commit 74ae5ca828b05fe89647fce6d5c821bc601e6cdd · gmstn.systems/lattice

+18

src/lib/types/constellation.ts

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       import { didSchema, nsidSchema } from "@/lib/types/atproto";

     

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       import { z } from "zod";

     

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       export const constellationBacklinkSchema = z.object({

     

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           did: didSchema,

     

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           collection: nsidSchema,

     

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           rkey: z.string(),

     

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       });

     

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       export type ConstellationBacklink = z.infer<typeof constellationBacklinkSchema>;

     

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       export const constellationBacklinkResponseSchema = z.object({

     

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           total: z.number(),

     

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           records: z.array(constellationBacklinkSchema),

     

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           cursor: z.optional(z.string().nullish()),

     

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       });

     

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       export type ConstellationBacklinkResponse = z.infer<

     

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           typeof constellationBacklinkResponseSchema

     

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       >;

+73

src/lib/utils/constellation.ts

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       import { CONSTELLATION_URL } from "@/lib/env";

     

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       import type { AtUri } from "@/lib/types/atproto";

     

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       import type {

     

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           ConstellationBacklink,

     

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           ConstellationBacklinkResponse,

     

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       } from "@/lib/types/constellation";

     

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       import { constellationBacklinkResponseSchema } from "@/lib/types/constellation";

     

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       import { getRecordFromAtUri } from "@/lib/utils/atproto";

     

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       import type { Result } from "@/lib/utils/result";

     

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       import type { ZodError } from "zod";

     

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       export const getConstellationBacklink = async ({

     

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           subject,

     

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           source,

     

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       }: {

     

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           subject: string;

     

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           source: {

     

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               nsid: string;

     

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               fieldName?: string;

     

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           };

     

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       }): Promise<

     

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           Result<

     

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               ConstellationBacklinkResponse,

     

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               ZodError | { message: string; fetchStatus: number }

     

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           >

     

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       > => {

     

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           const { nsid, fieldName } = source;

     

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           const sourceParam = fieldName ? `${nsid}:${fieldName}` : nsid;

     

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           const req = new Request(

     

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               `${CONSTELLATION_URL.origin}/xrpc/blue.microcosm.links.getBacklinks?subject=${encodeURIComponent(subject)}&source=${encodeURIComponent(sourceParam)}`,

     

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           );

     

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           const res = await fetch(req);

     

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           if (!res.ok)

     

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               return {

     

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                   ok: false,

     

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                   error: {

     

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                       message: "Fetch request to Constellation did not return 200.",

     

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                       fetchStatus: res.status,

     

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                   },

     

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               };

     

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           const data: unknown = await res.json();

     

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           const {

     

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               success,

     

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               error,

     

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               data: constellationResponse,

     

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           } = constellationBacklinkResponseSchema.safeParse(data);

     

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           if (!success) {

     

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               return { ok: false, error };

     

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           } else return { ok: true, data: constellationResponse };

     

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       };

     

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       export const getPdsRecordFromBacklink = async (

     

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           backlink: ConstellationBacklink,

     

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       ): Promise<Result<unknown, unknown>> => {

     

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           const atUri = createAtUriFromBacklink(backlink);

     

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           const atUriRecordResult = await getRecordFromAtUri(atUri);

     

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           if (!atUriRecordResult.ok)

     

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               return { ok: false, error: atUriRecordResult.error };

     

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           return { ok: true, data: atUriRecordResult.data };

     

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       };

     

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       export const createAtUriFromBacklink = (

     

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           backlink: ConstellationBacklink,

     

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       ): Required<AtUri> => {

     

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           const { did: authority, collection, rkey: rKey } = backlink;

     

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           // @ts-expect-error tempalte literal issues

     

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           return { authority, collection, rKey };

     

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       };