implement a bit of the register.php call (and the DB schema)

server/db/database.go

@@ -2,10 +2,70 @@ package db
 
 import (
 	scn "blackforestbytes.com/simplecloudnotifier"
+	"context"
 	"database/sql"
+	_ "embed"
+	"errors"
+	"fmt"
 	_ "github.com/mattn/go-sqlite3"
 )
 
-func NewDatabase(conf scn.Config) (*sql.DB, error) {
-	return sql.Open("sqlite3", conf.DBFile)
+//go:embed schema_1.0.sql
+var schema_1_0 string
+
+//go:embed schema_2.0.sql
+var schema_2_0 string
+
+func NewDatabase(ctx context.Context, conf scn.Config) (*sql.DB, error) {
+	db, err := sql.Open("sqlite3", conf.DBFile)
+	if err != nil {
+		return nil, err
+	}
+
+	schema, err := getSchemaFromDB(ctx, db)
+	if schema == 0 {
+
+		_, err = db.ExecContext(ctx, schema_1_0)
+		if err != nil {
+			return nil, err
+		}
+
+		return db, nil
+
+	} else if schema == 1 {
+		return nil, errors.New("cannot autom. upgrade schema 1")
+	} else if schema == 2 {
+		return db, nil
+	} else {
+		return nil, errors.New(fmt.Sprintf("Unknown DB schema: %d", schema))
+	}
+
+}
+
+func getSchemaFromDB(ctx context.Context, db *sql.DB) (int, error) {
+
+	r1, err := db.QueryContext(ctx, "SELECT name FROM sqlite_master WHERE type='table' AND name='meta'")
+	if err != nil {
+		return 0, err
+	}
+
+	if !r1.Next() {
+		return 0, nil
+	}
+
+	r2, err := db.QueryContext(ctx, "SELECT value_int FROM meta WHERE key='schema'")
+	if err != nil {
+		return 0, err
+	}
+	if !r2.Next() {
+		return 0, errors.New("no schema entry in meta table")
+	}
+
+	var schema int
+	err = r2.Scan(&schema)
+	if err != nil {
+		return 0, err
+	}
+
+	return schema, nil
 }

server/db/schema_1.0.sql

@@ -0,0 +1,38 @@
+DROP TABLE IF EXISTS `users`;
+CREATE TABLE `users`
+(
+    `user_id`            INT(11)         NOT NULL   AUTO_INCREMENT,
+    `user_key`           VARCHAR(64)     NOT NULL,
+    `fcm_token`          VARCHAR(256)        NULL   DEFAULT NULL,
+    `messages_sent`      INT(11)         NOT NULL   DEFAULT '0',
+    `timestamp_created`  DATETIME        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
+    `timestamp_accessed` DATETIME            NULL   DEFAULT NULL,
+
+    `quota_today`        INT(11)         NOT NULL   DEFAULT '0',
+    `quota_day`          DATE                NULL   DEFAULT NULL,
+
+    `is_pro`             BIT             NOT NULL   DEFAULT 0,
+    `pro_token`          VARCHAR(256)        NULL   DEFAULT NULL,
+
+    PRIMARY KEY (`user_id`)
+);
+
+DROP TABLE IF EXISTS `messages`;
+CREATE TABLE `messages`
+(
+    `scn_message_id`     INT(11)         NOT NULL   AUTO_INCREMENT,
+    `sender_user_id`     INT(11)         NOT NULL,
+
+    `timestamp_real`     DATETIME        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
+    `ack`                TINYINT(1)      NOT NULL   DEFAULT 0,
+
+    `title`              VARCHAR(256)    NOT NULL,
+    `content`            LONGTEXT            NULL,
+    `priority`           INT(11)         NOT NULL,
+    `sendtime`           BIGINT UNSIGNED NOT NULL,
+
+    `fcm_message_id`     VARCHAR(256)        NULL,
+    `usr_message_id`     VARCHAR(256)        NULL,
+
+    PRIMARY KEY (`scn_message_id`)
+);

server/db/schema_2.0.sql

@@ -0,0 +1,47 @@
+CREATE TABLE `users`
+(
+    `user_id`            INTEGER                AUTO_INCREMENT,
+    `user_key`           TEXT         NOT NULL,
+    `fcm_token`          TEXT             NULL  DEFAULT NULL,
+    `messages_sent`      INTEGER     NOT NULL   DEFAULT '0',
+    `timestamp_created`  TEXT        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
+    `timestamp_accessed` TEXT            NULL   DEFAULT NULL,
+
+    `quota_today`        INTEGER     NOT NULL   DEFAULT '0',
+    `quota_day`          TEXT            NULL   DEFAULT NULL,
+
+    `is_pro`             INTEGER     NOT NULL   DEFAULT 0,
+    `pro_token`          TEXT            NULL   DEFAULT NULL,
+
+    PRIMARY KEY (`user_id`)
+);
+
+CREATE TABLE `messages`
+(
+    `scn_message_id`     INTEGER                AUTO_INCREMENT,
+    `sender_user_id`     INTEGER     NOT NULL,
+
+    `timestamp_real`     TEXT        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
+    `ack`                INTEGER     NOT NULL   DEFAULT 0,
+
+    `title`              TEXT        NOT NULL,
+    `content`            TEXT            NULL,
+    `priority`           INTEGER     NOT NULL,
+    `sendtime`           INTEGER     NOT NULL,
+
+    `fcm_message_id`     TEXT            NULL,
+    `usr_message_id`     TEXT            NULL,
+
+    PRIMARY KEY (`scn_message_id`)
+);
+
+CREATE TABLE `meta`
+(
+    `key`         TEXT     NOT NULL,
+    `value_int`   INTEGER      NULL,
+    `value_txt`   TEXT         NULL,
+
+    PRIMARY KEY (`key`)
+);
+
+INSERT INTO meta (key, value_int) VALUES ('schema', 2)