Pouzor
0c7fd3c127
A canvas node carries a full copy of its Device Inventory row, hydrated when the canvas loads. The save routed all of it back, so a save made for nothing but a moved node rewrote the row from a snapshot that could be hours old — silently reverting an edit made meanwhile in the inventory modal, on another canvas, or by the scanner. Diffing the payload against the row server-side cannot fix this: it can't tell "I edited this" from "the row moved on since I loaded it". Only the client holds the baseline. - canvasStore keeps `factsBaseline` — the device facts as received — set on load, refreshed on save, rebased per field by `applyDeviceFacts`. - `serializeNode` sends `changed_facts`: what this canvas actually edited. `link_facts(changed_fields=)` writes nothing outside that list, even where the values differ. Absent (older client, YAML import, MCP) keeps the previous full-write behaviour. - `changed_facts()` additionally drops facts already equal to the row, so a no-op save writes nothing. Identity matching still uses the full payload. - Live fields (status, last_seen…) bypass the filter — the status checker owns reachability, and a save only ever fills a row never checked. An inventory edit also lands on the canvases already on screen: `applyDeviceFacts` pushes the saved row onto every node drawing it, without marking the canvas unsaved. A fact the canvas has edited but not saved is left alone — work in progress wins locally and still saves. ha-relevant: maybe
562 lines
22 KiB
Python
562 lines
22 KiB
Python
"""Keep a canvas :class:`Node` and its Device Inventory row in step.
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The inventory row owns what a device *is* — addresses, services, properties,
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notes, hardware, check method. A node owns only how that device is drawn on one
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canvas. This module holds the matching and merging rules shared by:
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* the one-off backfill that links pre-3.3.0 nodes to inventory rows,
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* the approve / node-create paths, which link instead of copying,
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* the canvas save write-through, which pushes a node edit back to the row.
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Nothing here commits — the caller owns the transaction.
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"""
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from __future__ import annotations
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import json
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import logging
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from collections.abc import Mapping
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from typing import Any
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from sqlalchemy import or_, select, text
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.db.models import InventoryDevice, Node
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from app.services.discovery_sources import add_source
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logger = logging.getLogger(__name__)
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# Canvas furniture: annotations, not hardware. These never get an inventory row.
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FURNITURE_TYPES = frozenset({"group", "groupRect", "text"})
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# Source tag for a device that only ever existed as a canvas node — the backfill
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# mints its inventory row.
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CANVAS_SOURCE = "canvas"
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# Scalar facts the inventory row owns. Order matters only for readability.
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DEVICE_SCALARS = (
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"hostname",
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"ip",
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"mac",
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"os",
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"notes",
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"cpu_count",
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"cpu_model",
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"ram_gb",
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"disk_gb",
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"check_method",
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"check_target",
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)
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def is_furniture(node_type: str | None) -> bool:
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return (node_type or "") in FURNITURE_TYPES
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def _ip_tokens(ip: str | None) -> list[str]:
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"""Split an ``ip`` field into individual addresses.
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A node or device may carry several comma-separated addresses, so identity
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matching compares per token — same rule as ``node_dedupe._ip_tokens``.
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"""
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return [t.strip() for t in ip.split(",") if t.strip()] if ip else []
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def _blank(value: Any) -> bool:
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return value is None or value == ""
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async def find_device_for(
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db: AsyncSession,
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*,
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ip: str | None,
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mac: str | None,
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ieee: str | None,
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) -> InventoryDevice | None:
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"""Find the inventory row describing this host, or ``None``.
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Precedence is ieee > ip > mac, matching ``find_duplicate_node`` and the
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bulk-approve skip order so a device is identified the same way everywhere.
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Hidden rows are eligible: a hidden device is still that device, and silently
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minting a second row for it would resurrect the duplicate the user hid.
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"""
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ip_toks = _ip_tokens(ip)
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conds = []
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if ieee:
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conds.append(InventoryDevice.ieee_address == ieee)
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for tok in ip_toks:
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# Narrow with a substring match, then confirm per token below — an exact
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# comparison misses rows holding several addresses.
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conds.append(InventoryDevice.ip.contains(tok))
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if mac:
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conds.append(InventoryDevice.mac == mac)
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if not conds:
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return None
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candidates = (
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await db.execute(select(InventoryDevice).where(or_(*conds)).order_by(InventoryDevice.discovered_at))
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).scalars().all()
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for device in candidates:
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if ieee and device.ieee_address == ieee:
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return device
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for device in candidates:
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# "1.2.3.4" must not match "1.2.3.40" — confirm the token, don't trust
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# the SQL `contains`.
