pr_01m47d15m3e54sn21z27rpy5n9/apps/api/src/openapi.ts
| 1 | import { operationsByName } from "./operations"; |
| 2 | |
| 3 | /** What the OpenAPI document needs to know about a REST route. */ |
| 4 | export type RouteDoc = { |
| 5 | method: "GET" | "POST"; |
| 6 | path: string; |
| 7 | operation: string; |
| 8 | tag: string; |
| 9 | }; |
| 10 | |
| 11 | const ERROR = { $ref: "#/components/schemas/Error" }; |
| 12 | |
| 13 | function errorResponse(description: string) { |
| 14 | return { |
| 15 | description, |
| 16 | content: { "application/json": { schema: ERROR } }, |
| 17 | }; |
| 18 | } |
| 19 | |
| 20 | /** A short title from an operation name: `open_intent` is "Open intent". */ |
| 21 | function title(operation: string): string { |
| 22 | if (operation === "whoami") return "Get the current user"; |
| 23 | const words = operation.split("_").join(" "); |
| 24 | return words[0].toUpperCase() + words.slice(1); |
| 25 | } |
| 26 | |
| 27 | /** Hono's `:name` path parameters as OpenAPI's `{name}`. */ |
| 28 | function openApiPath(path: string): string { |
| 29 | return path.replace(/:([a-z_]+)/g, "{$1}"); |
| 30 | } |
| 31 | |
| 32 | /** Hand-written entries for device sign-in, which is not an operation. */ |
| 33 | const ONBOARDING = { |
| 34 | "/v1/device/code": { |
| 35 | post: { |
| 36 | operationId: "device_code", |
| 37 | tags: ["Accounts"], |
| 38 | summary: "Start signing in", |
| 39 | description: |
| 40 | "Begins a device sign-in. Show the person `verification_uri_complete` and have them open it in a browser, where they sign in or register and approve the code. Then poll `/v1/device/token`.", |
| 41 | security: [], |
| 42 | requestBody: { |
| 43 | content: { |
| 44 | "application/json": { |
| 45 | schema: { |
| 46 | type: "object", |
| 47 | properties: { |
| 48 | client_name: { |
| 49 | type: "string", |
| 50 | description: "What is asking, shown to the person approving. For example, Claude Code.", |
| 51 | }, |
| 52 | }, |
| 53 | }, |
| 54 | }, |
| 55 | }, |
| 56 | }, |
| 57 | responses: { |
| 58 | "200": { |
| 59 | description: "The codes for this sign-in.", |
| 60 | content: { |
| 61 | "application/json": { |
| 62 | schema: { |
| 63 | type: "object", |
| 64 | properties: { |
| 65 | device_code: { type: "string", description: "Secret. Send it to /v1/device/token." }, |
| 66 | user_code: { type: "string", description: "Shown to the person, like WDJB-MJHT." }, |
| 67 | verification_uri: { type: "string" }, |
| 68 | verification_uri_complete: { |
| 69 | type: "string", |
| 70 | description: "The link to give the person; it carries the code.", |
| 71 | }, |
| 72 | expires_in: { type: "integer", description: "Seconds until the codes expire." }, |
| 73 | interval: { type: "integer", description: "Seconds to wait between polls." }, |
| 74 | }, |
| 75 | }, |
| 76 | }, |
| 77 | }, |
| 78 | }, |
| 79 | }, |
| 80 | }, |
| 81 | }, |
| 82 | "/v1/device/token": { |
| 83 | post: { |
| 84 | operationId: "device_token", |
| 85 | tags: ["Accounts"], |
| 86 | summary: "Finish signing in", |
| 87 | description: |
| 88 | "Asks whether the person has approved. Poll no faster than the interval. The token is returned once.", |
| 89 | security: [], |
| 90 | requestBody: { |
| 91 | required: true, |
| 92 | content: { |
| 93 | "application/json": { |
| 94 | schema: { |
| 95 | type: "object", |
| 96 | required: ["device_code"], |
| 97 | properties: { device_code: { type: "string" } }, |
| 98 | }, |
| 99 | }, |
| 100 | }, |
| 101 | }, |
| 102 | responses: { |
| 103 | "200": { |
| 104 | description: "The state of the sign-in.", |
| 105 | content: { |
| 106 | "application/json": { |
| 107 | schema: { |
| 108 | type: "object", |
| 109 | required: ["status"], |
| 110 | properties: { |
| 111 | status: { type: "string", enum: ["pending", "approved", "denied", "expired"] }, |
| 112 | token: { type: "string", description: "Present when approved." }, |
| 113 | username: { type: "string" }, |
| 114 | verified: { |
| 115 | type: "boolean", |
| 116 | description: "Whether the account's email is confirmed.", |
| 117 | }, |
| 118 | }, |
| 119 | }, |
| 120 | }, |
| 121 | }, |
| 122 | }, |
| 123 | }, |
| 124 | }, |
| 125 | }, |
| 126 | }; |
| 127 | |
| 128 | /** The OpenAPI document, generated from the same list the routes are. */ |
