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Rectify the typings of the project and add Readme.md
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Kundu
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Kundu
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
| dist | ||
| node_modules | ||
| transpiled | ||
| transpiled | ||
| worker |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,221 @@ | ||
| import * as GraphQL from 'graphql' | ||
| import { | ||
| DenormalizationResult, | ||
| FieldNodeWithSelectionSet, | ||
| Variables, | ||
| ResponseObject, | ||
| ResponseObject2, | ||
| ResponseObjectArray, | ||
| RootFields, | ||
| ResolveType, | ||
| } from './types' | ||
| import { | ||
| expandFragments, | ||
| getDocumentDefinitions, | ||
| fieldNameWithArguments, | ||
| shouldIncludeField, | ||
| defaultResolveType, | ||
| } from './functions' | ||
| import { NormKey } from './norm-map' | ||
| import { Cache } from 'cache' | ||
|
|
||
| type Mutable<T> = { -readonly [P in keyof T]: T[P] } // Remove readonly | ||
|
|
||
| type MutableResponseObject = Mutable<ResponseObject> | ||
| // eslint-disable-next-line functional/prefer-readonly-type | ||
| type MutableResponseObjectArray = Array<MutableResponseObject> | ||
| type ParentResponseObjectOrArray = | ||
| | Mutable<ResponseObject2> | ||
| | ResponseObjectArray | ||
| type ParentResponseKey = string | number | undefined | ||
| type StackWorkItem = readonly [ | ||
| FieldNodeWithSelectionSet, | ||
| NormKey | ReadonlyArray<NormKey>, | ||
| ParentResponseObjectOrArray, | ||
| ParentResponseKey, | ||
| NormKey, | ||
| string, | ||
| ] | ||
|
|
||
| /** | ||
| * Creates a graphql response by denormalizing. | ||
| * @param query The graphql query document | ||
| * @param variables The graphql query variables | ||
| * @param normMap The map of normalized objects | ||
| * @param resolveType Function get get typeName from an object | ||
| */ | ||
| export async function denormalize( | ||
| query: GraphQL.DocumentNode, | ||
| variables: Variables | undefined, | ||
| normMap: Cache, | ||
| resolveType: ResolveType = defaultResolveType, | ||
| ): Promise<DenormalizationResult> { | ||
| const [fragmentMap, rootFieldNode] = getDocumentDefinitions(query.definitions) | ||
|
|
||
| const stack: Array<StackWorkItem> = [] | ||
| const response = {} | ||
| const usedFieldsMap: { | ||
| // eslint-disable-next-line | ||
| [key: string]: Set<string> | ||
| } = {} | ||
| stack.push([ | ||
| rootFieldNode, | ||
| 'ROOT_QUERY', | ||
| response, | ||
| undefined, | ||
| 'ROOT_QUERY', | ||
| 'ROOT_QUERY', | ||
| ]) | ||
| while (stack.length > 0) { | ||
| const [ | ||
| fieldNode, | ||
| idOrIdArray, | ||
| parentObjectOrArray, | ||
| parentResponseKey, | ||
| parentNormKey, | ||
| fieldNameInParent, | ||
| ] = stack.pop()! | ||
|
|
||
| // The stack has work items, depending on the work item we have four different cases to handle: | ||
| // field + id + parentObject = denormalize(ID) => [responseObject, workitems] and parentObject[field] = responseObject | ||
| // field + id + parentArray = denormalize(ID) => [responseObject, workitems] and parentArray.push(responseObject) | ||
| // field + idArray + parentObject = stack.push(workItemsFrom(idArray)) and parentObject[field] = new Array() | ||
| // field + idArray + parentArray = stack.push(workItemsFrom(idArray)) and parentArray.push(new Array()) | ||
|
|
||
| let responseObjectOrNewParentArray: | ||
| | MutableResponseObject | ||
| | MutableResponseObjectArray | ||
| | null | ||
|
|
||
| if (idOrIdArray === null) { | ||
| responseObjectOrNewParentArray = null | ||
| } else if (!Array.isArray(idOrIdArray)) { | ||
| const key: NormKey = idOrIdArray as NormKey | ||
|
|
||
| const normObj = await normMap.get(key) | ||
|
|
||
| // Does not exist in normalized map. We can't fully resolve query | ||
| if (!normObj) { | ||
| return { | ||
| data: undefined, | ||
