text: # Usage: 
  # 1) Create a database using the "CREATE DATABASE" mysql command.
  # 2) Then, execute this script from command prompt with a command like this:
  # mysql -h host -u user -p -D db_name < mysql.sql
  
  # create database timetracker character set = 'utf8mb4';
  
  # use timetracker;
  
  
  #
  # Structure for table tt_groups. A group is a unit of users for whom we are tracking work time.
  # This table stores settings common to all group members such as language, week start day, etc.
  #
  CREATE TABLE `tt_groups` (
    `id` int(11) NOT NULL auto_increment,                  # group id
    `parent_id` int(11) default NULL,                      # parent group id
    `org_id` int(11) default NULL,                         # organization id (id of top group)
    `group_key` varchar(32) default NULL,                  # group key
    `name` varchar(80) default NULL,                       # group name
    `description` varchar(255) default NULL,               # group description
    `currency` varchar(7) default NULL,                    # currency symbol
    `decimal_mark` char(1) NOT NULL default '.',           # separator in decimals
    `lang` varchar(10) NOT NULL default 'en',              # language
    `date_format` varchar(20) NOT NULL default '%Y-%m-%d', # date format
    `time_format` varchar(20) NOT NULL default '%H:%M',    # time format
    `week_start` smallint(2) NOT NULL default 0,           # Week start day, 0 == Sunday.
    `tracking_mode` smallint(2) NOT NULL default 1,        # tracking mode ("time", "projects" or "projects and tasks")
    `project_required` smallint(2) NOT NULL default 0,     # whether a project selection is required or optional
    `record_type` smallint(2) NOT NULL default 0,          # time record type ("start and finish", "duration", or both)
    `bcc_email` varchar(100) default NULL,                 # bcc email to copy all reports to
    `allow_ip` varchar(255) default NULL,                  # specification from where users are allowed access
    `password_complexity` varchar(64) default NULL,        # password example that defines required complexity
    `plugins` varchar(255) default NULL,                   # a list of enabled plugins for group
    `lock_spec` varchar(255) default NULL,                 # Cron specification for record locking,
                                                           # for example: "0 10 * * 1" for "weekly on Mon at 10:00".
    `holidays` text default NULL,                          # holidays specification
    `workday_minutes` smallint(4) default 480,             # number of work minutes in a regular working day
    `custom_logo` tinyint(4) default 0,                    # whether to use a custom logo or not
    `config` text default NULL,                            # miscellaneous group configuration settings
    `custom_css` text default NULL,                        # custom css for group
    `created` datetime default NULL,                       # creation timestamp
    `created_ip` varchar(45) default NULL,                 # creator ip
    `created_by` int(11) default NULL,                     # creator user_id
    `modified` datetime default NULL,                      # modification timestamp
    `modified_ip` varchar(45) default NULL,                # modifier ip
    `modified_by` int(11) default NULL,                    # modifier user_id
    `status` tinyint(4) default 1,                         # group status
    PRIMARY KEY (`id`)
  );
  
  
  #
  # Structure for table tt_roles. This table stores group roles.
  #
  CREATE TABLE `tt_roles` (
    `id` int(11) NOT NULL auto_increment,    # Role id. Identifies roles for all groups on the server.
    `group_id` int(11) NOT NULL,             # Group id the role is defined for.
    `org_id` int(11) default NULL,           # Organization id.
    `name` varchar(80) default NULL,         # Role name - custom role name. In case we are editing a
                                             # predefined role (USER, etc.), we can rename the role here.
    `description` varchar(255) default NULL, # Role description.
    `rank` int(11) default 0,                # Role rank, an integer value between 0-512. Predefined role ranks:
                                             # User - 4, Supervisor - 12, Client - 16,
                                             # Co-manager - 68, Manager - 324, Top manager - 512.
                                             # Rank is used to determine what "lesser roles" are in each group
                                             # for situations such as "manage_users".
    `rights` text default NULL,              # Comma-separated list of rights assigned to a role.
                                             # NULL here for predefined roles (4, 16, 68, 324 - manager)
                                             # means a hard-coded set of default access rights.
    `status` tinyint(4) default 1,           # Role status.
    PRIMARY KEY  (`id`)
  );
  
