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1import { Hono } from "hono";
2import { cors } from "hono/cors";
3import { createWorker } from "@atmo-dev/contrail/worker";
4import { Contrail } from "@atmo-dev/contrail";
5import { config } from "./contrail.config.js";
6import { lexicons } from "../lexicons/generated/index.js";
7import { LANDING_PAGE } from "./landing-page.js";
8import { StrataContainer } from "./container.js";
9
10// ─── Env ────────────────────────────────────────────────────────────
11
12interface Env {
13 DB: D1Database;
14 VAULT_BUCKET: R2Bucket;
15 CARRY_BUCKET: R2Bucket;
16 STRATA_CONTAINER: DurableObjectNamespace;
17}
18
19// ─── Contrail setup ─────────────────────────────────────────────────
20
21const contrailWorker = createWorker(config, { lexicons });
22const contrail = new Contrail(config);
23let contrailReady = false;
24
25async function ensureContrailReady(db: D1Database): Promise<void> {
26 if (contrailReady) return;
27 await contrail.init(db);
28 contrailReady = true;
29}
30
31// ─── Island detection (connected components) ────────────────────────
32//
33// Load all connections, build an undirected graph, find connected
34// components via BFS. Each component is an "island" — a cluster of
35// linked URLs that form a constellation in the knowledge graph.
36
37interface Island {
38 id: string;
39 vertices: string[];
40 edges: Array<{
41 uri: string;
42 did: string;
43 source: string;
44 target: string;
45 connectionType: string;
46 note: string;
47 handle?: string | null;
48 }>;
49}
50
51async function detectIslands(db: D1Database): Promise<Island[]> {
52 await ensureContrailReady(db);
53
54 // Load all connections
55 const rows = await db
56 .prepare(
57 `SELECT r.record, r.did, r.rkey, i.handle
58 FROM records_connection r
59 LEFT JOIN identities i ON r.did = i.did
60 ORDER BY r.time_us DESC`,
61 )
62 .all<{ record: string; did: string; rkey: string; handle: string | null }>();
63
64 // Build adjacency list
65 const adj = new Map<string, Set<string>>();
66 const edges: Island["edges"] = [];
67
68 for (const row of rows.results || []) {
69 try {
70 const value = JSON.parse(row.record);
71 const source = value.source as string;
72 const target = value.target as string;
73 if (!source || !target) continue;
74
75 if (!adj.has(source)) adj.set(source, new Set());
76 if (!adj.has(target)) adj.set(target, new Set());
77 adj.get(source)!.add(target);
78 adj.get(target)!.add(source);
79
80 edges.push({
81 uri: `at://${row.did}/network.cosmik.connection/${row.rkey}`,
82 did: row.did,
83 source,
84 target,
85 connectionType: value.connectionType || "relates",
86 note: value.note || "",
87 handle: row.handle,
88 });
89 } catch {}
90 }
91
92 // BFS to find connected components
93 const visited = new Set<string>();
94 const islands: Island[] = [];
95
96 for (const node of adj.keys()) {
97 if (visited.has(node)) continue;
98
99 const component: string[] = [];
100 const queue = [node];
101 while (queue.length > 0) {
102 const current = queue.shift()!;
103 if (visited.has(current)) continue;
104 visited.add(current);
105 component.push(current);
106
107 for (const neighbor of adj.get(current) || []) {
108 if (!visited.has(neighbor)) queue.push(neighbor);
109 }
110 }
111
112 // Only include edges where both endpoints are in this component
113 const componentSet = new Set(component);
114 const componentEdges = edges.filter(
115 e => componentSet.has(e.source) && componentSet.has(e.target),
116 );
117
118 // Stable ID: truncated SHA-256 of the lexicographic minimum vertex
119 const lexmin = component.sort()[0];
120 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(lexmin));
121 const id = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
122
123 islands.push({
124 id,
125 vertices: component,
126 edges: componentEdges,
127 });
128 }
129
130 // Sort by size descending
131 islands.sort((a, b) => b.vertices.length - a.vertices.length);
132 return islands;
133}
134
135// ─── Resolve vertex metadata (batched) ──────────────────────────────
136//
137// Bulk queries instead of N+1 per vertex. Loads all cards and citations
138// matching the given URIs in a few chunked queries.
