293 lines
8.8 KiB
Go
293 lines
8.8 KiB
Go
package main
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import (
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"context"
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"time"
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"github.com/jackc/pgx/v5"
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"github.com/jackc/pgx/v5/pgxpool"
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)
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var dbConn *pgxpool.Pool
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func DbInit(ctx context.Context) {
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var err error
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dbConn, err = pgxpool.New(ctx, "postgres://master:secret@localhost:5432") // TODO change to env in production
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if err != nil {
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panic(err)
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}
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_, err = dbConn.Exec(ctx, `
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CREATE TABLE IF NOT EXISTS clients (
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id SERIAL PRIMARY KEY,
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name VARCHAR(20) UNIQUE NOT NULL,
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pass_hash VARCHAR(60) NOT NULL,
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pronouns VARCHAR(15) DEFAULT NULL,
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color_red SMALLINT DEFAULT NULL,
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color_green SMALLINT DEFAULT NULL,
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color_blue SMALLINT DEFAULT NULL,
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created_at TIMESTAMP NOT NULL DEFAULT NOW()
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)
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`)
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if err != nil {
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panic(err)
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}
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_, err = dbConn.Exec(ctx, `
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CREATE TABLE IF NOT EXISTS chat_groups (
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id SERIAL PRIMARY KEY,
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name VARCHAR(48) NOT NULL,
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creator_id INTEGER NOT NULL REFERENCES clients(id) ON DELETE CASCADE,
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owner_id INTEGER NOT NULL REFERENCES clients(id) ON DELETE CASCADE,
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enable_client_colors BOOLEAN NOT NULL DEFAULT true,
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color_red SMALLINT DEFAULT NULL,
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color_green SMALLINT DEFAULT NULL,
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color_blue SMALLINT DEFAULT NULL,
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created_at TIMESTAMP NOT NULL DEFAULT NOW()
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)
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`)
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if err != nil {
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panic(err)
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}
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_, err = dbConn.Exec(ctx, `
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CREATE TABLE IF NOT EXISTS chat_group_members (
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group_id INTEGER NOT NULL REFERENCES chat_groups(id) ON DELETE CASCADE,
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user_id INTEGER NOT NULL REFERENCES clients(id) ON DELETE CASCADE,
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joined_at TIMESTAMP NOT NULL DEFAULT NOW(),
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PRIMARY KEY (group_id, user_id)
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)
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`)
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if err != nil {
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panic(err)
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}
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}
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// DbSaveUserWithoutGroups saves user in db without groups and sets its id
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// return: error if not successful
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func DbSaveUserWithoutGroups(ctx context.Context, user *User) error {
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err := dbConn.QueryRow(ctx, `
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INSERT INTO clients (name, pass_hash, pronouns, color_red, color_green, color_blue, created_at)
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VALUES ($1, $2, $3, $4, $5, $6, $7)
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RETURNING id
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`, user.Name, user.PasswordHash, user.Pronouns, user.Color[0], user.Color[1], user.Color[2], user.CreatedAt).
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Scan(&user.Id)
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return err
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}
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// DbSetUserByName sets all fields of given struct with database's data using name
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// return: error if not successful
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func DbSetUserByName(ctx context.Context, user *User) error {
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err := dbConn.QueryRow(ctx, `
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SELECT id, name, pass_hash, pronouns, color_red, color_green, color_blue, created_at FROM clients WHERE name = $1
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`, user.Name).Scan(&user.Id, &user.Name, &user.PasswordHash, &user.Pronouns, &user.Color[0], &user.Color[1], &user.Color[2], &user.CreatedAt)
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if err != nil {
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return err
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}
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return DbSetUserGroups(ctx, user)
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}
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// DbSetUserByIdWithoutGroups sets all fields of given struct with database's data using id, excluding groups
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// return: error if not successful
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func DbSetUserByIdWithoutGroups(ctx context.Context, user *User) error {
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err := dbConn.QueryRow(ctx, `
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SELECT name, pass_hash, pronouns, color_red, color_green, color_blue, created_at FROM clients WHERE id = $1
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`, user.Id).Scan(&user.Name, &user.PasswordHash, &user.Pronouns, &user.Color[0], &user.Color[1], &user.Color[2], &user.CreatedAt)
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return err
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}
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// DbSetUserById sets all fields of given struct with database's data using id, including groups
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// return: error if not successful
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func DbSetUserById(ctx context.Context, user *User) error {
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err := DbSetUserByIdWithoutGroups(ctx, user)
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if err != nil {
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return err
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}
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return DbSetUserGroups(ctx, user)
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}
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// DbSaveGroupWithoutUsers saves group in db and sets its id, also adds the owner as first member
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// return: error if not successful
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func DbSaveGroupWithoutUsers(ctx context.Context, group *Group) error {
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err := dbConn.QueryRow(ctx, `
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INSERT INTO chat_groups (name, creator_id, owner_id, enable_client_colors, color_red, color_green, color_blue, created_at)
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VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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RETURNING id
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`, group.Name, group.CreatorId, group.OwnerId, group.EnableUserColors, group.Color[0], group.Color[1], group.Color[2], group.CreatedAt).