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if ip_toks and set(_ip_tokens(device.ip)) & set(ip_toks):
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return device
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for device in candidates:
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if mac and device.mac == mac:
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return device
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return None
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def merge_properties(base: list[Any] | None, incoming: list[Any] | None) -> list[Any]:
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"""Union two property lists on ``key`` (case-insensitive); incoming wins.
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Order-stable: existing keys keep their position, new ones are appended, so a
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user's arrangement survives a merge.
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"""
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out: list[Any] = [dict(p) if isinstance(p, dict) else p for p in (base or [])]
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index: dict[str, int] = {}
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for i, prop in enumerate(out):
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if isinstance(prop, dict) and prop.get("key") is not None:
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index[str(prop["key"]).lower()] = i
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for prop in incoming or []:
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if not isinstance(prop, dict) or prop.get("key") is None:
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if prop not in out:
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out.append(prop)
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continue
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key = str(prop["key"]).lower()
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pos = index.get(key)
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if pos is None:
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out.append(dict(prop))
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index[key] = len(out) - 1
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continue
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current = out[pos]
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if not isinstance(current, dict):
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out[pos] = dict(prop)
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continue
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merged = {**current, **{k: v for k, v in prop.items() if not _blank(v)}}
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# Keys match case-insensitively but the display spelling is the user's —
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# "rack" arriving must not rewrite their "Rack".
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merged["key"] = current.get("key", prop["key"])
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# `visible` is a real False, not an empty value — carry it explicitly.
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if "visible" in prop:
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merged["visible"] = prop["visible"]
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out[pos] = merged
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return out
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def _service_key(svc: Any) -> Any:
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if not isinstance(svc, dict):
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return repr(svc)
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return (svc.get("port"), svc.get("protocol"), (svc.get("service_name") or "").lower())
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def merge_services(base: list[Any] | None, incoming: list[Any] | None) -> list[Any]:
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"""Union two service lists on (port, protocol, name); incoming wins."""
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out: list[Any] = [dict(s) if isinstance(s, dict) else s for s in (base or [])]
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index = {_service_key(s): i for i, s in enumerate(out)}
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for svc in incoming or []:
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key = _service_key(svc)
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pos = index.get(key)
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if pos is None:
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out.append(dict(svc) if isinstance(svc, dict) else svc)
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index[key] = len(out) - 1
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elif isinstance(svc, dict) and isinstance(out[pos], dict):
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out[pos] = {**out[pos], **svc}
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else:
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out[pos] = svc
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return out
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# Observations rather than edits: the checker and the scanner write these, so a
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# client never lists them as changed and they survive a `changed_fields` filter.
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_LIVE_FACT_FIELDS = frozenset({"status", "last_seen", "last_scan", "response_time_ms"})
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def changed_facts(device: InventoryDevice, facts: Mapping[str, Any]) -> dict[str, Any]:
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"""The subset of ``facts`` that actually differs from the row.
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A canvas save sends a *full* copy of the device — the facts were hydrated
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into the node when the canvas loaded — so a save triggered by nothing but a
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node being dragged would otherwise rewrite the row from a snapshot that may
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be minutes or hours old, silently reverting an edit made meanwhile in the
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inventory modal, on another canvas, or by the scanner. Narrowing to what the
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sender changed turns the write-through from "push my whole snapshot" into
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"push my edit", so two writers only collide on the same field.
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The comparison mirrors :func:`merge_facts_into_device`: a blank incoming
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value is not a change (it never clears an established one), and a list
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counts as changed only when it would actually be replaced by a different
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one. Ambiguity is resolved toward reporting a change — a false positive is
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the old behaviour for that field, a false negative would drop a real edit.
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"""
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out: dict[str, Any] = {}
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for field in (*DEVICE_SCALARS, "label", "type"):
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incoming = facts.get(field)
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if _blank(incoming) or incoming == getattr(device, field, None):
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continue
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out[field] = incoming
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if not _blank(facts.get("ieee_address")) and _blank(device.ieee_address):
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out["ieee_address"] = facts["ieee_address"]
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if facts.get("show_hardware") and not device.show_hardware:
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out["show_hardware"] = facts["show_hardware"]
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if "properties" in facts and list(facts["properties"] or []) != list(device.properties or []):
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out["properties"] = facts["properties"]
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if "services" in facts and list(facts["services"] or []) != list(device.services or []):
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out["services"] = facts["services"]
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# Live observations, not edits: carried through only where the merge would
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# have used them — filling a row that has never been checked.