| 129 | export function openApiDocument(routes: RouteDoc[]) { |
| 130 | const paths: Record<string, Record<string, unknown>> = { ...ONBOARDING }; |
| 131 | for (const route of routes) { |
| 132 | const operation = operationsByName.get(route.operation)!; |
| 133 | const pathParams = [...route.path.matchAll(/:([a-z_]+)/g)].map((match) => match[1]); |
| 134 | // `owner` and `name` in the path stand for the operation's `repo` input. |
| 135 | const covered = new Set([...pathParams, "repo"]); |
| 136 | const inputs = Object.entries(operation.input.properties).filter( |
| 137 | ([name]) => !covered.has(name), |
| 138 | ); |
| 139 | const required = (operation.input.required ?? []).filter( |
| 140 | (name) => !covered.has(name), |
| 141 | ); |
| 142 | |
| 143 | const parameters: unknown[] = pathParams.map((name) => ({ |
| 144 | name, |
| 145 | in: "path", |
| 146 | required: true, |
| 147 | schema: { type: name === "number" ? "integer" : "string" }, |
| 148 | })); |
| 149 | let requestBody: unknown; |
| 150 | if (route.method === "GET") { |
| 151 | for (const [name, schema] of inputs) { |
| 152 | parameters.push({ |
| 153 | // The repository search parameter is `q` on the wire. |
| 154 | name: route.operation === "list_repos" && name === "query" ? "q" : name, |
| 155 | in: "query", |
| 156 | required: false, |
| 157 | schema, |
| 158 | }); |
| 159 | } |
| 160 | } else if (inputs.length > 0) { |
| 161 | requestBody = { |
| 162 | required: required.length > 0, |
| 163 | content: { |
| 164 | "application/json": { |
| 165 | schema: { |
| 166 | type: "object", |
| 167 | properties: Object.fromEntries(inputs), |
| 168 | ...(required.length > 0 ? { required } : {}), |
| 169 | }, |
| 170 | }, |
| 171 | }, |
| 172 | }; |
| 173 | } |
| 174 | |
| 175 | const path = openApiPath(route.path); |
| 176 | paths[path] ??= {}; |
| 177 | paths[path][route.method.toLowerCase()] = { |
| 178 | operationId: route.operation, |
| 179 | tags: [route.tag], |
| 180 | summary: title(route.operation), |
| 181 | description: operation.description, |
| 182 | parameters, |
| 183 | ...(requestBody ? { requestBody } : {}), |
| 184 | responses: { |
| 185 | "200": { |
| 186 | description: "Success.", |
| 187 | content: { "application/json": { schema: {} } }, |
| 188 | }, |
| 189 | "401": errorResponse("A token is required, or the one sent is not valid."), |
| 190 | "403": errorResponse("Signed in, but not allowed to do this."), |
| 191 | "404": errorResponse("It does not exist, or you cannot see it."), |
| 192 | "409": errorResponse("The request conflicts with the current state."), |
| 193 | "422": errorResponse("The input is not valid."), |
| 194 | }, |
| 195 | }; |
| 196 | } |
| 197 | |
| 198 | return { |
| 199 | openapi: "3.1.0", |
| 200 | info: { |
| 201 | title: "g1t API", |
| 202 | version: "1", |
| 203 | description: |
| 204 | "The REST API for g1t, a git forge built for agents. The same operations are available to agents as MCP tools at https://mcp.g1t.sh.", |
| 205 | license: { name: "MIT", identifier: "MIT" }, |
| 206 | }, |
| 207 | servers: [{ url: "https://api.g1t.sh" }], |
| 208 | security: [{ token: [] }, {}], |
| 209 | tags: [ |
| 210 | { name: "Accounts", description: "Signing in from a tool, and the current user." }, |
| 211 | { name: "Repositories" }, |
| 212 | { name: "Intents", description: "Goals stated against a repository." }, |
| 213 | { name: "Attempts", description: "An agent's or person's run at an intent." }, |
| 214 | { name: "Sessions", description: "The record of how an attempt was made." }, |
| 215 | ], |
| 216 | paths, |
| 217 | components: { |
| 218 | securitySchemes: { |
| 219 | token: { |
| 220 | type: "http", |
| 221 | scheme: "bearer", |
| 222 | description: "An access token, `g1t_…`. Public data needs none.", |
| 223 | }, |
| 224 | }, |
| 225 | schemas: { |
| 226 | Error: { |
| 227 | type: "object", |
| 228 | required: ["error"], |
| 229 | properties: { |
| 230 | error: { |
| 231 | type: "object", |
| 232 | required: ["code", "message"], |
| 233 | properties: { |
| 234 | code: { |
| 235 | type: "string", |
| 236 | enum: ["unauthenticated", "forbidden", "not_found", "conflict", "invalid"], |
| 237 | }, |
| 238 | message: { type: "string" }, |
| 239 | }, |
| 240 | }, |
| 241 | }, |
| 242 | }, |
| 243 | }, |
| 244 | }, |
| 245 | }; |
| 246 | } |