139
140async function resolveVertexMeta(
141 db: D1Database,
142 uris: string[],
143): Promise<Map<string, { title: string; description: string; type: string }>> {
144 const meta = new Map<string, { title: string; description: string; type: string }>();
145 for (const uri of uris) {
146 meta.set(uri, { title: uri, description: "", type: "unknown" });
147 }
148
149 const httpUris = uris.filter(u => u.startsWith("http"));
150 const atUris = uris.filter(u => u.startsWith("at://"));
151 const CHUNK = 50;
152
153 // ── Resolve HTTP URIs (existing logic) ──
154
155 // Batch card lookup
156 for (let i = 0; i < httpUris.length; i += CHUNK) {
157 const chunk = httpUris.slice(i, i + CHUNK);
158 const placeholders = chunk.map(() => "?").join(",");
159 const rows = await db
160 .prepare(
161 `SELECT record FROM records_card
162 WHERE json_extract(record, '$.content.url') IN (${placeholders})`,
163 )
164 .bind(...chunk)
165 .all<{ record: string }>();
166
167 for (const row of rows.results || []) {
168 try {
169 const card = JSON.parse(row.record);
170 const url = card?.content?.url;
171 if (!url || !meta.has(url)) continue;
172 const m = card.content.metadata;
173 if (m?.title || m?.description) {
174 meta.set(url, {
175 title: m.title || url,
176 description: m.description || "",
177 type: card.type === "URL" ? "url" : "note",
178 });
179 }
180 } catch {}
181 }
182 }
183
184 // Batch citation lookup (overrides card data if found)
185 for (let i = 0; i < httpUris.length; i += CHUNK) {
186 const chunk = httpUris.slice(i, i + CHUNK);
187 const placeholders = chunk.map(() => "?").join(",");
188 const rows = await db
189 .prepare(
190 `SELECT record FROM records_citation
191 WHERE json_extract(record, '$.url') IN (${placeholders})`,
192 )
193 .bind(...chunk)
194 .all<{ record: string }>();
195
196 for (const row of rows.results || []) {
197 try {
198 const citation = JSON.parse(row.record);
199 const url = citation.url;
200 if (!url || !meta.has(url)) continue;
201 if (citation.title) {
202 const existing = meta.get(url)!;
203 meta.set(url, {
204 title: citation.title,
205 description: citation.takeaway || existing.description,
206 type: "citation",
207 });
208 }
209 } catch {}
210 }
211 }
212
213 // ── Resolve AT URIs ──
214
215 // Batch card lookup by AT URI
216 for (let i = 0; i < atUris.length; i += CHUNK) {
217 const chunk = atUris.slice(i, i + CHUNK);
218 const placeholders = chunk.map(() => "?").join(",");
219 const rows = await db
220 .prepare(`SELECT uri, record FROM records_card WHERE uri IN (${placeholders})`)
221 .bind(...chunk)
222 .all<{ uri: string; record: string }>();
223
224 for (const row of rows.results || []) {
225 try {
226 const card = JSON.parse(row.record);
227 const m = card?.content?.metadata;
228 const url = card?.content?.url;
229 if (meta.has(row.uri)) {
230 meta.set(row.uri, {
231 title: m?.title || url || row.uri,
232 description: m?.description || "",
233 type: "card",
234 });
235 }
236 } catch {}
237 }
238 }
239
240 // Batch collection lookup by AT URI
241 for (let i = 0; i < atUris.length; i += CHUNK) {
242 const chunk = atUris.slice(i, i + CHUNK);
243 const placeholders = chunk.map(() => "?").join(",");
244 const rows = await db
245 .prepare(`SELECT uri, record FROM records_collection WHERE uri IN (${placeholders})`)
246 .bind(...chunk)
247 .all<{ uri: string; record: string }>();
248
249 for (const row of rows.results || []) {
250 try {
251 const coll = JSON.parse(row.record);
252 if (meta.has(row.uri)) {
253 meta.set(row.uri, {
254 title: coll.name || row.uri,
255 description: coll.description || "",
256 type: "collection",
257 });
258 }
259 } catch {}
260 }
261 }
262
263 return meta;
264}
265
266// ─── Derive island from lexmin ────────────────────────────────────
267//
268// Given a lexmin vertex (canonical component reference), derive the
269// connected component by traversing network.cosmik.connection records.