  # Create an index that guarantees unique active and inactive role ranks in each group.
  create unique index role_idx on tt_roles(group_id, `rank`, status);
  
  # Insert site-wide roles - site administrator and top manager.
  INSERT INTO `tt_roles` (`group_id`, `name`, `rank`, `rights`) VALUES (0, 'Site administrator', 1024, 'administer_site');
  INSERT INTO `tt_roles` (`group_id`, `name`, `rank`, `rights`) VALUES (0, 'Top manager', 512, 'track_own_time,track_own_expenses,view_own_reports,view_own_charts,view_own_projects,view_own_tasks,manage_own_settings,view_users,view_client_reports,view_client_invoices,track_time,track_expenses,view_reports,approve_reports,approve_timesheets,view_charts,view_own_clients,override_punch_mode,override_own_punch_mode,override_date_lock,override_own_date_lock,swap_roles,update_work,manage_own_account,manage_users,manage_projects,manage_tasks,manage_custom_fields,manage_clients,manage_invoices,override_allow_ip,manage_basic_settings,view_all_reports,manage_work,bid_on_work,manage_features,manage_advanced_settings,manage_roles,export_data,approve_all_reports,approve_own_timesheets,manage_subgroups,view_client_unapproved,delete_group');
  
  
  #
  # Structure for table tt_users. This table is used to store user properties.
  #
  CREATE TABLE `tt_users` (
    `id` int(11) NOT NULL auto_increment,            # user id
    `login` varchar(50) COLLATE utf8mb4_bin NOT NULL,# user login
    `password` varchar(50) default NULL,             # password hash
    `name` varchar(100) default NULL,                # user name
    `group_id` int(11) NOT NULL,                     # group id
    `org_id` int(11) default NULL,                   # organization id
    `role_id` int(11) default NULL,                  # role id
    `client_id` int(11) default NULL,                # client id for "client" user role
    `rate` float(6,2) NOT NULL default '0.00',       # default hourly rate
    `quota_percent` float(6,2) NOT NULL default '100.00', # percent of time quota
    `email` varchar(100) default NULL,               # user email
    `created` datetime default NULL,                 # creation timestamp
    `created_ip` varchar(45) default NULL,           # creator ip
    `created_by` int(11) default NULL,               # creator user_id (null for self)
    `modified` datetime default NULL,                # modification timestamp
    `modified_ip` varchar(45) default NULL,          # modifier ip
    `modified_by` int(11) default NULL,              # modifier user_id
    `accessed` datetime default NULL,                # last access timestamp
    `accessed_ip` varchar(45) default NULL,          # last access ip
    `status` tinyint(4) default 1,                   # user status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique active and inactive logins.
  create unique index login_idx on tt_users(login, status);
  
  # Create admin account with password 'secret'. Admin is a superuser who can create groups.
  DELETE from `tt_users` WHERE login = 'admin';
  INSERT INTO `tt_users` (`login`, `password`, `name`, `group_id`, `role_id`) VALUES ('admin', md5('secret'), 'Admin', '0', (select id from tt_roles where `rank` = 1024));
  
  
  #
  # Structure for table tt_projects.
  #
  CREATE TABLE `tt_projects` (
    `id` int(11) NOT NULL auto_increment,            # project id
    `group_id` int(11) NOT NULL,                     # group id
    `org_id` int(11) default NULL,                   # organization id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # project name
    `description` varchar(255) default NULL,         # project description
    `tasks` text default NULL,                       # comma-separated list of task ids associated with this project
    `status` tinyint(4) default 1,                   # project status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique active and inactive projects per group.
  create unique index project_idx on tt_projects(group_id, name, status);
  