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Scan(&group.Id)
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if err != nil {
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return err
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}
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_, err = dbConn.Exec(ctx, `
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INSERT INTO chat_group_members (group_id, user_id, joined_at)
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VALUES ($1, $2, $3)
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`, group.Id, group.OwnerId, group.CreatedAt)
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return err
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}
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// DbDeleteGroup deletes given group by id
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// return: error if not successful
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func DbDeleteGroup(ctx context.Context, group *Group) error {
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_, err := dbConn.Exec(ctx, `
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DELETE FROM chat_groups WHERE id = $1
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`, group.Id)
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return err
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}
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// DbSetGroupByIdWithoutUsers sets all fields of given struct with database's data using id, populates Users map with member ids but not their data
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// return: error if not successful
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func DbSetGroupByIdWithoutUsers(ctx context.Context, group *Group) error {
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err := dbConn.QueryRow(ctx, `
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SELECT name, creator_id, owner_id, enable_client_colors, color_red, color_green, color_blue, created_at FROM chat_groups WHERE id = $1
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`, group.Id).Scan(&group.Name, &group.CreatorId, &group.OwnerId, &group.EnableUserColors, &group.Color[0], &group.Color[1], &group.Color[2], &group.CreatedAt)
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if err != nil {
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return err
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}
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rows, err := dbConn.Query(ctx, `
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SELECT user_id FROM chat_group_members WHERE group_id = $1
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`, group.Id)
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if err != nil {
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return err
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}
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defer rows.Close()
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group.Users = make(map[uint32]struct{})
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for rows.Next() {
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var userId uint32
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if err := rows.Scan(&userId); err != nil {
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return err
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}
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group.Users[userId] = struct{}{}
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}
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return rows.Err()
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}
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// DbSetGroupById sets all fields of given struct with database's data using id, including full member user data
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// return: error if not successful
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func DbSetGroupById(ctx context.Context, group *Group) error {
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err := DbSetGroupByIdWithoutUsers(ctx, group)
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if err != nil {
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return err
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}
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return DbSetGroupMemberUsers(ctx, group)
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}
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// DbSetGroupMemberUsers populates group's Users map with ids of all members from database
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// return: error if not successful
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func DbSetGroupMemberUsers(ctx context.Context, group *Group) error {
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rows, err := dbConn.Query(ctx, `
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SELECT user_id FROM chat_group_members WHERE group_id = $1
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`, group.Id)
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if err != nil {
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return err
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}
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defer rows.Close()
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group.Users = make(map[uint32]struct{})
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for rows.Next() {
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var userId uint32
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if err := rows.Scan(&userId); err != nil {
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return err
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}
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group.Users[userId] = struct{}{}
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}
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return rows.Err()
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}
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// DbAddUsersToGroup adds given users to group in db, silently ignores already existing members
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// return: error if not successful
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func DbAddUsersToGroup(ctx context.Context, groupId uint32, userIds *[MaxUsersInGroup]uint32) error {
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batch := &pgx.Batch{}
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now := time.Now()
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var count int
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for _, uid := range userIds {
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if uid == 0 {
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continue
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}
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batch.Queue(`
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INSERT INTO chat_group_members (group_id, user_id, joined_at)
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VALUES ($1, $2, $3)
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ON CONFLICT DO NOTHING
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`, groupId, uid, now)
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count++
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}
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br := dbConn.SendBatch(ctx, batch)
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defer br.Close()
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for range count {
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if _, err := br.Exec(); err != nil {
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return err
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}
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}
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return nil
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}
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// DbRemoveUsersFromGroup removes given users from group in db, silently ignores not existing members
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// return: deleted users count, error if not successful
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func DbRemoveUsersFromGroup(ctx context.Context, groupId uint32, userIds *[MaxUsersInGroup]uint32) (int, error) {
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batch := &pgx.Batch{}
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var count int
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for _, uid := range userIds {
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if uid == 0 {
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continue
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}
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batch.Queue(`
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DELETE FROM chat_group_members WHERE group_id = $1 AND user_id = $2
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`, groupId, uid)
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count++
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}
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br := dbConn.SendBatch(ctx, batch)
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defer br.Close()
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var deleted int
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for range count {
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tag, err := br.Exec()
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if err != nil {
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return deleted, err
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}
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deleted += int(tag.RowsAffected())
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}
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return deleted, nil
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}
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// DbSetUserGroups populates user's Groups map with ids of all groups the user belongs to from database
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// return: error if not successful
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func DbSetUserGroups(ctx context.Context, user *User) error {
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rows, err := dbConn.Query(ctx, `
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SELECT group_id FROM chat_group_members WHERE user_id = $1
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`, user.Id)
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if err != nil {
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return err
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}
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defer rows.Close()
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user.Groups = make(map[uint32]struct{})
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for rows.Next() {
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var groupId uint32
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if err := rows.Scan(&groupId); err != nil {
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return err
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}
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user.Groups[groupId] = struct{}{}
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}
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return rows.Err()
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}
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// DbSetGroupColor set group's color based on id
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// return: error if not successful
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func DbSetGroupColor(ctx context.Context, group *Group) error {
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_, err := dbConn.Exec(ctx, `
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UPDATE chat_groups SET color_red = $1, color_green = $2, color_blue = $3 WHERE id = $4
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`, group.Color[0], group.Color[1], group.Color[2], group.Id)
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return err
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}
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// DbSetGroupOwnerId set group's owner based on id
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// return: error if not successful
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func DbSetGroupOwnerId(ctx context.Context, group *Group) error {
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_, err := dbConn.Exec(ctx, `
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UPDATE chat_groups SET owner_id = $1 WHERE id = $2
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`, group.OwnerId, group.Id)
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return err
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}
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