Merge pull request #2243 from RishabhAgarwal-2001/2087-openapi

packages/hoppscotch-app/helpers/functional/json.ts

@@ -9,6 +9,14 @@ import { flow } from "fp-ts/function"
 export const safeParseJSON = (str: string): O.Option<object> =>
   O.tryCatch(() => JSON.parse(str))
 
+/**
+ * Generates a prettified JSON representation of an object
+ * @param obj The object to get the representation of
+ * @returns The prettified JSON string of the object
+ */
+export const prettyPrintJSON = (obj: unknown): O.Option<string> =>
+  O.tryCatch(() => JSON.stringify(obj, null, "\t"))
+
 /**
  * Checks if given string is a JSON string
  * @param str Raw string to be checked

packages/hoppscotch-app/helpers/import-export/import/openapi/exampleV2.ts

@@ -0,0 +1,185 @@
+import { OpenAPIV2 } from "openapi-types"
+import * as O from "fp-ts/Option"
+import { pipe, flow } from "fp-ts/function"
+import * as A from "fp-ts/Array"
+import { prettyPrintJSON } from "~/helpers/functional/json"
+
+type PrimitiveSchemaType = "string" | "integer" | "number" | "boolean"
+
+type SchemaType = "array" | "object" | PrimitiveSchemaType
+
+type PrimitiveRequestBodyExample = number | string | boolean
+
+type RequestBodyExample =
+  | { [name: string]: RequestBodyExample }
+  | Array<RequestBodyExample>
+  | PrimitiveRequestBodyExample
+
+const getPrimitiveTypePlaceholder = (
+  schemaType: PrimitiveSchemaType
+): PrimitiveRequestBodyExample => {
+  switch (schemaType) {
+    case "string":
+      return "string"
+    case "integer":
+    case "number":
+      return 1
+    case "boolean":
+      return true
+  }
+}
+
+const getSchemaTypeFromSchemaObject = (
+  schema: OpenAPIV2.SchemaObject
+): O.Option<SchemaType> =>
+  pipe(
+    schema.type,
+    O.fromNullable,
+    O.map(
+      (schemaType) =>
+        (Array.isArray(schemaType) ? schemaType[0] : schemaType) as SchemaType
+    )
+  )
+
+const isSchemaTypePrimitive = (
+  schemaType: string
+): schemaType is PrimitiveSchemaType =>
+  ["string", "integer", "number", "boolean"].includes(schemaType)
+
+const isSchemaTypeArray = (schemaType: string): schemaType is "array" =>
+  schemaType === "array"
+
+const isSchemaTypeObject = (schemaType: string): schemaType is "object" =>
+  schemaType === "object"
+
+const getSampleEnumValueOrPlaceholder = (
+  schema: OpenAPIV2.SchemaObject
+): RequestBodyExample =>
+  pipe(
+    schema.enum,
+    O.fromNullable,
+    O.map((enums) => enums[0] as RequestBodyExample),
+    O.altW(() =>
+      pipe(
+        schema,
+        getSchemaTypeFromSchemaObject,
+        O.filter(isSchemaTypePrimitive),
+        O.map(getPrimitiveTypePlaceholder)
+      )
+    ),
+    O.getOrElseW(() => "")
+  )
+
+const generateExampleArrayFromOpenAPIV2ItemsObject = (
+  items: OpenAPIV2.ItemsObject
+): RequestBodyExample =>
+  // ItemsObject can not hold type "object"
+  // https://swagger.io/specification/v2/#itemsObject
+
+  // TODO : Handle array of objects