  
  #
  # Structure for table tt_tasks.
  #
  CREATE TABLE `tt_tasks` (
    `id` int(11) NOT NULL auto_increment,            # task id
    `group_id` int(11) NOT NULL,                     # group id
    `org_id` int(11) default NULL,                   # organization id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # task name
    `description` varchar(255) default NULL,         # task description
    `status` tinyint(4) default 1,                   # task status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique active and inactive tasks per group.
  create unique index task_idx on tt_tasks(group_id, name, status);
  
  
  #
  # Structure for table tt_user_project_binds. This table maps users to assigned projects.
  #
  CREATE TABLE `tt_user_project_binds` (
    `id` int(11) NOT NULL auto_increment, # bind id
    `user_id` int(11) NOT NULL,           # user id
    `project_id` int(11) NOT NULL,        # project id
    `group_id` int(11) default NULL,      # group id
    `org_id` int(11) default NULL,        # organization id
    `rate` float(6,2) default '0.00',     # rate for this user when working on this project
    `status` tinyint(4) default 1,        # bind status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique user to project binds.
  create unique index bind_idx on tt_user_project_binds(user_id, project_id);
  
  
  #
  # Structure for table tt_project_task_binds. This table maps projects to assigned tasks.
  #
  CREATE TABLE `tt_project_task_binds` (
    `project_id` int(11) NOT NULL,        # project id
    `task_id` int(11) NOT NULL,           # task id
    `group_id` int(11) default NULL,      # group id
    `org_id` int(11) default NULL         # organization id
  );
  
  # Indexes for tt_project_task_binds.
  create index project_idx on tt_project_task_binds(project_id);
  create index task_idx on tt_project_task_binds(task_id);
  create unique index project_task_idx on tt_project_task_binds(project_id, task_id);
  
  
  #
  # Structure for table tt_log. This is the table where time entries for users are stored.
  # If you use custom fields, additional info for each record may exist in tt_custom_field_log.
  #
  CREATE TABLE `tt_log` (
    `id` bigint NOT NULL auto_increment,             # time record id
    `user_id` int(11) NOT NULL,                      # user id
    `group_id` int(11) default NULL,                 # group id
    `org_id` int(11) default NULL,                   # organization id
    `date` date NOT NULL,                            # date the record is for
    `start` time default NULL,                       # record start time (for example, 09:00)
    `duration` time default NULL,                    # record duration (for example, 1 hour)
    `client_id` int(11) default NULL,                # client id
    `project_id` int(11) default NULL,               # project id
    `task_id` int(11) default NULL,                  # task id
    `timesheet_id` int(11) default NULL,             # timesheet id
    `invoice_id` int(11) default NULL,               # invoice id
    `comment` text,                                  # user provided comment for time record
    `billable` tinyint(4) default 0,                 # whether the record is billable or not
    `approved` tinyint(4) default 0,                 # whether the record is approved
    `paid` tinyint(4) default 0,                     # whether the record is paid
    `created` datetime default NULL,                 # creation timestamp
    `created_ip` varchar(45) default NULL,           # creator ip
    `created_by` int(11) default NULL,               # creator user_id
    `modified` datetime default NULL,                # modification timestamp
    `modified_ip` varchar(45) default NULL,          # modifier ip
    `modified_by` int(11) default NULL,              # modifier user_id
    `status` tinyint(4) default 1,                   # time record status
    PRIMARY KEY (`id`)
  );
  
  # Create indexes on tt_log for performance.
  create index date_idx on tt_log(date);
  create index user_idx on tt_log(user_id);
  create index group_idx on tt_log(group_id);
  create index client_idx on tt_log(client_id);
  create index invoice_idx on tt_log(invoice_id);
  create index project_idx on tt_log(project_id);
  create index task_idx on tt_log(task_id);
  create index timesheet_idx on tt_log(timesheet_id);
  
  
  #
  # Structure for table tt_invoices. Invoices are issued to clients for billable work.
  #
  CREATE TABLE `tt_invoices` (
    `id` int(11) NOT NULL auto_increment,            # invoice id
    `group_id` int(11) NOT NULL,                     # group id
    `org_id` int(11) default NULL,                   # organization id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # invoice name
    `date` date NOT NULL,                            # invoice date
    `client_id` int(11) NOT NULL,                    # client id
    `status` tinyint(4) default 1,                   # invoice status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique invoice names per group.
  create unique index name_idx on tt_invoices(group_id, name, status);
  
