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feat: add decorateBaseSchema function to modify dynamic schema
Combine 4 in 1 feat: add decorateBaseSchema function fix: add tokenJSONpath: '$.token', feat: add decorateBaseSchema function fix: add tokenJSONpath: '$.token', feat: add decorateBaseSchema function
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MARCO MANCO s281564
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May 1, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| const { gql } = require('apollo-server-core'); | ||
| const { extendSchema } = require('graphql/utilities'); | ||
| const { addResolversToSchema } = require('@graphql-tools/schema'); | ||
|
|
||
| /** | ||
| * | ||
| * @param {*} targetQuery : Query wrapped int the extended object Type | ||
| * @param {*} extendedType : Object type that should be extended | ||
| * @param {*} argsNeeded : Optional arguments extracted from the father and passed from the wrapper | ||
| * @param {*} baseSchema : GraphQL Schema where the type and query are written | ||
| * @param {*} nameWrapper : Optional custom name for the wrapper | ||
| * @returns | ||
| */ | ||
|
|
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| function capitalizeType(name) { | ||
| return name[0].toUpperCase() + name.slice(1); | ||
| } | ||
|
|
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| module.exports = { | ||
| decorateBaseSchema: function ( | ||
| targetQuery, | ||
| extendedType, | ||
| argsNeeded, | ||
| nameWrapper, | ||
| baseSchema | ||
| ) { | ||
| if (!targetQuery) return baseSchema; | ||
| if (!extendedType) return baseSchema; | ||
| const targetType = baseSchema.getQueryType().getFields()[targetQuery]; | ||
| if (!targetType) return baseSchema; | ||
|
|
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| nameWrapper = nameWrapper ? nameWrapper : 'fieldWrapper'; | ||
| let typeWrapper = capitalizeType(nameWrapper); | ||
| let typeTargetQuery = capitalizeType(targetQuery); | ||
| const extension = gql` | ||
| extend type ${extendedType} { | ||
| ${nameWrapper}: ${typeWrapper} | ||
| } | ||
| type ${typeWrapper} { | ||
| ${targetQuery}: ${typeTargetQuery} | ||
| } | ||
| `; | ||
| const resolvers = { | ||
| [extendedType]: { | ||
| [nameWrapper]: (parent, args, context, info) => { | ||
| let newParent = {}; | ||
| for (e of argsNeeded) { | ||
| newParent[e] = parent[e]; | ||
| } | ||
| return newParent !== {} ? newParent : parent; // gestire errori | ||
| }, | ||
| }, | ||
| [typeWrapper]: { | ||
| [targetQuery]: (parent, args, context, info) => { | ||
| return targetType.resolve(parent, parent, context, info); | ||
| }, | ||
| }, | ||
| }; | ||
|
|
||
| // extending the schema | ||
| const extendedSchema = extendSchema(baseSchema, extension); | ||
| const newSchema = addResolversToSchema(extendedSchema, resolvers); | ||
| return newSchema; | ||
| }, | ||
| }; |
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