20 lines
839 B
TypeScript
20 lines
839 B
TypeScript
import { Flag } from "@opencode-ai/core/flag/flag"
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import { Effect } from "effect"
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import { HttpRouter, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
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import * as Fence from "@/server/shared/fence"
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const ignoredMethods = new Set(["GET", "HEAD", "OPTIONS"])
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export const fenceLayer = HttpRouter.middleware<{ handles: unknown }>()((effect) =>
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Effect.gen(function* () {
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const request = yield* HttpServerRequest.HttpServerRequest
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if (!Flag.OPENCODE_WORKSPACE_ID || ignoredMethods.has(request.method)) return yield* effect
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const previous = Fence.load()
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const response = yield* effect
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const current = Fence.diff(previous, Fence.load())
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if (Object.keys(current).length === 0) return response
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return HttpServerResponse.setHeader(response, Fence.HEADER, JSON.stringify(current))
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}),
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).layer
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