  
  #
  # Structure for table tt_tmp_refs. Used for reset password mechanism.
  #
  CREATE TABLE `tt_tmp_refs` (
    `created` datetime default NULL,                 # creation timestamp
    `ref` char(32) NOT NULL default '',              # unique reference for user, used in urls
    `user_id` int(11) NOT NULL                       # user id
  );
  
  
  #
  # Structure for table tt_fav_reports. Favorite reports are pre-configured report configurations.
  #
  CREATE TABLE `tt_fav_reports` (
    `id` int(11) NOT NULL auto_increment,                  # favorite report id
    `name` varchar(200) NOT NULL,                          # favorite report name
    `user_id` int(11) NOT NULL,                            # user id favorite report belongs to
    `group_id` int(11) default NULL,                       # group id
    `org_id` int(11) default NULL,                         # organization id
    `report_spec` text default NULL,                       # future replacement field for all report settings
    `client_id` int(11) default NULL,                      # client id (if selected)
    `project_id` int(11) default NULL,                     # project id (if selected)
    `task_id` int(11) default NULL,                        # task id (if selected)
    `billable` tinyint(4) default NULL,                    # whether to include billable, not billable, or all records
    `approved` tinyint(4) default NULL,                    # whether to include approved, unapproved, or all records
    `invoice` tinyint(4) default NULL,                     # whether to include invoiced, not invoiced, or all records
    `timesheet` tinyint(4) default NULL,                   # include records with a specific timesheet status, or all records
    `paid_status` tinyint(4) default NULL,                 # whether to include paid, not paid, or all records
    `users` text default NULL,                             # Comma-separated list of user ids. Nothing here means "all" users.
    `period` tinyint(4) default NULL,                      # selected period type for report
    `period_start` date default NULL,                      # period start
    `period_end` date default NULL,                        # period end
    `show_client` tinyint(4) NOT NULL default 0,           # whether to show client column
    `show_invoice` tinyint(4) NOT NULL default 0,          # whether to show invoice column
    `show_paid` tinyint(4) NOT NULL default 0,             # whether to show paid column
    `show_ip` tinyint(4) NOT NULL default 0,               # whether to show ip column
    `show_project` tinyint(4) NOT NULL default 0,          # whether to show project column
    `show_timesheet` tinyint(4) NOT NULL default 0,        # whether to show timesheet column
    `show_start` tinyint(4) NOT NULL default 0,            # whether to show start field
    `show_duration` tinyint(4) NOT NULL default 0,         # whether to show duration field
    `show_cost` tinyint(4) NOT NULL default 0,             # whether to show cost field
    `show_task` tinyint(4) NOT NULL default 0,             # whether to show task column
    `show_end` tinyint(4) NOT NULL default 0,              # whether to show end field
    `show_note` tinyint(4) NOT NULL default 0,             # whether to show note column
    `show_approved` tinyint(4) NOT NULL default 0,         # whether to show approved column
    `show_work_units` tinyint(4) NOT NULL default 0,       # whether to show work units
    `show_totals_only` tinyint(4) NOT NULL default 0,      # whether to show totals only
    `group_by1` varchar(20) default NULL,                  # group by field 1
    `group_by2` varchar(20) default NULL,                  # group by field 2
    `group_by3` varchar(20) default NULL,                  # group by field 3
    `status` tinyint(4) default 1,                         # favorite report status
    PRIMARY KEY (`id`)
  );
  
