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2026-04-19 16:42:41 +03:00
commit e82fb947be
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--- a/internal/commands/commands.go
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+/*
+ * Copyright 2026 Safronov Grigorii
+ *
+ * Licensed under the CDDL, Version 1.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ * https://opensource.org/licenses/CDDL-1.0
+ */
+
+// Файл: internal/commands/commands.go
+// Назначение: Реализация MongoDB-подобных команд CRUD и команд управления кластером.
+// Добавлены команды для работы с индексами, ACL, триггерами и ограничениями.
+
+package commands
+
+import (
+    "futriis/pkg/utils"
+)
+
+// ShowHelp отображает справку по всем доступным командам
+func ShowHelp() {
+    helpText := `
+=== FUTRIIS DATABASE COMMANDS ===
+
+DATABASE MANAGEMENT:
+  use <db>                     - Switch to database
+  show dbs                     - List all databases
+  show collections             - List collections in current database
+
+COLLECTION OPERATIONS:
+  db.createCollection("<name>") - Create new collection
+  db.<collection>.insert({...}) - Insert document into collection
+  db.<collection>.find({_id: "..."}) - Find document by ID
+  db.<collection>.find()       - Find all documents in collection
+  db.<collection>.findByIndex("<index>", "<value>") - Find by secondary index
+  db.<collection>.update({_id: "..."}, {...}) - Update document
+  db.<collection>.remove({_id: "..."}) - Delete document
+
+INDEX MANAGEMENT:
+  db.<collection>.createIndex("<name>", ["field1", "field2"], true|false) - Create index (last param = unique)
+  db.<collection>.dropIndex("<name>") - Drop index
+  db.<collection>.listIndexes() - List all indexes
+
+CONSTRAINTS:
+  db.<collection>.addRequired("<field>") - Add required field constraint
+  db.<collection>.addUnique("<field>") - Add unique constraint
+  db.<collection>.addMin("<field>", <value>) - Add minimum value constraint
+  db.<collection>.addMax("<field>", <value>) - Add maximum value constraint
+  db.<collection>.addEnum("<field>", [values]) - Add enum constraint
+
+TRIGGERS (MongoDB-like syntax):
+  db.<collection>.createTrigger("<name>", "<event>", {
+    condition: { field: "<field>", operator: "<op>", value: <value> },
+    action: "<action>",
+    operations: [
+      { type: "set", field: "<field>", value: "<value>" },
+      { type: "inc", field: "<field>", value: <number> },
+      { type: "currentDate", field: "<field>" }
+    ]
+  })
+  
+  Events: BEFORE_INSERT, AFTER_INSERT, BEFORE_UPDATE, AFTER_UPDATE, BEFORE_DELETE, AFTER_DELETE
+  Actions: abort (cancel operation), skip (skip operation), modify (modify document), log (write to log), notify (send notification)
+  Special values: $$NOW (current timestamp), $$USER (current user), $$ROLE (current role)
+  
+  db.<collection>.dropTrigger("<name>") - Drop trigger
+  db.<collection>.listTriggers() - List all triggers on collection
+  db.<collection>.enableTrigger("<name>") - Enable trigger
+  db.<collection>.disableTrigger("<name>") - Disable trigger
+  db.getTriggerLog() - Show trigger execution log
+
+TRIGGER EXAMPLES:
+  // Auto-set updated_at timestamp on every update
+  db.users.createTrigger("update_timestamp", "BEFORE_UPDATE", {
+    action: "modify",
+    operations: [{ type: "set", field: "updated_at", value: "$$NOW" }]
+  })
+  
+  // Prevent deletion of active users
+  db.users.createTrigger("protect_active", "BEFORE_DELETE", {
+    condition: { field: "status", operator: "eq", value: "active" },
+    action: "abort"
+  })
+  
+  // Log all inserts
+  db.orders.createTrigger("audit_log", "AFTER_INSERT", {
+    action: "log",
+    description: "Log all order creations"
+  })
+  
+  // Increment counter on document insert
+  db.stats.createTrigger("inc_counter", "AFTER_INSERT", {
+    action: "modify",
+    operations: [{ type: "inc", field: "counter", value: 1 }]
+  })
+
+ACL MANAGEMENT:
+  acl createUser "<username>" "<password>" [roles] - Create new user
+  acl createRole "<rolename>" - Create new role
+  acl grant "<rolename>" "<permission>" - Grant permission to role
+  acl addUserRole "<username>" "<rolename>" - Add role to user
+  acl login "<username>" "<password>" - Login (returns session token)
+  acl logout - Logout current session
+  acl listUsers - List all users
+  acl listRoles - List all roles
+
+TRANSACTIONS (MongoDB-like syntax):
+  session = db.startSession()  - Start a new session
+  session.startTransaction()   - Begin a transaction
+  session.commitTransaction()  - Commit current transaction
+  session.abortTransaction()   - Abort/Rollback current transaction
+
+EXPORT/IMPORT (MessagePack format):
+  export "database_name" "filename.msgpack"   - Export entire database
+  import "database_name" "filename.msgpack"   - Import database from .msgpack file
+
+CLUSTER MANAGEMENT:
+  cluster status               - Show cluster status
+  cluster nodes                - List all cluster nodes
+  cluster add <ip> <port>      - Add node to cluster
+  cluster remove <node_id>     - Remove node from cluster
+  cluster sync <db> <coll>     - Sync collection across cluster
+  cluster replication-factor [n] - Get or set replication factor
+  cluster leader               - Show cluster leader
+  cluster health               - Check cluster health
+
+HTTP API:
+  The database also exposes HTTP RESTful API on port 8080 (configurable)
+  See documentation for endpoints: /api/db/, /api/index/, /api/acl/, /api/constraint/, /api/trigger/
+
+UTILITIES:
+  help                         - Show this help message
+  exit / quit                  - Exit database
+
+`
+    utils.Println(helpText)
+}