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if facts.get("status") and device.status_live in (None, "", "unknown"):
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out["status"] = facts["status"]
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for field in ("last_seen", "last_scan", "response_time_ms"):
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if facts.get(field) is not None:
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out[field] = facts[field]
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return out
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def merge_facts_into_device(
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device: InventoryDevice,
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facts: Mapping[str, Any],
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*,
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overwrite_scalars: bool,
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replace_lists: bool,
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) -> None:
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"""Fold one view of a device into its inventory row, in place.
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``facts`` is a plain mapping — what a canvas save sent, or what a legacy
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node's columns held — so this rule lives in one place regardless of where
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the view came from.
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Two independent knobs, because the callers need three combinations:
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* ``overwrite_scalars`` — a non-blank incoming value replaces the row's.
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True for the backfill (nodes are visited oldest-edit-first, so the most
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recently edited canvas is the last writer and wins) and for a user's save.
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False on approve, where the row was just discovered and the node is only a
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placement. A blank *never* clears an established value in either mode.
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* ``replace_lists`` — properties/services are taken wholesale rather than
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unioned. True only for a user's save: otherwise a property they deleted
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would come straight back on the next one. The backfill unions, so nothing
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any canvas recorded is lost. It applies list by list: a list absent from
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``facts`` is left alone even in replace mode, so a partial update never
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clears the one it did not send.
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"""
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for field in (*DEVICE_SCALARS, "label", "type"):
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incoming = facts.get(field)
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if _blank(incoming):
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continue
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if overwrite_scalars or _blank(getattr(device, field, None)):
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setattr(device, field, incoming)
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if not _blank(facts.get("ieee_address")) and _blank(device.ieee_address):
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# Identity, never overwritten — two IEEEs mean two devices.
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device.ieee_address = facts["ieee_address"]
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if facts.get("show_hardware") and not device.show_hardware:
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device.show_hardware = True
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# Per list, and only for one the caller actually sent: a partial update
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# carrying properties alone must leave services as they were, not blank them.
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if replace_lists and "properties" in facts:
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device.properties = list(facts["properties"] or [])
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else:
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device.properties = merge_properties(device.properties, facts.get("properties"))
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if replace_lists and "services" in facts:
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device.services = list(facts["services"] or [])
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else:
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device.services = merge_services(device.services, facts.get("services"))
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# Live status: keep the freshest observation rather than the last writer.
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last_seen, status, last_scan = facts.get("last_seen"), facts.get("status"), facts.get("last_scan")
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if last_seen and (device.last_seen is None or last_seen > device.last_seen):
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device.last_seen = last_seen
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device.status_live = status or device.status_live
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device.response_time_ms = facts.get("response_time_ms")
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elif device.status_live in (None, "", "unknown") and status:
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device.status_live = status
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if last_scan and (device.last_scan is None or last_scan > device.last_scan):
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device.last_scan = last_scan
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def device_from_facts(facts: Mapping[str, Any]) -> InventoryDevice:
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"""Mint the inventory row for a device that has none.
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Tagged ``canvas`` so the inventory filters can tell hand-drawn gear apart
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from anything a scan or import found.
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"""
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return InventoryDevice(
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label=facts.get("label"),
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type=facts.get("type"),
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hostname=facts.get("hostname"),
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ip=facts.get("ip"),
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mac=facts.get("mac"),
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os=facts.get("os"),
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ieee_address=facts.get("ieee_address"),
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services=list(facts.get("services") or []),
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properties=list(facts.get("properties") or []),
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notes=facts.get("notes"),
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cpu_count=facts.get("cpu_count"),
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cpu_model=facts.get("cpu_model"),
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ram_gb=facts.get("ram_gb"),
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disk_gb=facts.get("disk_gb"),
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show_hardware=bool(facts.get("show_hardware")),
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check_method=facts.get("check_method"),
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check_target=facts.get("check_target"),
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suggested_type=facts.get("type"),
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friendly_name=facts.get("label"),
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# On a canvas already, so it is past the pending queue.
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status="approved",
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status_live=facts.get("status") or "unknown",
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last_seen=facts.get("last_seen"),
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last_scan=facts.get("last_scan"),
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response_time_ms=facts.get("response_time_ms"),
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discovery_source=CANVAS_SOURCE,
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discovery_sources=[CANVAS_SOURCE],
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)
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async def link_facts(
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db: AsyncSession,
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node: Node,
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facts: Mapping[str, Any],
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*,
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overwrite_scalars: bool = False,
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replace_lists: bool = False,
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only_changed: bool = False,
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changed_fields: list[str] | None = None,
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) -> InventoryDevice | None:
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"""Point one node at its inventory row, creating or merging as needed.