  
  #
  # Structure for table tt_cron. It is used to email favorite reports on schedule.
  #
  CREATE TABLE `tt_cron` (
    `id` int(11) NOT NULL auto_increment,         # entry id
    `group_id` int(11) NOT NULL,                  # group id
    `org_id` int(11) default NULL,                # organization id
    `cron_spec` varchar(255) NOT NULL,            # cron specification, "0 1 * * *" for "daily at 01:00"
    `last` int(11) default NULL,                  # UNIX timestamp of when job was last run
    `next` int(11) default NULL,                  # UNIX timestamp of when to run next job
    `report_id` int(11) default NULL,             # report id from tt_fav_reports, a report to mail on schedule
    `email` varchar(100) default NULL,            # email to send results to
    `cc` varchar(100) default NULL,               # cc email to send results to
    `subject` varchar(100) default NULL,          # email subject
    `comment` text,                               # user provided comment for notification
    `report_condition` varchar(255) default NULL, # report condition, "count > 0" for sending not empty reports
    `status` tinyint(4) default 1,                # entry status
    PRIMARY KEY (`id`)
  );
  
  
  #
  # Structure for table tt_clients. A client is an entity for whom work is performed and who may be invoiced.
  #
  CREATE TABLE `tt_clients` (
    `id` int(11) NOT NULL AUTO_INCREMENT,            # client id
    `group_id` int(11) NOT NULL,                     # group id
    `org_id` int(11) default NULL,                   # organization id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # client name
    `address` varchar(255) default NULL,             # client address
    `tax` float(6,2) default '0.00',                 # applicable tax for this client
    `projects` text default NULL,                    # comma-separated list of project ids assigned to this client
    `status` tinyint(4) default 1,                   # client status
    PRIMARY KEY (`id`)
  );
  
  # Create an index that guarantees unique active and inactive clients per group.
  create unique index client_name_idx on tt_clients(group_id, name, status);
  
  
  #
  # Structure for table tt_client_project_binds. This table maps clients to assigned projects.
  #
  CREATE TABLE `tt_client_project_binds` (
    `client_id` int(11) NOT NULL,                    # client id
    `project_id` int(11) NOT NULL,                   # project id
    `group_id` int(11) default NULL,                 # group id
    `org_id` int(11) default NULL                    # organization id
  );
  
  # Indexes for tt_client_project_binds.
  create index client_idx on tt_client_project_binds(client_id);
  create index project_idx on tt_client_project_binds(project_id);
  create unique index client_project_idx on tt_client_project_binds(client_id, project_id);
  
  
  #
  # Structure for table tt_config. This table is used to store configuration info for users.
  # For example, last_report_email parameter stores an email for user last report was emailed to.
  #
  CREATE TABLE `tt_config` (
    `user_id` int(11) NOT NULL,            # user id
    `group_id` int(11) default NULL,       # group id
    `org_id` int(11) default NULL,         # organization id
    `param_name` varchar(32) NOT NULL,     # parameter name
    `param_value` varchar(80) default NULL # parameter value
  );
  
  # Create an index that guarantees unique parameter names per user.
  create unique index param_idx on tt_config(user_id, param_name);
  
  
  # Below are the tables used by CustomFields plugin.
  
  #
  # Structure for table tt_custom_fields. This table contains definitions of custom fields.
  #
  CREATE TABLE `tt_custom_fields` (
    `id` int(11) NOT NULL auto_increment,    # custom field id
    `group_id` int(11) NOT NULL,             # group id
    `org_id` int(11) default NULL,           # organization id
    `entity_type` tinyint(4) default 1,      # type of entity custom field is associated with (time, user, project, task, etc.)
    `type` tinyint(4) NOT NULL default 0,    # custom field type (text or dropdown)
    `label` varchar(32) NOT NULL default '', # custom field label
    `required` tinyint(4) default 0,         # whether this custom field is mandatory for time records
    `status` tinyint(4) default 1,           # custom field status
    PRIMARY KEY  (`id`)
  );
  
  
  #
  # Structure for table tt_custom_field_options. This table defines options for dropdown custom fields.
  #
  CREATE TABLE `tt_custom_field_options` (
    `id` int(11) NOT NULL auto_increment,    # option id
    `group_id` int(11) default NULL,         # group id
    `org_id` int(11) default NULL,           # organization id
    `field_id` int(11) NOT NULL,             # custom field id
    `value` varchar(32) NOT NULL default '', # option value
    `status` tinyint(4) default 1,           # option status
    PRIMARY KEY  (`id`)
  );
  
