feat: local Bootstrap Vue ECharts dashboards and universal genealogy write scope

family_permissions.py

@@ -0,0 +1,43 @@
+"""Generation-based write boundaries. Viewing and role grants are separate."""
+from collections import deque
+
+LIMIT = 5
+
+
+def generations(people, links, self_id):
+    ids = {p['id'] for p in people}
+    if self_id not in ids:
+        return {}, False
+    graph = {key: [] for key in ids}
+    for edge in links:
+        a, b = edge.get('fromId'), edge.get('toId')
+        if not edge.get('active') or a not in ids or b not in ids:
+            continue
+        delta = 1 if edge.get('kind') == 'parent' else 0
+        if edge.get('kind') not in ('parent', 'spouse'):
+            continue
+        graph[a].append((b, delta))
+        graph[b].append((a, -delta))
+    levels, pending, conflict = {self_id: 0}, deque([self_id]), False
+    while pending:
+        current = pending.popleft()
+        for other, delta in graph[current]:
+            level = levels[current] + delta
+            if other in levels:
+                conflict |= levels[other] != level
+            else:
+                levels[other] = level
+                pending.append(other)
+    return levels, conflict
+
+
+def within(levels, person_id):
+    return person_id in levels and abs(levels[person_id]) <= LIMIT
+
+
+def targets(kind, item):
+    if kind == 'person':
+        return [item['id']]
+    if kind == 'link':
+        return [item['fromId'], item['toId']]
+    return item.get('personIds', [])