could not create group", zap.String("name", g.Name), zap.Error(err)) |
| 127 | + return nil, err |
| 128 | + } |
| 129 | + |
| 130 | + groups = append(groups, newGroup) |
| 131 | + } |
| 132 | + |
| 133 | + return groups, err |
| 134 | +} |
| 135 | + |
| 136 | +func groupCreate(tx *sql.Tx, g *GroupCreateParam) (*Group, error) { |
| 137 | + if g.Name == "" { |
| 138 | + return nil, errors.New("Group name must not be empty") |
| 139 | + } |
| 140 | + if uuid.Equal(uuid.Nil, g.Creator) { |
| 141 | + return nil, errors.New("Group creator must be set") |
| 142 | + } |
| 143 | + |
| 144 | + state := 0 |
| 145 | + if g.Private { |
| 146 | + state = 1 |
| 147 | + } |
| 148 | + |
| 149 | + columns := make([]string, 0) |
| 150 | + params := make([]string, 0) |
| 151 | + |
| 152 | + values := []interface{}{ |
| 153 | + uuid.NewV4().Bytes(), |
| 154 | + g.Creator.Bytes(), |
| 155 | + g.Name, |
| 156 | + state, |
| 157 | + nowMs(), // updated_at |
| 158 | + } |
| 159 | + |
| 160 | + if g.Description != "" { |
| 161 | + columns = append(columns, "description") |
| 162 | + params = append(params, "$"+strconv.Itoa(len(values)+1)) |
| 163 | + values = append(values, g.Description) |
| 164 | + } |
| 165 | + |
| 166 | + if g.AvatarURL != "" { |
| 167 | + columns = append(columns, "avatar_url") |
| 168 | + params = append(params, "$"+strconv.Itoa(len(values)+1)) |
| 169 | + values = append(values, g.AvatarURL) |
| 170 | + } |
| 171 | + |
| 172 | + if g.Lang != "" { |
| 173 | + columns = append(columns, "lang") |
| 174 | + params = append(params, "$"+strconv.Itoa(len(values)+1)) |
| 175 | + values = append(values, g.Lang) |
| 176 | + } |
| 177 | + |
| 178 | + if g.Metadata != nil { |
| 179 | + columns = append(columns, "metadata") |
| 180 | + params = append(params, "$"+strconv.Itoa(len(values)+1)) |
| 181 | + values = append(values, g.Metadata) |
| 182 | + } |
| 183 | + |
| 184 | + r := tx.QueryRow(` |
| 185 | +INSERT INTO groups (id, creator_id, name, state, count, created_at, updated_at, `+strings.Join(columns, ", ")+")"+` |
| 186 | +VALUES ($1, $2, $3, $4, 1, $5, $5, `+strings.Join(params, ",")+")"+` |
| 187 | +RETURNING id, creator_id, name, description, avatar_url, lang, utc_offset_ms, metadata, state, count, created_at, updated_at |
| 188 | +`, values...) |
| 189 | + |
| 190 | + group, err := extractGroup(r) |
| 191 | + if err != nil { |
| 192 | + return nil, err |
| 193 | + } |
| 194 | + |
| 195 | + res, err := tx.Exec(` |
| 196 | +INSERT INTO group_edge (source_id, position, updated_at, destination_id, state) |
| 197 | +VALUES ($1, $2, $2, $3, 0), ($3, $2, $2, $1, 0)`, |
| 198 | + group.Id, updatedAt, g.Creator.Bytes()) |
| 199 | + |
| 200 | + if err != nil { |
| 201 | + return nil, err |
| 202 | + } |
| 203 | + |
| 204 | + rowAffected, err := res.RowsAffected() |
| 205 | + if err != nil { |
| 206 | + return nil, err |
| 207 | + } |
| 208 | + if rowAffected == 0 { |
| 209 | + err = errors.New("Could not insert into group_edge table") |
| 210 | + return nil, err |
| 211 | + } |
| 212 | + |
| 213 | + return group, nil |
| 214 | +} |
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