+  // https://stackoverflow.com/questions/60490974/how-to-define-an-array-of-objects-in-openapi-2-0
+
+  pipe(
+    items,
+    O.fromPredicate(
+      flow((items) => items.type as SchemaType, isSchemaTypePrimitive)
+    ),
+    O.map(
+      flow(getSampleEnumValueOrPlaceholder, (arrayItem) => [
+        arrayItem,
+        arrayItem,
+      ])
+    ),
+    O.getOrElse(() =>
+      // If the type is not primitive, it is "array"
+      // items property is required if type is array
+      [
+        generateExampleArrayFromOpenAPIV2ItemsObject(
+          items.items as OpenAPIV2.ItemsObject
+        ),
+      ]
+    )
+  )
+
+const generateRequestBodyExampleFromOpenAPIV2BodySchema = (
+  schema: OpenAPIV2.SchemaObject
+): RequestBodyExample => {
+  if (schema.example) return schema.example as RequestBodyExample
+
+  const primitiveTypeExample = pipe(
+    schema,
+    O.fromPredicate(
+      flow(
+        getSchemaTypeFromSchemaObject,
+        O.map(isSchemaTypePrimitive),
+        O.getOrElseW(() => false) // No schema type found in the schema object, assume non-primitive
+      )
+    ),
+    O.map(getSampleEnumValueOrPlaceholder) // Use enum or placeholder to populate primitive field
+  )
+
+  if (O.isSome(primitiveTypeExample)) return primitiveTypeExample.value
+
+  const arrayTypeExample = pipe(
+    schema,
+    O.fromPredicate(
+      flow(
+        getSchemaTypeFromSchemaObject,
+        O.map(isSchemaTypeArray),
+        O.getOrElseW(() => false) // No schema type found in the schema object, assume type to be different from array
+      )
+    ),
+    O.map((schema) => schema.items as OpenAPIV2.ItemsObject),
+    O.map(generateExampleArrayFromOpenAPIV2ItemsObject)
+  )
+
+  if (O.isSome(arrayTypeExample)) return arrayTypeExample.value
+
+  return pipe(
+    schema,
+    O.fromPredicate(
+      flow(
+        getSchemaTypeFromSchemaObject,
+        O.map(isSchemaTypeObject),
+        O.getOrElseW(() => false)
+      )
+    ),
+    O.chain((schema) =>
+      pipe(
+        schema.properties,
+        O.fromNullable,
+        O.map(
+          (properties) =>
+            Object.entries(properties) as [string, OpenAPIV2.SchemaObject][]
+        )
+      )
+    ),
+    O.getOrElseW(() => [] as [string, OpenAPIV2.SchemaObject][]),
+    A.reduce(
+      {} as { [name: string]: RequestBodyExample },
+      (aggregatedExample, property) => {
+        const example = generateRequestBodyExampleFromOpenAPIV2BodySchema(
+          property[1]
+        )
+        aggregatedExample[property[0]] = example
+        return aggregatedExample
+      }
+    )
+  )
+}
+
+export const generateRequestBodyExampleFromOpenAPIV2Body = (
+  op: OpenAPIV2.OperationObject
+): string =>
+  pipe(
+    (op.parameters ?? []) as OpenAPIV2.Parameter[],
+    A.findFirst((param) => param.in === "body"),
+    O.map(
+      flow(
+        (parameter) => parameter.schema,
+        generateRequestBodyExampleFromOpenAPIV2BodySchema
+      )
+    ),
+    O.chain(prettyPrintJSON),
+    O.getOrElse(() => "")
+  )