270
271async function deriveIsland(
272 db: D1Database,
273 seed: string,
274): Promise<Island | null> {
275 await ensureContrailReady(db);
276
277 // BFS in application code — recursive CTE OOMs in D1 due to cross join
278 const visited = new Set<string>();
279 const queue = [seed];
280 const allEdges: Array<{
281 uri: string; did: string; rkey: string;
282 source: string; target: string; connectionType: string;
283 note: string; handle: string | null;
284 }> = [];
285
286 while (queue.length > 0) {
287 // Drain the current queue into a batch
288 const batch = queue.splice(0, 50);
289 const toQuery = batch.filter(v => !visited.has(v));
290 if (toQuery.length === 0) continue;
291
292 // Mark visited
293 for (const v of toQuery) visited.add(v);
294
295 // Query connections where any of these vertices are source or target
296 const placeholders = toQuery.map(() => "?").join(",");
297 const rows = await db
298 .prepare(
299 `SELECT r.record, r.did, r.rkey, i.handle
300 FROM records_connection r
301 LEFT JOIN identities i ON r.did = i.did
302 WHERE json_extract(r.record, '$.source') IN (${placeholders})
303 OR json_extract(r.record, '$.target') IN (${placeholders})`,
304 )
305 .bind(...toQuery, ...toQuery)
306 .all<{ record: string; did: string; rkey: string; handle: string | null }>();
307
308 for (const row of rows.results || []) {
309 try {
310 const value = JSON.parse(row.record);
311 const source = value.source as string;
312 const target = value.target as string;
313 if (!source || !target) continue;
314
315 // Collect edge
316 const edgeKey = `${source}|${target}|${row.rkey}`;
317 allEdges.push({
318 uri: `at://${row.did}/network.cosmik.connection/${row.rkey}`,
319 did: row.did,
320 rkey: row.rkey,
321 source,
322 target,
323 connectionType: value.connectionType || "relates",
324 note: value.note || "",
325 handle: row.handle,
326 });
327
328 // Enqueue unvisited neighbors
329 if (!visited.has(source)) queue.push(source);
330 if (!visited.has(target)) queue.push(target);
331 } catch {}
332 }
333 }
334
335 if (visited.size === 0) return null;
336
337 const vertices = [...visited];
338
339 // Filter edges to only those with both endpoints in the component
340 const vertexSet = new Set(vertices);
341 const edges: Island["edges"] = [];
342 const seenEdges = new Set<string>();
343 for (const e of allEdges) {
344 if (!vertexSet.has(e.source) || !vertexSet.has(e.target)) continue;
345 const edgeKey = `${e.source}|${e.target}|${e.rkey}`;
346 if (seenEdges.has(edgeKey)) continue;
347 seenEdges.add(edgeKey);
348 edges.push({
349 uri: e.uri,
350 did: e.did,
351 source: e.source,
352 target: e.target,
353 connectionType: e.connectionType,
354 note: e.note,
355 handle: e.handle,
356 });
357 }
358
359 // Compute stable ID from lexmin
360 const sortedVertices = [...vertices].sort();
361 const actualLexmin = sortedVertices[0];
362 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(actualLexmin));
363 const id = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
364
365 return { id, vertices, edges };
366}
367
368// ─── List strata islands from records_strata ──────────────────────
369
370// ─── Hono app ───────────────────────────────────────────────────────
371
372let app: Hono<{ Bindings: Env }> | null = null;
373
374function buildApp(env: Env): Hono<{ Bindings: Env }> {
375 const app = new Hono<{ Bindings: Env }>();
376 const db = env.DB;