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``facts`` is this node's view of the device — the fields a canvas save sent,
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or a legacy node's columns during the backfill. Returns the row, or ``None``
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for canvas furniture. Flushes so a freshly minted row has an id to link to,
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but does not commit.
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Two narrowings turn a save from "push my whole snapshot" into "push my edit",
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and they compose. Identity matching always uses the full ``facts`` — the row
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has to be found before it can be narrowed against.
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* ``changed_fields`` — what the sender says it edited since it loaded the
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device. Authoritative: a fact absent from the list is not written even when
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it differs, because the difference means the *row* moved on, not the sender.
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* ``only_changed`` — drop facts already equal to the row (see
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:func:`changed_facts`), so a no-op save writes nothing at all.
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"""
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if is_furniture(node.type):
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node.device_id = None
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return None
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device = None
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if node.device_id:
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device = await db.get(InventoryDevice, node.device_id)
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if device is None:
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device = await find_device_for(
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db, ip=facts.get("ip"), mac=facts.get("mac"), ieee=facts.get("ieee_address")
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)
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if device is None:
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device = device_from_facts(facts)
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db.add(device)
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await db.flush()
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else:
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merged = dict(facts)
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if changed_fields is not None:
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keep = set(changed_fields) | _LIVE_FACT_FIELDS
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merged = {k: v for k, v in merged.items() if k in keep}
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if only_changed:
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merged = changed_facts(device, merged)
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merge_facts_into_device(
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device,
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merged,
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overwrite_scalars=overwrite_scalars,
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replace_lists=replace_lists,
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)
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device.discovery_sources = add_source(device.discovery_sources, CANVAS_SOURCE)
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node.device_id = device.id
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return device
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def node_columns(payload: Mapping[str, Any]) -> dict[str, Any]:
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"""The subset of a node payload that is still a `nodes` column.
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The wire shape carries the device facts flat on the node; they belong to the
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inventory row now, so they are dropped here and applied through
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:func:`link_facts` instead.
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"""
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allowed = {c.name for c in Node.__table__.columns}
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return {k: v for k, v in payload.items() if k in allowed}
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# Fields that are both a node column and a device fact: the node keeps a copy so
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# a half-migrated database still renders, but the row is the truth.
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_SHARED_FIELDS = ("label", "type")
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# Everything the inventory row owns, as it appears in a node payload.
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DEVICE_FACT_FIELDS = (
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*DEVICE_SCALARS, "services", "properties", "show_hardware", "status", *_SHARED_FIELDS,
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)
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def facts_from_update(sent: Mapping[str, Any]) -> dict[str, Any]:
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"""The device facts inside a partial node update — only what was sent.
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An omitted field must not clear the row, so unsent keys are simply absent.
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"""
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return {k: v for k, v in sent.items() if k in DEVICE_FACT_FIELDS}
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def facts_from_payload(payload: Mapping[str, Any], *, label: str, node_type: str) -> dict[str, Any]:
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"""The device facts inside a node save/create payload.
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The wire shape still carries them flat on the node, so this is where they
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are separated from the presentation fields the node itself keeps.
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"""
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facts: dict[str, Any] = {
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field: payload.get(field)
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for field in (*DEVICE_SCALARS, "services", "properties", "show_hardware", "status")
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}
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facts["label"] = label
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facts["type"] = node_type
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return facts
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async def load_devices_for(db: AsyncSession, nodes: list[Node]) -> dict[str, InventoryDevice]:
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"""Fetch the inventory rows a batch of nodes points at, keyed by device id."""
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ids = {n.device_id for n in nodes if n.device_id}
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if not ids:
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return {}
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rows = (
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await db.execute(select(InventoryDevice).where(InventoryDevice.id.in_(ids)))
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).scalars().all()
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return {d.id: d for d in rows}
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def hydrated_node(node: Node, device: InventoryDevice | None) -> dict[str, Any]:
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"""A node as the API reports it: presentation from the node, facts from the row.
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The device fields stay on the wire exactly where they have always been, so
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every reader — the canvas, the live view, the MCP server — is unaffected by
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the split. Canvas furniture has no row and simply reports the defaults.