packages/hoppscotch-app/helpers/import-export/import/openapi/exampleV3.ts

@@ -0,0 +1,109 @@
+import { OpenAPIV3 } from "openapi-types"
+import { pipe } from "fp-ts/function"
+import * as O from "fp-ts/Option"
+import { tupleToRecord } from "~/helpers/functional/record"
+
+type SchemaType =
+  | OpenAPIV3.ArraySchemaObjectType
+  | OpenAPIV3.NonArraySchemaObjectType
+
+type PrimitiveSchemaType = Exclude<SchemaType, "array" | "object">
+
+type PrimitiveRequestBodyExample = string | number | boolean | null
+
+type RequestBodyExample =
+  | PrimitiveRequestBodyExample
+  | Array<RequestBodyExample>
+  | { [name: string]: RequestBodyExample }
+
+const isSchemaTypePrimitive = (
+  schemaType: SchemaType
+): schemaType is PrimitiveSchemaType =>
+  !["array", "object"].includes(schemaType)
+
+const getPrimitiveTypePlaceholder = (
+  primitiveType: PrimitiveSchemaType
+): PrimitiveRequestBodyExample => {
+  switch (primitiveType) {
+    case "number":
+      return 0.0
+    case "integer":
+      return 0
+    case "string":
+      return "string"
+    case "boolean":
+      return true
+  }
+}
+
+// Use carefully, call only when type is primitive
+// TODO(agarwal): Use Enum values, if any
+const generatePrimitiveRequestBodyExample = (
+  schemaObject: OpenAPIV3.NonArraySchemaObject
+): RequestBodyExample =>
+  getPrimitiveTypePlaceholder(schemaObject.type as PrimitiveSchemaType)
+
+// Use carefully, call only when type is object
+const generateObjectRequestBodyExample = (
+  schemaObject: OpenAPIV3.NonArraySchemaObject
+): RequestBodyExample =>
+  pipe(
+    schemaObject.properties,
+    O.fromNullable,
+    O.map(Object.entries),
+    O.getOrElseW(() => [] as [string, OpenAPIV3.SchemaObject][]),
+    tupleToRecord
+  )
+
+const generateArrayRequestBodyExample = (
+  schemaObject: OpenAPIV3.ArraySchemaObject
+): RequestBodyExample => [
+  generateRequestBodyExampleFromSchemaObject(
+    schemaObject.items as OpenAPIV3.SchemaObject
+  ),
+]
+
+const generateRequestBodyExampleFromSchemaObject = (
+  schemaObject: OpenAPIV3.SchemaObject
+): RequestBodyExample => {
+  // TODO: Handle schema objects with allof
+  if (schemaObject.example) return schemaObject.example as RequestBodyExample
+
+  // If request body can be oneof or allof several schema, choose the first schema to generate an example
+  if (schemaObject.oneOf)
+    return generateRequestBodyExampleFromSchemaObject(
+      schemaObject.oneOf[0] as OpenAPIV3.SchemaObject
+    )
+  if (schemaObject.anyOf)
+    return generateRequestBodyExampleFromSchemaObject(
+      schemaObject.anyOf[0] as OpenAPIV3.SchemaObject
+    )
+
+  if (!schemaObject.type) return ""
+
+  if (isSchemaTypePrimitive(schemaObject.type))
+    return generatePrimitiveRequestBodyExample(
+      schemaObject as OpenAPIV3.NonArraySchemaObject
+    )
+
+  if (schemaObject.type === "object")
+    return generateObjectRequestBodyExample(
+      schemaObject as OpenAPIV3.NonArraySchemaObject
+    )
+
+  return generateArrayRequestBodyExample(
+    schemaObject as OpenAPIV3.ArraySchemaObject
+  )
+}
+
+export const generateRequestBodyExampleFromMediaObject = (
+  mediaObject: OpenAPIV3.MediaTypeObject
+): RequestBodyExample => {
+  if (mediaObject.example) return mediaObject.example as RequestBodyExample
+  if (mediaObject.examples) return mediaObject.examples[0] as RequestBodyExample
+  return mediaObject.schema
+    ? generateRequestBodyExampleFromSchemaObject(
+        mediaObject.schema as OpenAPIV3.SchemaObject
+      )
+    : ""
+}