377
378 app.use("*", cors());
379
380 // Landing page — strata records feed
381 app.get("/", async (c) => {
382 let islandsJson = "[]";
383 try {
384 await ensureContrailReady(db);
385 const rows = await db
386 .prepare("SELECT uri, record FROM records_strata ORDER BY time_us DESC LIMIT 50")
387 .all<{ uri: string; record: string }>();
388
389 const islands: any[] = [];
390 for (const row of rows.results || []) {
391 try {
392 const rec = JSON.parse(row.record);
393 const lexmin = rec.source?.uri;
394 if (!lexmin) continue;
395 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(lexmin));
396 const id = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
397 islands.push({
398 id,
399 lexmin,
400 title: rec.analysis?.title || null,
401 recordUri: row.uri,
402 });
403 } catch {}
404 }
405 islandsJson = JSON.stringify(islands);
406 } catch (e) {
407 console.error("Failed to load islands:", e);
408 }
409
410 const page = LANDING_PAGE.replace(
411 "</head>",
412 `<script>window.__ISLANDS__=${islandsJson};</script></head>`,
413 );
414 return c.html(page);
415 });
416
417 // ── Islands API ──────────────────────────────────────────────────
418
419 app.get("/xrpc/org.latha.strata.getIslands", async (c) => {
420 const limit = Math.min(parseInt(c.req.query("limit") || "50"), 100);
421 await ensureContrailReady(db);
422
423 const rows = await db
424 .prepare("SELECT uri, record FROM records_strata ORDER BY time_us DESC LIMIT ?")
425 .bind(limit)
426 .all<{ uri: string; record: string }>();
427
428 const islands: any[] = [];
429 for (const row of rows.results || []) {
430 try {
431 const rec = JSON.parse(row.record);
432 const lexmin = rec.source?.uri;
433 if (!lexmin) continue;
434
435 // Compute stable ID from lexmin
436 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(lexmin));
437 const id = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
438
439 islands.push({
440 id,
441 lexmin,
442 title: rec.analysis?.title || null,
443 recordUri: row.uri,
444 });
445 } catch {}
446 }
447
448 return c.json({ islands });
449 });
450
451 // ── Get single island by ID or AT URI ────────────────────────────
452
453 app.get("/xrpc/org.latha.strata.getIsland", async (c) => {
454 const id = c.req.query("id");
455 if (!id) {
456 return c.json({ error: "MissingRequiredParameter", message: "id is required" }, 400);
457 }
458
459 await ensureContrailReady(db);
460
461 // If it's an AT URI, look up the strata record and derive from its lexmin
462 if (id.startsWith("at://")) {
463 const row = await db
464 .prepare("SELECT uri, record FROM records_strata WHERE uri = ?")
465 .bind(id)
466 .first<{ uri: string; record: string }>();
467
468 if (!row) {
469 return c.json({ error: "RecordNotFound" }, 404);
470 }
471
472 const rec = JSON.parse(row.record);
473 const lexmin = rec.source?.uri;
474 if (!lexmin) {
475 return c.json({ error: "InvalidRecord" }, 400);
476 }
477
478 const island = await deriveIsland(db, lexmin);
479 if (!island) {
480 return c.json({ error: "IslandNotFound" }, 404);
481 }
482
483 const meta = await resolveVertexMeta(db, island.vertices);
484 const analysis = rec.analysis || {};
485
486 return c.json({
487 island: {
488 ...island,
489 lexmin: island.vertices.slice().sort()[0],
490 vertexMeta: Object.fromEntries(meta),
491 summary: analysis.title || null,
492 strata: {
493 prose: analysis.synthesis || "",
494 title: analysis.title || "",
