Initial commit — wiring diagram maker with full feature set

- FastAPI + SQLite backend with routers for diagrams, devices, wires, bundles, connectors, export, and Octopart/Nexar search - Konva.js canvas: ortho/direct/curved routing, wire crossings, harness mode, snap-to-grid, multi-select, drag, resize, undo - Wire features: color/stripe, twisted pair helix, shielded glow, gauge size label, multi-core bundle grouping, length/unit tracking - Device library: connector, terminal block, cable, splice, label, group, relay, fuse, switch, component with custom connector support - Exports: BOM CSV, assembly TXT, JSON, formboard layout, PNG image - Auto-migration for schema changes via ALTER TABLE at startup Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-24 12:51:21 -04:00
commit f32203b630
26 changed files with 5667 additions and 0 deletions
@@ -0,0 +1,109 @@
+import os
+import time
+from typing import Tuple
+
+import httpx
+from fastapi import APIRouter, HTTPException, Query
+
+router = APIRouter(tags=["octopart"])
+
+NEXAR_TOKEN_URL = "https://identity.nexar.com/connect/token"
+NEXAR_API_URL   = "https://api.nexar.com/graphql"
+
+_token_cache: dict = {"token": None, "expires_at": 0.0}
+
+_SEARCH_GQL = """
+query PartSearch($q: String!, $limit: Int!) {
+  supSearchMpn(q: $q, limit: $limit) {
+    results {
+      part {
+        mpn
+        manufacturer { name }
+        shortDescription
+        bestDatasheet { url }
+      }
+    }
+  }
+}
+"""
+
+
+def _credentials() -> Tuple[str, str]:
+    return (
+        os.getenv("NEXAR_CLIENT_ID", ""),
+        os.getenv("NEXAR_CLIENT_SECRET", ""),
+    )
+
+
+async def _get_token() -> str:
+    client_id, client_secret = _credentials()
+    if not client_id or not client_secret:
+        raise HTTPException(
+            status_code=503,
+            detail="Nexar/Octopart credentials not configured — set NEXAR_CLIENT_ID and NEXAR_CLIENT_SECRET environment variables",
+        )
+
+    now = time.time()
+    if _token_cache["token"] and now < _token_cache["expires_at"] - 60:
+        return _token_cache["token"]  # type: ignore[return-value]
+
+    async with httpx.AsyncClient() as client:
+        resp = await client.post(
+            NEXAR_TOKEN_URL,
+            data={
+                "grant_type": "client_credentials",
+                "client_id": client_id,
+                "client_secret": client_secret,
+            },
+            timeout=10,
+        )
+    if resp.status_code != 200:
+        raise HTTPException(status_code=502, detail=f"Nexar auth failed: {resp.text[:200]}")
+
+    body = resp.json()
+    _token_cache["token"] = body["access_token"]
+    _token_cache["expires_at"] = now + body.get("expires_in", 3600)
+    return _token_cache["token"]  # type: ignore[return-value]
+
+
+@router.get("/status")
+async def octopart_status():
+    client_id, client_secret = _credentials()
+    return {"configured": bool(client_id and client_secret)}
+
+
+@router.get("/search")
+async def octopart_search(
+    q: str = Query(..., min_length=1),
+    limit: int = Query(8, ge=1, le=20),
+):
+    token = await _get_token()
+
+    async with httpx.AsyncClient() as client:
+        resp = await client.post(
+            NEXAR_API_URL,
+            headers={"Authorization": f"Bearer {token}", "Content-Type": "application/json"},
+            json={"query": _SEARCH_GQL, "variables": {"q": q, "limit": limit}},
+            timeout=12,
+        )
+
+    if resp.status_code != 200:
+        raise HTTPException(status_code=502, detail=f"Nexar API error {resp.status_code}")
+
+    body = resp.json()
+    if "errors" in body:
+        raise HTTPException(status_code=502, detail=str(body["errors"])[:300])
+
+    results = body.get("data", {}).get("supSearchMpn", {}).get("results", [])
+    out = []
+    for r in results:
+        part = r.get("part")
+        if not part:
+            continue
+        out.append({
+            "mpn":          part.get("mpn", ""),
+            "manufacturer": (part.get("manufacturer") or {}).get("name", ""),
+            "description":  part.get("shortDescription") or "",
+            "datasheet_url": (part.get("bestDatasheet") or {}).get("url"),
+        })
+    return out