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"""
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payload: dict[str, Any] = {
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|
c.name: getattr(node, c.name) for c in node.__table__.columns
|
|
}
|
|
if device is None:
|
|
return payload
|
|
|
|
for field in DEVICE_SCALARS:
|
|
payload[field] = getattr(device, field, None)
|
|
payload["label"] = device.label or node.label
|
|
payload["type"] = device.type or node.type
|
|
payload["services"] = device.services or []
|
|
payload["properties"] = device.properties or []
|
|
payload["show_hardware"] = bool(device.show_hardware)
|
|
payload["ieee_address"] = device.ieee_address
|
|
payload["status"] = device.status_live or "unknown"
|
|
payload["last_seen"] = device.last_seen
|
|
payload["last_scan"] = device.last_scan
|
|
payload["response_time_ms"] = device.response_time_ms
|
|
return payload
|
|
|
|
|
|
# The device columns `nodes` carried before 3.3.0. They are read once, by the
|
|
# backfill, and then dropped — so they are named here as raw SQL rather than as
|
|
# model attributes that no longer exist.
|
|
_LEGACY_NODE_COLUMNS = (
|
|
"hostname", "ip", "mac", "os", "status", "check_method", "check_target",
|
|
"services", "notes", "cpu_count", "cpu_model", "ram_gb", "disk_gb",
|
|
"show_hardware", "properties", "ieee_address", "last_seen", "last_scan",
|
|
"response_time_ms",
|
|
)
|
|
|
|
|
|
async def _legacy_columns_present(db: AsyncSession) -> list[str]:
|
|
"""Which pre-3.3.0 device columns still exist on `nodes`."""
|
|
rows = (await db.execute(text("PRAGMA table_info(nodes)"))).all()
|
|
present = {r[1] for r in rows}
|
|
return [c for c in _LEGACY_NODE_COLUMNS if c in present]
|
|
|
|
|
|
def _decode_json(value: Any) -> Any:
|
|
"""Raw SQL hands back JSON columns as text; the ORM would have decoded them."""
|
|
if isinstance(value, str):
|
|
try:
|
|
return json.loads(value)
|
|
except json.JSONDecodeError:
|
|
return []
|
|
return value
|
|
|
|
|
|
async def backfill_node_devices(db: AsyncSession) -> dict[str, int]:
|
|
"""Link every pre-3.3.0 canvas node to a Device Inventory row.
|
|
|
|
Non-destructive: it writes ``nodes.device_id`` and fills the inventory row,
|
|
and never deletes a node or a row. Two nodes on two canvases describing the
|
|
same host converge on one row — that convergence is the point.
|
|
|
|
Nodes are processed oldest-edit-first so that, where two canvases disagree
|
|
on a scalar, the most recently edited node is the last writer and wins;
|
|
properties and services are unioned, so nothing any canvas recorded is lost.
|
|
|
|
Reads the legacy columns with raw SQL because the model no longer declares
|
|
them — this runs on the boot that drops them, once. Returns counts for the
|
|
boot log. Does not commit.
|
|
"""
|
|
legacy = await _legacy_columns_present(db)
|
|
if not legacy:
|
|
# Already migrated: the columns are gone, so nothing can be left to read.
|
|
return {"linked": 0, "created": 0, "merged": 0}
|
|
|
|
placeholders = ", ".join(legacy)
|
|
furniture = ", ".join(f"'{t}'" for t in sorted(FURNITURE_TYPES))
|
|
rows = (
|
|
await db.execute(
|
|
text(
|
|
f"SELECT id, label, type, design_id, {placeholders} FROM nodes "
|
|
f"WHERE device_id IS NULL AND type NOT IN ({furniture}) "
|
|
"ORDER BY updated_at, created_at, id"
|
|
)
|
|
)
|
|
).mappings().all()
|
|
if not rows:
|
|
return {"linked": 0, "created": 0, "merged": 0}
|
|
|
|
created = merged = 0
|
|
for row in rows:
|
|
facts: dict[str, Any] = {c: row[c] for c in legacy}
|
|
facts["services"] = _decode_json(facts.get("services")) or []
|
|
facts["properties"] = _decode_json(facts.get("properties")) or []
|
|
facts["label"] = row["label"]
|
|
facts["type"] = row["type"]
|
|
|
|
existing = await find_device_for(
|
|
db, ip=facts.get("ip"), mac=facts.get("mac"), ieee=facts.get("ieee_address")
|
|
)
|
|
node = await db.get(Node, row["id"])
|
|
if node is None: # pragma: no cover - the row was just read
|
|
continue
|
|
device = await link_facts(db, node, facts, overwrite_scalars=True)
|
|
if device is None:
|
|
continue
|
|
if existing is None:
|
|
created += 1
|
|
logger.info(
|
|
"Inventory backfill: node %s (%s) created device %s", node.id, row["label"], device.id
|
|
)
|
|
else:
|
|
merged += 1
|
|
logger.info(
|
|
"Inventory backfill: node %s (%s, design %s) merged into device %s",
|
|
node.id, row["label"], row["design_id"], device.id,
|
|
)
|
|
|
|
await db.flush()
|
|
return {"linked": len(rows), "created": created, "merged": merged}
|