495 themes: analysis.themes || [],
496 relationships: (analysis.connections || []).map((conn: any) => conn.description || ""),
497 tensions: analysis.tensions || [],
498 open_questions: analysis.openQuestions || [],
499 synthesis: analysis.synthesis || "",
500 },
501 },
502 recordUri: row.uri,
503 });
504 }
505
506 // Stable ID — derive from lexmin by reverse-lookup
507 // Find the strata record whose lexmin hashes to this ID
508 const strataRows = await db
509 .prepare("SELECT uri, record FROM records_strata")
510 .all<{ uri: string; record: string }>();
511
512 for (const row of strataRows.results || []) {
513 try {
514 const rec = JSON.parse(row.record);
515 const lexmin = rec.source?.uri;
516 if (!lexmin) continue;
517
518 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(lexmin));
519 const candidateId = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
520
521 if (candidateId === id) {
522 const island = await deriveIsland(db, lexmin);
523 if (!island) continue;
524
525 const meta = await resolveVertexMeta(db, island.vertices);
526 const analysis = rec.analysis || {};
527
528 return c.json({
529 island: {
530 ...island,
531 lexmin: island.vertices.slice().sort()[0],
532 vertexMeta: Object.fromEntries(meta),
533 summary: analysis.title || null,
534 strata: {
535 prose: analysis.synthesis || "",
536 title: analysis.title || "",
537 themes: analysis.themes || [],
538 relationships: (analysis.connections || []).map((conn: any) => conn.description || ""),
539 tensions: analysis.tensions || [],
540 open_questions: analysis.openQuestions || [],
541 synthesis: analysis.synthesis || "",
542 },
543 },
544 recordUri: row.uri,
545 });
546 }
547 } catch {}
548 }
549
550 // No strata record — try deriving island by treating the ID as a lexmin seed
551 // (for islands that haven't been analyzed yet)
552 const island = await deriveIsland(db, id);
553 if (!island) {
554 return c.json({ error: "IslandNotFound" }, 404);
555 }
556
557 const meta = await resolveVertexMeta(db, island.vertices);
558 return c.json({
559 island: {
560 ...island,
561 lexmin: island.vertices.slice().sort()[0],
562 vertexMeta: Object.fromEntries(meta),
563 summary: null,
564 strata: null,
565 },
566 recordUri: null,
567 });
568 });
569
570 // ── List strata records (AT URI-based) ──────────────────────────
571
572 app.get("/xrpc/org.latha.strata.listRecords", async (c) => {
573 const rows = await db
574 .prepare("SELECT uri, record FROM records_strata ORDER BY time_us DESC LIMIT 50")
575 .all<{ uri: string; record: string }>();
576
577 const records = (rows.results || []).map(r => {
578 try {
579 const rec = JSON.parse(r.record);
580 return {
581 uri: r.uri,
582 source: rec.source?.uri || "",
583 title: rec.analysis?.title || "",
584 themes: rec.analysis?.themes || [],
585 createdAt: rec.createdAt || "",
586 };
587 } catch {
588 return null;
589 }
590 }).filter(Boolean);
591
592 return c.json({ records });
593 });
594
595 // ── Strata record endpoint (AT URI-based) ──────────────────────
596
597 app.get("/xrpc/org.latha.strata.getRecord", async (c) => {
598 const uri = c.req.query("uri");
599 if (!uri) {
600 return c.json({ error: "MissingRequiredParameter", message: "uri is required" }, 400);
601 }
602
603 // Fetch the strata record from D1 (indexed by Contrail)
604 const row = await db
605 .prepare("SELECT record FROM records_strata WHERE uri = ?")
