From 9ad319d03a3083afd3c53afd6034dff5ccd702f5 Mon Sep 17 00:00:00 2001
From: Timofey <timofey.syr17@gmail.com>
Date: Mon, 18 Aug 2025 10:33:25 +0300
Subject: [PATCH] feat / AEB-21 create db schema

---
 backend/sitemanagement/models.py | 82 +++++++++++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 1 deletion(-)

diff --git a/backend/sitemanagement/models.py b/backend/sitemanagement/models.py
index 71a8362..5bc7952 100644
--- a/backend/sitemanagement/models.py
+++ b/backend/sitemanagement/models.py
@@ -1,3 +1,83 @@
 from django.db import models
+from decimal import Decimal
 
-# Create your models here.
+
+class Multiplexor(models.Model):
+    """Устройство-мультиплексор"""
+    name = models.CharField(max_length=50, unique=True)  
+    ip = models.GenericIPAddressField(null=True, blank=True)
+    subnet = models.GenericIPAddressField(null=True, blank=True)
+    gateway = models.GenericIPAddressField(null=True, blank=True)
+    sd_path = models.CharField(max_length=255, null=True, blank=True)
+
+    def __str__(self):
+        return self.name
+
+
+class Channel(models.Model):
+    """Физический канал мультиплексора"""
+    multiplexor = models.ForeignKey(Multiplexor, on_delete=models.CASCADE, related_name="channels")
+    number = models.PositiveSmallIntegerField()  # CH-1 ... CH-14
+    # для "полканалов" можно использовать дробное значение (1, 1.5, 2, ...)
+    position = models.DecimalField(max_digits=4, decimal_places=1, default=Decimal("1.0")) 
+
+    class Meta:
+        unique_together = ("multiplexor", "number", "position")
+
+    def __str__(self):
+        return f"{self.multiplexor.name} - CH{self.number} ({self.position})"
+    
+
+class SensorType(models.Model):
+    """Тип датчика: GA, PE, GLE"""
+    code = models.CharField(max_length=10, unique=True)  # GA, PE, GLE
+    name = models.CharField(max_length=100)
+    description = models.TextField(blank=True, null=True)
+
+    def __str__(self):
+        return self.code
+
+
+class SignalFormat(models.Model):
+    """Формат сигнала и правило преобразования"""
+    sensor_type = models.ForeignKey(SensorType, on_delete=models.CASCADE, related_name="formats")
+    code = models.CharField(max_length=50)  # например "4-20мА", "VW f<1600Hz", "NTC R>250Ohm"
+    unit = models.CharField(max_length=20, blank=True, null=True)  # °C, мкм/м, мм и т.п.
+    conversion_rule = models.CharField(max_length=255, blank=True, null=True)
+    # можно хранить Python-путь к функции конвертации, например "sensors.convert.ga_current_to_angle"
+
+    class Meta:
+        unique_together = ("sensor_type", "code")
+
+    def __str__(self):
+        return f"{self.sensor_type.code} - {self.code}"
+
+
+class Sensor(models.Model):
+    """Конкретный датчик, установленный в канале"""
+    channel = models.ForeignKey(Channel, on_delete=models.CASCADE, related_name="sensors")
+    sensor_type = models.ForeignKey(SensorType, on_delete=models.CASCADE)
+    signal_format = models.ForeignKey(SignalFormat, on_delete=models.SET_NULL, null=True, blank=True)
+    serial_number = models.CharField(max_length=50, blank=True, null=True)  # CL 2106009
+    name = models.CharField(max_length=50, blank=True, null=True)  # GA-1, HLE-1 и т.п.
+
+    def __str__(self):
+        return f"{self.name or self.sensor_type.code} ({self.serial_number})"
+
+
+class Metric(models.Model):
+    """Значения, которые приходят из CSV"""
+    timestamp = models.DateTimeField()
+    sensor = models.ForeignKey(Sensor, on_delete=models.CASCADE, related_name="metrics")
+    raw_value = models.CharField(max_length=50)  # исходное значение из файла (например "11.964 (A)")
+    value = models.FloatField(null=True, blank=True)  # преобразованное значение
+    status = models.CharField(max_length=20, blank=True, null=True)  # No Rx, Error, NotAv и т.д.
+
+    class Meta:
+        indexes = [
+            models.Index(fields=["timestamp"]),
+            models.Index(fields=["sensor"]),
+        ]
+
+    def __str__(self):
+        return f"{self.timestamp} {self.sensor} = {self.value} {self.sensor.signal_format.unit if self.sensor.signal_format else ''}"
\ No newline at end of file