  
  #
  # Structure for table tt_custom_field_log.
  # This table supplements tt_log and contains custom field values for records.
  #
  CREATE TABLE `tt_custom_field_log` (
    `id` bigint NOT NULL auto_increment, # custom field log id
    `group_id` int(11) default NULL,     # group id
    `org_id` int(11) default NULL,       # organization id
    `log_id` bigint NOT NULL,            # id of a record in tt_log this record corresponds to
    `field_id` int(11) NOT NULL,         # custom field id
    `option_id` int(11) default NULL,    # Option id. Used for dropdown custom fields.
    `value` varchar(255) default NULL,   # Text value. Used for text custom fields.
    `status` tinyint(4) default 1,       # custom field log entry status
    PRIMARY KEY  (`id`)
  );
  
  create index log_idx on tt_custom_field_log(log_id);
  
  
  #
  # Structure for table tt_entity_custom_fields.
  # This table stores custom field values for entities such as users and projects
  # except for "time" entity (and possibly "expense" in future).
  # "time" custom fields are kept separately in tt_custom_field_log
  # because tt_log (and tt_custom_field_log) can grow very large.
  #
  CREATE TABLE `tt_entity_custom_fields` (
    `id` int(10) unsigned NOT NULL auto_increment, # record id in this table
    `group_id` int(10) unsigned NOT NULL,          # group id
    `org_id` int(10) unsigned NOT NULL,            # organization id
    `entity_type` tinyint(4) NOT NULL,             # entity type
    `entity_id` int(10) unsigned NOT NULL,         # entity id this record corresponds to
    `field_id` int(10) unsigned NOT NULL,          # custom field id
    `option_id` int(10) unsigned default NULL,     # Option id. Used for dropdown custom fields.
    `value` varchar(255) default NULL,             # Text value. Used for text custom fields.
    `created` datetime default NULL,               # creation timestamp
    `created_ip` varchar(45) default NULL,         # creator ip
    `created_by` int(10) unsigned default NULL,    # creator user_id
    `modified` datetime default NULL,              # modification timestamp
    `modified_ip` varchar(45) default NULL,        # modifier ip
    `modified_by` int(10) unsigned default NULL,   # modifier user_id
    `status` tinyint(4) default 1,                 # record status
    PRIMARY KEY  (`id`)
  );
  
  # Create an index that guarantees unique custom fields per entity.
  create unique index entity_idx on tt_entity_custom_fields(entity_type, entity_id, field_id);
  
  
  #
  # Structure for table tt_expense_items.
  # This table lists expense items.
  #
  CREATE TABLE `tt_expense_items` (
    `id` bigint NOT NULL auto_increment,    # expense item id
    `date` date NOT NULL,                   # date the record is for
    `user_id` int(11) NOT NULL,             # user id the expense item is reported by
    `group_id` int(11) default NULL,        # group id
    `org_id` int(11) default NULL,          # organization id
    `client_id` int(11) default NULL,       # client id
    `project_id` int(11) default NULL,      # project id
    `name` text NOT NULL,                   # expense item name (what is an expense for)
    `cost` decimal(10,2) default '0.00',    # item cost (including taxes, etc.)
    `invoice_id` int(11) default NULL,      # invoice id
    `approved` tinyint(4) default 0,        # whether the item is approved
    `paid` tinyint(4) default 0,            # whether the item is paid
    `created` datetime default NULL,        # creation timestamp
    `created_ip` varchar(45) default NULL,  # creator ip
    `created_by` int(11) default NULL,      # creator user_id
    `modified` datetime default NULL,       # modification timestamp
    `modified_ip` varchar(45) default NULL, # modifier ip
    `modified_by` int(11) default NULL,     # modifier user_id
    `status` tinyint(4) default 1,          # item status
    PRIMARY KEY  (`id`)
  );
  