606 .bind(uri)
607 .first<{ record: string }>();
608
609 if (!row) {
610 return c.json({ error: "NotFound", message: "Strata record not found" }, 404);
611 }
612
613 let strataRecord: any;
614 try {
615 strataRecord = JSON.parse(row.record);
616 } catch {
617 return c.json({ error: "InvalidRecord" }, 500);
618 }
619
620 // Derive island from lexmin (source.uri)
621 const lexmin = strataRecord.source?.uri;
622 if (!lexmin) {
623 return c.json({ error: "MissingLexmin", message: "Strata record has no source.uri" }, 400);
624 }
625
626 const island = await deriveIsland(db, lexmin);
627 if (!island) {
628 return c.json({ error: "IslandNotFound", message: "Could not derive island from lexmin" }, 404);
629 }
630
631 // Resolve vertex metadata
632 const meta = await resolveVertexMeta(db, island.vertices);
633
634 // Build the response in the same format as the island cache
635 const analysis = strataRecord.analysis || {};
636 const strataData = {
637 prose: analysis.synthesis || "",
638 title: analysis.title || "",
639 themes: analysis.themes || [],
640 relationships: (analysis.connections || []).map((c: any) => c.description || ""),
641 tensions: analysis.tensions || [],
642 open_questions: analysis.openQuestions || [],
643 synthesis: analysis.synthesis || "",
644 };
645
646 return c.json({
647 island: {
648 ...island,
649 vertexMeta: Object.fromEntries(meta),
650 summary: analysis.title || null,
651 strata: strataData,
652 },
653 record: strataRecord,
654 recordUri: uri,
655 });
656 });
657
658 // ── Container-backed xrpc methods ────────────────────────────────
659
660 // Helper: call the strata container
661 async function callContainer(path: string, method: string, body?: any): Promise<any> {
662 const id = env.STRATA_CONTAINER.idFromName("strata");
663 const stub = env.STRATA_CONTAINER.get(id);
664 const url = new URL(path, "http://container");
665 const init: RequestInit = { method };
666 if (body) {
667 init.body = JSON.stringify(body);
668 init.headers = { "Content-Type": "application/json" };
669 }
670 const resp = await stub.fetch(new Request(url.toString(), init));
671 return resp.json();
672 }
673
674 // Derive islands — POST, delegates to container
675 // With seed: single island. Without: all islands.
676 app.post("/xrpc/org.latha.strata.deriveIsland", async (c) => {
677 const body = await c.req.json().catch(() => ({})) as { seed?: string };
678 const seed = body.seed;
679
680 // Load all connections from D1 for the container to traverse
681 await ensureContrailReady(db);
682 const rows = await db
683 .prepare(
684 `SELECT r.record, r.did, r.rkey, i.handle
685 FROM records_connection r
686 LEFT JOIN identities i ON r.did = i.did`,
687 )
688 .all<{ record: string; did: string; rkey: string; handle: string | null }>();
689
690 const connections = (rows.results || []).map(r => {
691 try {
692 const value = JSON.parse(r.record);
693 return {
694 source: value.source,
695 target: value.target,
696 connectionType: value.connectionType || "relates",
697 note: value.note || "",
698 did: r.did,
699 rkey: r.rkey,
700 };
701 } catch {
702 return null;
703 }
704 }).filter(Boolean);
705
706 try {
707 const result = await callContainer("/deriveIsland", "POST", { connections, seed: seed || undefined });
708 return c.json(result);
709 } catch (e: any) {
710 return c.json({ error: "ContainerError", message: e.message }, 500);
711 }
712 });
713
714 // Run strata analysis — delegates to container
715 app.post("/xrpc/org.latha.strata.analyze", async (c) => {
716 const body = await c.req.json().catch(() => ({}));
717 if (!body.island) {
718 return c.json({ error: "MissingRequiredField", message: "island is required" }, 400);
719 }
720
721 try {
722 const result = await callContainer("/analyze", "POST", body);
723 return c.json(result);
724 } catch (e: any) {
725 return c.json({ error: "ContainerError", message: e.message }, 500);
726 }
727 });
728
729 // ── R2 sync endpoints ───────────────────────────────────────────
730
731 app.put("/api/sync/vault/:did/*", async (c) => {
732 const did = c.req.param("did");
733 const path = c.req.param("path");
734 if (!did || !path) {
735 return c.json({ error: "Missing path" }, 400);
736 }
737
738 const key = `${did}/${path}`;
739 const body = await c.req.raw.arrayBuffer();