packages/hoppscotch-app/helpers/import-export/import/openapi/exampleV31.ts

@@ -0,0 +1,129 @@
+import { OpenAPIV3_1 as OpenAPIV31 } from "openapi-types"
+import { pipe } from "fp-ts/function"
+import * as O from "fp-ts/Option"
+import * as A from "fp-ts/Array"
+
+type MixedArraySchemaType = (
+  | OpenAPIV31.ArraySchemaObjectType
+  | OpenAPIV31.NonArraySchemaObjectType
+)[]
+
+type SchemaType =
+  | OpenAPIV31.ArraySchemaObjectType
+  | OpenAPIV31.NonArraySchemaObjectType
+  | MixedArraySchemaType
+
+type PrimitiveSchemaType = Exclude<
+  OpenAPIV31.NonArraySchemaObjectType,
+  "object"
+>
+
+type PrimitiveRequestBodyExample = string | number | boolean | null
+
+type RequestBodyExample =
+  | PrimitiveRequestBodyExample
+  | Array<RequestBodyExample>
+  | { [name: string]: RequestBodyExample }
+
+const isSchemaTypePrimitive = (
+  schemaType: SchemaType
+): schemaType is PrimitiveSchemaType =>
+  !Array.isArray(schemaType) && !["array", "object"].includes(schemaType)
+
+const getPrimitiveTypePlaceholder = (
+  primitiveType: PrimitiveSchemaType
+): PrimitiveRequestBodyExample => {
+  switch (primitiveType) {
+    case "number":
+      return 0.0
+    case "integer":
+      return 0
+    case "string":
+      return "string"
+    case "boolean":
+      return true
+  }
+  return null
+}
+
+// Use carefully, the schema type should necessarily be primitive
+// TODO(agarwal): Use Enum values, if any
+const generatePrimitiveRequestBodyExample = (
+  schemaObject: OpenAPIV31.NonArraySchemaObject
+): RequestBodyExample =>
+  getPrimitiveTypePlaceholder(schemaObject.type as PrimitiveSchemaType)
+
+// Use carefully, the schema type should necessarily be object
+const generateObjectRequestBodyExample = (
+  schemaObject: OpenAPIV31.NonArraySchemaObject
+): RequestBodyExample =>
+  pipe(
+    schemaObject.properties,
+    O.fromNullable,
+    O.map(
+      (properties) =>
+        Object.entries(properties) as [string, OpenAPIV31.SchemaObject][]
+    ),
+    O.getOrElseW(() => [] as [string, OpenAPIV31.SchemaObject][]),
+    A.reduce(
+      {} as { [name: string]: RequestBodyExample },
+      (aggregatedExample, property) => {
+        aggregatedExample[property[0]] =
+          generateRequestBodyExampleFromSchemaObject(property[1])
+        return aggregatedExample
+      }
+    )
+  )
+
+// Use carefully, the schema type should necessarily be mixed array
+const generateMixedArrayRequestBodyEcample = (
+  schemaObject: OpenAPIV31.SchemaObject
+): RequestBodyExample =>
+  pipe(
+    schemaObject,
+    (schemaObject) => schemaObject.type as MixedArraySchemaType,
+    A.reduce([] as Array<RequestBodyExample>, (aggregatedExample, itemType) => {
+      // TODO: Figure out how to include non-primitive types as well
+      if (isSchemaTypePrimitive(itemType)) {
+        aggregatedExample.push(getPrimitiveTypePlaceholder(itemType))
+      }
+      return aggregatedExample
+    })
+  )
+
+const generateArrayRequestBodyExample = (
+  schemaObject: OpenAPIV31.ArraySchemaObject
+): RequestBodyExample => [
+  generateRequestBodyExampleFromSchemaObject(
+    schemaObject.items as OpenAPIV31.SchemaObject
+  ),
+]
+
+const generateRequestBodyExampleFromSchemaObject = (
+  schemaObject: OpenAPIV31.SchemaObject
+): RequestBodyExample => {
+  // TODO: Handle schema objects with oneof or anyof
+  if (schemaObject.example) return schemaObject.example as RequestBodyExample
+  if (schemaObject.examples)
+    return schemaObject.examples[0] as RequestBodyExample
+  if (!schemaObject.type) return ""
+  if (isSchemaTypePrimitive(schemaObject.type))
+    return generatePrimitiveRequestBodyExample(
+      schemaObject as OpenAPIV31.NonArraySchemaObject
+    )
+  if (schemaObject.type === "object")
+    return generateObjectRequestBodyExample(schemaObject)
+  if (schemaObject.type === "array")
+    return generateArrayRequestBodyExample(schemaObject)
+  return generateMixedArrayRequestBodyEcample(schemaObject)
+}
+
+export const generateRequestBodyExampleFromMediaObject = (
+  mediaObject: OpenAPIV31.MediaTypeObject
+): RequestBodyExample => {
+  if (mediaObject.example) return mediaObject.example as RequestBodyExample
+  if (mediaObject.examples) return mediaObject.examples[0] as RequestBodyExample
+  return mediaObject.schema
+    ? generateRequestBodyExampleFromSchemaObject(mediaObject.schema)
+    : ""
+}