  # Create indexes on tt_expense_items for performance.
  create index date_idx on tt_expense_items(date);
  create index user_idx on tt_expense_items(user_id);
  create index group_idx on tt_expense_items(group_id);
  create index client_idx on tt_expense_items(client_id);
  create index project_idx on tt_expense_items(project_id);
  create index invoice_idx on tt_expense_items(invoice_id);
  
  
  #
  # Structure for table tt_predefined_expenses.
  # This table keeps names and costs for predefined expenses.
  #
  CREATE TABLE `tt_predefined_expenses` (
    `id` int(11) NOT NULL auto_increment, # predefined expense id
    `group_id` int(11) NOT NULL,          # group id
    `org_id` int(11) default NULL,        # organization id
    `name` varchar(255) NOT NULL,         # predefined expense name, such as mileage
    `cost` decimal(10,2) default '0.00',  # cost for one unit
    PRIMARY KEY  (`id`)
  );
  
  
  #
  # Structure for table tt_monthly_quotas.
  # This table keeps monthly work hour quotas for groups.
  #
  CREATE TABLE `tt_monthly_quotas` (
    `group_id` int(11) NOT NULL,            # group id
    `org_id` int(11) default NULL,          # organization id
    `year` smallint(5) UNSIGNED NOT NULL,   # quota year
    `month` tinyint(3) UNSIGNED NOT NULL,   # quota month
    `minutes` int(11) default NULL,         # quota in minutes in specified month and year
    PRIMARY KEY (`group_id`,`year`,`month`)
  );
  
  
  #
  # Structure for table tt_timesheets. This table keeps timesheet related information.
  #
  CREATE TABLE `tt_timesheets` (
    `id` int(11) NOT NULL auto_increment,            # timesheet id
    `user_id` int(11) NOT NULL,                      # user id
    `group_id` int(11) default NULL,                 # group id
    `org_id` int(11) default NULL,                   # organization id
    `client_id` int(11) default NULL,                # client id
    `project_id` int(11) default NULL,               # project id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # timesheet name
    `comment` text,                                  # timesheet comment
    `start_date` date NOT NULL,                      # timesheet start date
    `end_date` date NOT NULL,                        # timesheet end date
    `submit_status` tinyint(4) default NULL,         # submit status
    `approve_status` tinyint(4) default NULL,        # approve status
    `approve_comment` text,                          # approve comment
    `created` datetime default NULL,                 # creation timestamp
    `created_ip` varchar(45) default NULL,           # creator ip
    `created_by` int(11) default NULL,               # creator user_id
    `modified` datetime default NULL,                # modification timestamp
    `modified_ip` varchar(45) default NULL,          # modifier ip
    `modified_by` int(11) default NULL,              # modifier user_id
    `status` tinyint(4) default 1,                   # timesheet status
    PRIMARY KEY (`id`)
  );
  
  
  #
  # Structure for table tt_templates.
  # This table keeps templates used in groups.
  #
  CREATE TABLE `tt_templates` (
    `id` int(11) NOT NULL auto_increment,   # template id
    `group_id` int(11) default NULL,        # group id
    `org_id` int(11) default NULL,          # organization id
    `name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # template name
    `description` varchar(255) default NULL,         # template description
    `content` text,                         # template content
    `created` datetime default NULL,        # creation timestamp
    `created_ip` varchar(45) default NULL,  # creator ip
    `created_by` int(11) default NULL,      # creator user_id
    `modified` datetime default NULL,       # modification timestamp
    `modified_ip` varchar(45) default NULL, # modifier ip
    `modified_by` int(11) default NULL,     # modifier user_id
    `status` tinyint(4) default 1,          # template status
    PRIMARY KEY  (`id`)
  );
  
  
  #
  # Structure for table tt_project_template_binds. This table maps projects to templates.
  #
  CREATE TABLE `tt_project_template_binds` (
    `project_id` int(10) unsigned NOT NULL,        # project id
    `template_id` int(10) unsigned NOT NULL,       # template id
    `group_id` int(10) unsigned NOT NULL,          # group id
    `org_id` int(10) unsigned NOT NULL             # organization id
  );
  