740 await env.VAULT_BUCKET.put(key, body, {
741 httpMetadata: { contentType: c.req.header("content-type") || "text/markdown" },
742 });
743
744 return c.json({ ok: true, key });
745 });
746
747 app.put("/api/sync/carry/:did/*", async (c) => {
748 const did = c.req.param("did");
749 const path = c.req.param("path");
750 if (!did || !path) {
751 return c.json({ error: "Missing path" }, 400);
752 }
753
754 const key = `${did}/${path}`;
755 const body = await c.req.raw.arrayBuffer();
756 await env.CARRY_BUCKET.put(key, body, {
757 httpMetadata: { contentType: c.req.header("content-type") || "application/json" },
758 });
759
760 return c.json({ ok: true, key });
761 });
762
763 // ── Graph neighborhood query ────────────────────────────────────
764
765 app.get("/xrpc/org.latha.strata.connection.getGraph", async (c) => {
766 const uri = c.req.query("uri");
767 if (!uri) {
768 return c.json({ error: "MissingRequiredParameter", message: "uri is required" }, 400);
769 }
770
771 const depth = Math.min(parseInt(c.req.query("depth") || "2"), 3);
772 const limit = Math.min(parseInt(c.req.query("limit") || "50"), 100);
773 const types = c.req.query("types")?.split(",").map((t) => t.trim());
774
775 // Reuse island detection for the subgraph
776 const islands = await detectIslands(db);
777 const island = islands.find(i => i.vertices.includes(uri));
778
779 if (!island) {
780 return c.json({ connections: [], resources: [], depth, uri });
781 }
782
783 // Convert to graph format
784 const resources = island.vertices.map(v => ({
785 uri: v,
786 title: v,
787 type: "unknown",
788 }));
789
790 return c.json({
791 connections: island.edges,
792 resources,
793 depth,
794 uri,
795 });
796 });
797
798 // ── OAuth client metadata ──────────────────────────────────────
799
800 app.get("/oauth-client-metadata.json", (c) => {
801 const host = new URL(c.req.url).host;
802 return c.json({
803 client_id: `https://${host}/oauth-client-metadata.json`,
804 client_name: "Stigmergic",
805 client_uri: `https://${host}`,
806 redirect_uris: [`https://${host}/`],
807 scope: "atproto transition:generic",
808 grant_types: ["authorization_code", "refresh_token"],
809 response_types: ["code"],
810 token_endpoint_auth_method: "none",
811 application_type: "web",
812 dpop_bound_access_tokens: true,
813 });
814 });
815
816 // ── SPA fallback: serve landing page for client-side routes ──────
817 for (const path of ["/island", "/strata", "/connect"]) {
818 app.get(path, async (c) => {
819 let islandsJson = "[]";
820 try {
821 await ensureContrailReady(db);
822 const rows = await db
823 .prepare("SELECT uri, record FROM records_strata ORDER BY time_us DESC LIMIT 50")
824 .all<{ uri: string; record: string }>();
825 const islands: any[] = [];
826 for (const row of rows.results || []) {
827 try {
828 const rec = JSON.parse(row.record);
829 const lexmin = rec.source?.uri;
830 if (!lexmin) continue;
831 const lexminHash = await crypto.subtle.digest("SHA-256", new TextEncoder().encode(lexmin));
832 const id = Array.from(new Uint8Array(lexminHash)).map(b => b.toString(16).padStart(2, "0")).join("").slice(0, 16);
833 islands.push({ id, lexmin, title: rec.analysis?.title || null, recordUri: row.uri });
834 } catch {}
835 }
836 islandsJson = JSON.stringify(islands);
837 } catch {}
838
839 const page = LANDING_PAGE.replace(
840 "</head>",
841 `<script>window.__ISLANDS__=${islandsJson};</script></head>`,
842 );
843 return c.html(page);
844 });
845 }
846
847 // ── All other routes pass through to contrail ──────────────────
848
849 app.all("*", async (c) => {
850 const response = await contrailWorker.fetch(
851 c.req.raw,
852 c.env as unknown as Record<string, unknown>,
853 );
854 return response;
855 });
856
857 return app;
858}
859
860// ─── Export ─────────────────────────────────────────────────────────
861
862export { StrataContainer };
863
864export default {
865 fetch(request: Request, env: Env): Response | Promise<Response> {
866 app ??= buildApp(env);
867 return app.fetch(request, env);
868 },
869 async scheduled(event: ScheduledEvent, env: Env, ctx: ExecutionContext) {
870 // Run Contrail indexing
871 await contrailWorker.scheduled(
872 event,
873 env as unknown as Record<string, unknown>,
874 ctx,
875 );
876 },
877};
878