packages/hoppscotch-app/helpers/import-export/import/openapi/index.ts

@@ -24,8 +24,12 @@ import * as S from "fp-ts/string"
 import * as O from "fp-ts/Option"
 import * as TE from "fp-ts/TaskEither"
 import * as RA from "fp-ts/ReadonlyArray"
-import { step } from "../steps"
-import { defineImporter, IMPORTER_INVALID_FILE_FORMAT } from "."
+import { step } from "../../steps"
+import { defineImporter, IMPORTER_INVALID_FILE_FORMAT } from "../"
+import { generateRequestBodyExampleFromMediaObject as generateExampleV31 } from "./exampleV31"
+import { generateRequestBodyExampleFromMediaObject as generateExampleV3 } from "./exampleV3"
+import { generateRequestBodyExampleFromOpenAPIV2Body } from "./exampleV2"
+import { prettyPrintJSON } from "~/helpers/functional/json"
 
 export const OPENAPI_DEREF_ERROR = "openapi/deref_error" as const
 
@@ -114,8 +118,12 @@ const parseOpenAPIV2Body = (op: OpenAPIV2.OperationObject): HoppRESTReqBody => {
   if (
     obj !== "multipart/form-data" &&
     obj !== "application/x-www-form-urlencoded"
-  )
-    return { contentType: obj as any, body: "" }
+  ) {
+    return {
+      contentType: obj as any,
+      body: generateRequestBodyExampleFromOpenAPIV2Body(op),
+    }
+  }
 
   const formDataValues = pipe(
     (op.parameters ?? []) as OpenAPIV2.Parameter[],
@@ -178,7 +186,8 @@ const parseOpenAPIV3BodyFormData = (
 }
 
 const parseOpenAPIV3Body = (
-  op: OpenAPIV3.OperationObject | OpenAPIV31.OperationObject
+  op: OpenAPIV3.OperationObject | OpenAPIV31.OperationObject,
+  isV31Request: boolean
 ): HoppRESTReqBody => {
   const objs = Object.entries(
     (
@@ -197,11 +206,20 @@ const parseOpenAPIV3Body = (
     OpenAPIV3.MediaTypeObject | OpenAPIV31.MediaTypeObject
   ] = objs[0]
 
+  const exampleBody = pipe(
+    prettyPrintJSON(
+      isV31Request
+        ? generateExampleV31(media as OpenAPIV31.MediaTypeObject)
+        : generateExampleV3(media as OpenAPIV3.MediaTypeObject)
+    ),
+    O.getOrElse(() => "")
+  )
+
   return contentType in knownContentTypes
     ? contentType === "multipart/form-data" ||
       contentType === "application/x-www-form-urlencoded"
       ? parseOpenAPIV3BodyFormData(contentType, media)
-      : { contentType: contentType as any, body: "" }
+      : { contentType: contentType as any, body: exampleBody }
     : { contentType: null, body: null }
 }
 
@@ -213,12 +231,20 @@ const isOpenAPIV3Operation = (
   typeof doc.openapi === "string" &&
   doc.openapi.startsWith("3.")
 
+const isOpenAPIV31Operation = (
+  doc: OpenAPI.Document,
+  op: OpenAPIOperationType
+): op is OpenAPIV31.OperationObject =>
+  objectHasProperty(doc, "openapi") &&
+  typeof doc.openapi === "string" &&
+  doc.openapi.startsWith("3.1")
+
 const parseOpenAPIBody = (
   doc: OpenAPI.Document,
   op: OpenAPIOperationType
 ): HoppRESTReqBody =>
   isOpenAPIV3Operation(doc, op)
-    ? parseOpenAPIV3Body(op)
+    ? parseOpenAPIV3Body(op, isOpenAPIV31Operation(doc, op))
     : parseOpenAPIV2Body(op)
 
 const resolveOpenAPIV3SecurityObj = (