Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/db/migrations/postgres/000046_create_users.up.sql

@@ -0,0 +1,88 @@
+CREATE TABLE IF NOT EXISTS users (
+    id VARCHAR(26) PRIMARY KEY,
+    createat bigint,
+    updateat bigint,
+    deleteat bigint,
+    username VARCHAR(64) UNIQUE,
+    password VARCHAR(128),
+    authdata VARCHAR(128) UNIQUE,
+    authservice VARCHAR(32),
+    email VARCHAR(128) UNIQUE,
+    emailverified boolean,
+    nickname VARCHAR(64),
+    firstname VARCHAR(64),
+    lastname VARCHAR(64),
+    roles VARCHAR(256),
+    allowmarketing boolean,
+    props VARCHAR(4000),
+    notifyprops VARCHAR(2000),
+    lastpasswordupdate bigint,
+    lastpictureupdate bigint,
+    failedattempts integer,
+    locale VARCHAR(5),
+    mfaactive boolean,
+    mfasecret VARCHAR(128)
+);
+
+ALTER TABLE users DROP COLUMN IF EXISTS lastactivityat;
+ALTER TABLE users DROP COLUMN IF EXISTS lastpingat;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS position VARCHAR(128);
+ALTER TABLE users ADD COLUMN IF NOT EXISTS timezone VARCHAR(256) DEFAULT '{"automaticTimezone":"","manualTimezone":"","useAutomaticTimezone":"true"}';
+ALTER TABLE users ALTER COLUMN position TYPE VARCHAR(128);
+
+DO $$
+	<< migrate_if_version_below_4100 >>
+DECLARE
+	current_db_version VARCHAR(100) := '';
+BEGIN
+	SELECT
+		value INTO current_db_version
+	FROM
+		systems
+	WHERE
+		name = 'Version';
+	IF (string_to_array(current_db_version, '.') < string_to_array('4.10.0', '.')) THEN	
+        UPDATE Users SET AuthData=LOWER(AuthData) WHERE AuthService = 'saml';
+	END IF;
+END migrate_if_version_below_4100
+$$;
+
+DO $$
+DECLARE 
+    column_exist boolean := false;
+BEGIN
+SELECT count(*) != 0 INTO column_exist
+    FROM information_schema.columns
+    WHERE table_name = 'users'
+    AND table_schema = current_schema()
+    AND column_name = 'roles'
+    AND NOT data_type = 'varchar(256)';
+IF column_exist THEN
+    ALTER TABLE users ALTER COLUMN roles TYPE varchar(256);
+END IF;
+END $$;
+
+CREATE INDEX IF NOT EXISTS idx_users_update_at ON users (updateat);
+CREATE INDEX IF NOT EXISTS idx_users_create_at ON users (createat);
+CREATE INDEX IF NOT EXISTS idx_users_delete_at ON users (deleteat);
+
+CREATE INDEX IF NOT EXISTS idx_users_email_lower_textpattern ON users (lower(email) text_pattern_ops);
+CREATE INDEX IF NOT EXISTS idx_users_username_lower_textpattern ON users (lower(username) text_pattern_ops);
+CREATE INDEX IF NOT EXISTS idx_users_nickname_lower_textpattern ON users (lower(nickname) text_pattern_ops);
+CREATE INDEX IF NOT EXISTS idx_users_firstname_lower_textpattern ON users (lower(firstname) text_pattern_ops);
+CREATE INDEX IF NOT EXISTS idx_users_lastname_lower_textpattern ON users (lower(lastname) text_pattern_ops);
+
+CREATE INDEX IF NOT EXISTS idx_users_all_txt ON users USING gin(to_tsvector('english', username || ' ' || firstname || ' ' || lastname || ' ' || nickname || ' ' || email));
+CREATE INDEX IF NOT EXISTS idx_users_all_no_full_name_txt ON users USING gin(to_tsvector('english', username || ' ' || nickname || ' ' || email));
+CREATE INDEX IF NOT EXISTS idx_users_names_txt ON users USING gin(to_tsvector('english', username || ' ' || firstname || ' ' || lastname || ' ' || nickname));
+CREATE INDEX IF NOT EXISTS idx_users_names_no_full_name_txt ON users USING gin(to_tsvector('english', username || ' ' || nickname));
+
+DROP INDEX IF EXISTS idx_users_email_lower;
+DROP INDEX IF EXISTS idx_users_username_lower;
+DROP INDEX IF EXISTS idx_users_nickname_lower;
+DROP INDEX IF EXISTS idx_users_firstname_lower;
+DROP INDEX IF EXISTS idx_users_lastname_lower;
+
+ALTER TABLE users ADD COLUMN IF NOT EXISTS remoteid VARCHAR(26);
+
+DROP INDEX IF EXISTS idx_users_email;