| 1 | import * as sitewise from "@distilled.cloud/aws/iotsitewise"; |
| 2 | import * as Effect from "effect/Effect"; |
| 3 | import { diffTags } from "../../Tags.ts"; |
| 4 | |
| 5 | /** |
| 6 | * Fetch the observed tags on an IoT SiteWise resource ARN as a plain |
| 7 | * string map (SiteWise's TagMap allows `undefined` values on the wire). |
| 8 | */ |
| 9 | export const fetchSiteWiseTags = Effect.fn(function* (arn: string) { |
| 10 | const response = yield* sitewise |
| 11 | .listTagsForResource({ resourceArn: arn }) |
| 12 | .pipe( |
| 13 | Effect.catchTag("ResourceNotFoundException", () => |
| 14 | Effect.succeed(undefined), |
| 15 | ), |
| 16 | ); |
| 17 | const tags: Record<string, string> = {}; |
| 18 | for (const [key, value] of Object.entries(response?.tags ?? {})) { |
| 19 | if (value !== undefined) tags[key] = value; |
| 20 | } |
| 21 | return tags; |
| 22 | }); |
| 23 | |
| 24 | /** |
| 25 | * Converge the tags on a SiteWise resource ARN from the observed cloud |
| 26 | * tags to the desired map (untag removed keys, upsert added/changed). |
| 27 | */ |
| 28 | export const syncSiteWiseTags = Effect.fn(function* ( |
| 29 | arn: string, |
| 30 | observed: Record<string, string>, |
| 31 | desired: Record<string, string>, |
| 32 | ) { |
| 33 | const { removed, upsert } = diffTags(observed, desired); |
| 34 | if (removed.length > 0) { |
| 35 | yield* sitewise.untagResource({ resourceArn: arn, tagKeys: removed }); |
| 36 | } |
| 37 | if (upsert.length > 0) { |
| 38 | yield* sitewise.tagResource({ |
| 39 | resourceArn: arn, |
| 40 | tags: Object.fromEntries(upsert.map((tag) => [tag.Key, tag.Value])), |
| 41 | }); |
| 42 | } |
| 43 | }); |
| 44 | |
| 45 | /** |
| 46 | * Deep-project `observed` onto the key structure of `desired`: for every |
| 47 | * key path present in `desired`, take the observed value. Keys the caller |
| 48 | * never specified (server-side defaults like `processingConfig` or |
| 49 | * generated `path` segments) are dropped so they don't read as drift. |
| 50 | */ |
| 51 | const projectLike = (desired: unknown, observed: unknown): unknown => { |
| 52 | if (Array.isArray(desired)) { |
| 53 | if (!Array.isArray(observed)) return observed; |
| 54 | return desired.map((item, index) => projectLike(item, observed[index])); |
| 55 | } |
| 56 | if (desired !== null && typeof desired === "object") { |
| 57 | if ( |
| 58 | observed === null || |
| 59 | typeof observed !== "object" || |
| 60 | Array.isArray(observed) |
| 61 | ) { |
| 62 | return observed; |
| 63 | } |
| 64 | const out: Record<string, unknown> = {}; |
| 65 | for (const [key, value] of Object.entries( |
| 66 | desired as Record<string, unknown>, |
| 67 | )) { |
| 68 | if (value === undefined) continue; |
| 69 | out[key] = projectLike(value, (observed as Record<string, unknown>)[key]); |
| 70 | } |
| 71 | return out; |
| 72 | } |
| 73 | return observed; |
| 74 | }; |
| 75 | |
| 76 | const stripUndefined = (value: unknown): unknown => |
| 77 | value === undefined ? undefined : JSON.parse(JSON.stringify(value)); |
| 78 | |
| 79 | /** |
| 80 | * Structural equality between a desired shape and the observed cloud |
| 81 | * state, ignoring observed-only keys (server defaults, generated ids the |
| 82 | * caller didn't pin, etc.). |
| 83 | */ |
| 84 | export const matchesDesired = (desired: unknown, observed: unknown): boolean => |
| 85 | JSON.stringify(stripUndefined(desired)) === |
| 86 | JSON.stringify(stripUndefined(projectLike(desired, observed))); |