  # Indexes for tt_project_template_binds.
  create index project_idx on tt_project_template_binds(project_id);
  create index template_idx on tt_project_template_binds(template_id);
  create unique index project_template_idx on tt_project_template_binds(project_id, template_id);
  
  
  #
  # Structure for table tt_files.
  # This table keeps file attachment information.
  #
  CREATE TABLE `tt_files` (
    `id` int(10) unsigned NOT NULL auto_increment, # file id
    `group_id` int(10) unsigned,                   # group id
    `org_id` int(10) unsigned,                     # organization id
    `remote_id` bigint(20) unsigned,               # file id in storage facility
    `file_key` varchar(32),                        # file key
    `entity_type` varchar(32),                     # type of entity file is associated with (project, task, etc.)
    `entity_id` int(10) unsigned,                  # entity id
    `file_name` varchar(80) COLLATE utf8mb4_bin NOT NULL, # file name
    `description` varchar(255) default NULL,       # file description
    `created` datetime default NULL,               # creation timestamp
    `created_ip` varchar(45) default NULL,         # creator ip
    `created_by` int(10) unsigned,                 # creator user_id
    `modified` datetime default NULL,              # modification timestamp
    `modified_ip` varchar(45) default NULL,        # modifier ip
    `modified_by` int(10) unsigned,                # modifier user_id
    `status` tinyint(1) default 1,                 # file status
    PRIMARY KEY  (`id`)
  );
  
  
  #
  # Structure for table tt_work_currencies.
  # This table keeps currencies supported by remote work plugin.
  #
  CREATE TABLE `tt_work_currencies` (
    `id` int(10) unsigned NOT NULL,    # currency id
    `name` varchar(10) NOT NULL,       # currency name (USD, CAD, etc.)
    PRIMARY KEY  (`id`)
  );
  
  # Create an index that guarantees unique work currencies.
  create unique index currency_idx on tt_work_currencies(`name`);
  
  INSERT INTO `tt_work_currencies` (`id`, `name`) VALUES ('1', 'USD'), ('2', 'CAD'), ('3', 'AUD'), ('4', 'EUR'), ('5', 'NZD');
  
  
  #
  # Structure for table tt_work_categories.
  # This table keeps work categories supported by remote work plugin.
  #
  CREATE TABLE `tt_work_categories` (
    `id` int(10) unsigned NOT NULL,     # Category id.
    `parents` text default NULL,        # Comma-separated list of parent ids associated with this category.
    `name` varchar(64) NOT NULL,        # English category name.
    `name_localized` text default NULL, # Comma-separated list of localized category names in other languages.
                                        # Example: es:Codificación,ru:Кодирование.
    PRIMARY KEY  (`id`)
  );
  
  # Insert some default categories. Table content to be updated at run time, though.
  INSERT INTO `tt_work_categories` (`id`, `parents`, `name`, `name_localized`) VALUES ('1', NULL, 'Coding', 'es:Codificación,ru:Кодирование');
  INSERT INTO `tt_work_categories` (`id`, `parents`, `name`, `name_localized`) VALUES ('2', NULL, 'Other', 'es:Otra,ru:Другое');
  INSERT INTO `tt_work_categories` (`id`, `parents`, `name`, `name_localized`) VALUES ('3', '1', 'PHP', NULL);
  INSERT INTO `tt_work_categories` (`id`, `parents`, `name`, `name_localized`) VALUES ('4', '1', 'C/C++', NULL);
  
  
  #
  # Structure for table tt_site_config. This table stores configuration data
  # for Time Tracker site as a whole.
  # For example, database version, code version, site language, etc.
  #
  CREATE TABLE `tt_site_config` (
    `param_name` varchar(32) NOT NULL, # parameter name
    `param_value` text default NULL,   # parameter value
    `created` datetime default NULL,   # creation timestamp
    `modified` datetime default NULL,  # modification timestamp
    PRIMARY KEY  (`param_name`)
  );
  
  INSERT INTO `tt_site_config` (`param_name`, `param_value`, `created`) VALUES ('version_db', '1.19.23', now()); # TODO: change when structure changes.
  