handle incoming messages from mesh

src/c3nav/mesh/models.py

@@ -0,0 +1,48 @@
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+from c3nav.mesh.messages import MessageType
+
+
+class ChipID(models.IntegerChoices):
+    ESP32S2 = 2, 'ESP32-S2'
+    ESP32C3 = 5, 'ESP32-C3'
+
+
+class MeshNode(models.Model):
+    address = models.CharField(_('mac address'), max_length=17, unique=True)
+    first_seen = models.DateTimeField(_('first seen'), auto_now_add=True)
+    parent_node = models.ForeignKey('MeshNode', models.PROTECT, null=True,
+                                    related_name='child_nodes', verbose_name=_('parent node'))
+    route = models.ForeignKey('MeshNode', models.PROTECT, null=True,
+                              related_name='routed_nodes', verbose_name=_('route'))
+
+    def __str__(self):
+        return self.address
+
+
+class NodeMessage(models.Model):
+    MESSAGE_TYPES = [(msgtype.value, msgtype.name) for msgtype in MessageType]
+    node = models.ForeignKey('MeshNode', models.PROTECT, null=True,
+                             related_name='received_messages', verbose_name=_('node'))
+    datetime = models.DateTimeField(_('datetime'), db_index=True, auto_now_add=True)
+    message_type = models.SmallIntegerField(_('message type'), db_index=True, choices=MESSAGE_TYPES)
+    data = models.JSONField(_('message data'))
+
+    def __str__(self):
+        return '(#%d) %s at %s' % (self.pk, self.get_message_type_display(), self.datetime)
+
+
+class Firmware(models.Model):
+    chip = models.SmallIntegerField(_('chip'), db_index=True, choices=ChipID.choices)
+    project_name = models.CharField(_('project name'), max_length=32)
+    version = models.CharField(_('firmware version'), max_length=32)
+    idf_version = models.CharField(_('IDF version'), max_length=32)
+    compile_time = models.DateTimeField(_('compile time'))
+    sha256_hash = models.CharField(_('SHA256 hash'), unique=True, max_length=64)
+    binary = models.FileField(_('firmware file'), null=True)
+
+    class Meta:
+        unique_together = [
+            ('chip', 'project_name', 'version', 'idf_version', 'compile_time', 'sha256_hash'),
+        ]