| fields: { [parentNormKey]: new Set([fieldNameInParent]) }, | ||
| } | ||
| } | ||
|
|
||
| let usedFields = usedFieldsMap[key] | ||
| if (usedFields === undefined) { | ||
| usedFields = new Set() | ||
| usedFieldsMap[key] = usedFields | ||
| } | ||
|
|
||
| // If we've been here before we need to use the previously created response object | ||
| if (Array.isArray(parentObjectOrArray)) { | ||
| responseObjectOrNewParentArray = | ||
| (parentObjectOrArray as MutableResponseObjectArray)[ | ||
| parentResponseKey as number | ||
| ] || Object.create(null) | ||
| } else { | ||
| responseObjectOrNewParentArray = | ||
| (parentObjectOrArray as MutableResponseObject)[ | ||
| parentResponseKey as string | ||
| ] || Object.create(null) | ||
| } | ||
|
|
||
| // Expand fragments and loop all fields | ||
| const expandedSelections = expandFragments( | ||
| resolveType, | ||
| normObj, | ||
| fieldNode.selectionSet.selections, | ||
| fragmentMap, | ||
| ) | ||
| for (const field of expandedSelections) { | ||
| // Check if this field should be skipped according to @skip and @include directives | ||
| const include = field.directives | ||
| ? shouldIncludeField(field.directives, variables) | ||
| : true | ||
| if (include) { | ||
| // Build key according to any arguments | ||
| const fieldName = | ||
| field.arguments && field.arguments.length > 0 | ||
| ? fieldNameWithArguments(field, variables) | ||
| : field.name.value | ||
| // Add this to used fields | ||
| usedFields.add(fieldName) | ||
| const normObjValue = normObj[fieldName] | ||
| if (normObjValue !== null && field.selectionSet) { | ||
| // Put a work-item on the stack to build this field and set it on the response object | ||
| stack.push([ | ||
| field as FieldNodeWithSelectionSet, | ||
| normObjValue as any, | ||
| responseObjectOrNewParentArray as | ||
| | MutableResponseObject | ||
| | MutableResponseObjectArray, | ||
| (field.alias && field.alias.value) || field.name.value, | ||
| key, | ||
| fieldName, | ||
| ]) | ||
| } else { | ||
| // This field is a primitive (not a array or object) | ||
| if (normObjValue !== undefined) { | ||
| ;(responseObjectOrNewParentArray as MutableResponseObject)[ | ||
| (field.alias && field.alias.value) || field.name.value | ||
| ] = normObjValue | ||
| } else { | ||
| return { | ||
| data: undefined, | ||
| fields: { [key]: new Set([fieldName]) }, | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } else { | ||
| const idArray: ReadonlyArray<NormKey> = idOrIdArray | ||
| responseObjectOrNewParentArray = | ||
| (parentObjectOrArray as MutableResponseObject)[ | ||
| parentResponseKey as string | ||
| ] || [] | ||
| for (let i = 0; i < idArray.length; i++) { | ||
| const idArrayItem = idArray[i] | ||
| stack.push([ | ||
| fieldNode, | ||
| idArrayItem, | ||
| responseObjectOrNewParentArray as | ||
| | MutableResponseObject | ||
| | MutableResponseObjectArray, | ||
| i, | ||
| parentNormKey, | ||
| fieldNameInParent, | ||
| ]) | ||
| } | ||
| } | ||
|
|
||
| // Add to the parent, either field or an array | ||
| if (Array.isArray(parentObjectOrArray)) { | ||
| const parentArray: MutableResponseObjectArray = parentObjectOrArray | ||
| parentArray[ | ||
| parentResponseKey as number | ||
| ] = responseObjectOrNewParentArray as | ||
| | MutableResponseObject | ||
| | MutableResponseObjectArray | ||
| } else { | ||
| const parentObject: MutableResponseObject = parentObjectOrArray | ||
| parentObject[ | ||
| parentResponseKey || | ||
| (fieldNode.alias && fieldNode.alias.value) || | ||
| fieldNode.name.value | ||
| ] = responseObjectOrNewParentArray | ||
| } | ||
| } | ||
|
|
||
| interface GraphQLResponse { | ||
| readonly data: RootFields | ||
| } | ||
|
|
||
| const data = (response as GraphQLResponse).data | ||
|
|
||
| return { | ||
| data: data, | ||
| fields: usedFieldsMap, | ||
| } | ||
| } |
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