feat: add --namespace CLI option (#22)

Add `--namespace N, -n Wrap types in namespace (disabled by default)` option that will wrap the generated types in a namespace 

---
Example: 

`$ npx contentful-typescript-codegen --output ./contentful.d.ts -n Codegen`

```ts
declare namespace Codegen {
...
}

export as namespace Codegen
export = Codegen
```

src/contentful-typescript-codegen.ts

@@ -14,6 +14,7 @@ const cli = meow(
     --output,      -o  Where to write to
     --poll,        -p  Continuously refresh types
     --interval N,  -i  The interval in seconds at which to poll (defaults to 15)
+    --namespace N, -n  Wrap types in namespace N (disabled by default)
     --fields-only      Output a tree that _only_ ensures fields are valid
                        and present, and does not provide types for Sys,
                        Assets, or Rich Text. This is useful for ensuring raw
@@ -44,6 +45,11 @@ const cli = meow(
         alias: "i",
         required: false,
       },
+      namespace: {
+        type: "string",
+        alias: "n",
+        required: false,
+      },
       localization: {
         type: "boolean",
         alias: "l",
@@ -63,10 +69,11 @@ async function runCodegen(outputFile: string) {
 
   let output
   if (cli.flags.fieldsOnly) {
-    output = await renderFieldsOnly(contentTypes.items)
+    output = await renderFieldsOnly(contentTypes.items, { namespace: cli.flags.namespace })
   } else {
     output = await render(contentTypes.items, locales.items, {
       localization: cli.flags.localization,
+      namespace: cli.flags.namespace,
     })
   }
 

src/renderers/contentful/renderNamespace.ts

@@ -0,0 +1,12 @@
+export default function renderNamespace(source: string, namespace: string | undefined) {
+  if (!namespace) return source
+
+  return `
+    declare namespace ${namespace} {
+    ${source}
+    }
+
+    export as namespace ${namespace}
+    export=${namespace}
+  `
+}

src/renderers/render.ts

@@ -7,21 +7,23 @@ import renderContentType from "./contentful/renderContentType"
 import renderUnion from "./typescript/renderUnion"
 import renderAllLocales from "./contentful/renderAllLocales"
 import renderDefaultLocale from "./contentful/renderDefaultLocale"
+import renderNamespace from "./contentful/renderNamespace"
 import renderLocalizedTypes from "./contentful/renderLocalizedTypes"
 
 interface Options {
   localization?: boolean
+  namespace?: string
 }
 
 export default async function render(
   contentTypes: ContentType[],
   locales: Locale[],
-  { localization = false }: Options = {},
+  { namespace, localization = false }: Options = {},
 ) {
   const sortedContentTypes = contentTypes.sort((a, b) => a.sys.id.localeCompare(b.sys.id))
   const sortedLocales = locales.sort((a, b) => a.code.localeCompare(b.code))
 
-  const source = [
+  const typingsSource = [
     renderContentfulImports(localization),
     renderAllContentTypes(sortedContentTypes, localization),
     renderAllContentTypeIds(sortedContentTypes),
@@ -30,6 +32,8 @@ export default async function render(
     renderLocalizedTypes(localization),
   ].join("\n\n")
 
+  const source = [renderContentfulImports(), renderNamespace(typingsSource, namespace)].join("\n\n")
+
   const prettierConfig = await resolveConfig(process.cwd())
   return format(source, { ...prettierConfig, parser: "typescript" })
 }

src/renderers/renderFieldsOnly.ts

@@ -3,11 +3,20 @@ import { ContentType } from "contentful"
 import { format, resolveConfig } from "prettier"
 
 import renderContentType from "./contentful-fields-only/renderContentType"
+import renderNamespace from "./contentful/renderNamespace"
 
-export default async function renderFieldsOnly(contentTypes: ContentType[]) {
+interface Options {
+  namespace?: string
+}
+
+export default async function renderFieldsOnly(
+  contentTypes: ContentType[],
+  { namespace }: Options = {},
+) {
   const sortedContentTypes = contentTypes.sort((a, b) => a.sys.id.localeCompare(b.sys.id))
 
-  const source = renderAllContentTypes(sortedContentTypes)
+  const typingsSource = renderAllContentTypes(sortedContentTypes)
+  const source = [renderNamespace(typingsSource, namespace)].join("\n\n")
 
   const prettierConfig = await resolveConfig(process.cwd())
 

test/renderers/render.test.ts

@@ -58,6 +58,11 @@ describe("render()", () => {
       import { Asset, Entry } from \\"contentful\\"
       import { Document } from \\"@contentful/rich-text-types\\"
 
+      // THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY IT.
+
+      import { Asset, Entry } from \\"contentful\\"
+      import { Document } from \\"@contentful/rich-text-types\\"
+
       export interface IMyContentTypeFields {
         /** Array field */
         arrayField: (\\"one\\" | \\"of\\" | \\"the\\" | \\"above\\")[]
@@ -125,6 +130,11 @@ describe("render()", () => {
     expect(await render(contentTypes, locales, { localization: true })).toMatchInlineSnapshot(`
       "// THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY IT.
 
+      import { Asset, Entry } from \\"contentful\\"
+      import { Document } from \\"@contentful/rich-text-types\\"
+
+      // THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY IT.
+
       import { Entry } from \\"contentful\\"
       import { Document } from \\"@contentful/rich-text-types\\"
 
@@ -182,4 +192,52 @@ describe("render()", () => {
       "
     `)
   })
+
+  it("renders given a content type inside a namespace", async () => {
+    expect(await render(contentTypes, locales, { namespace: "Codegen" })).toMatchInlineSnapshot(`
+      "// THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY IT.
+
+      import { Asset, Entry } from \\"contentful\\"
+      import { Document } from \\"@contentful/rich-text-types\\"
+
+      declare namespace Codegen {
+        // THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY IT.
+
+        import { Asset, Entry } from \\"contentful\\"
+        import { Document } from \\"@contentful/rich-text-types\\"
+
+        export interface IMyContentTypeFields {
+          /** Array field */
+          arrayField: (\\"one\\" | \\"of\\" | \\"the\\" | \\"above\\")[]
+        }
+
+        export interface IMyContentType extends Entry<IMyContentTypeFields> {
+          sys: {
+            id: string
+            type: string
+            createdAt: string
+            updatedAt: string
+            locale: string
+            contentType: {
+              sys: {
+                id: \\"myContentType\\"
+                linkType: \\"ContentType\\"
+                type: \\"Link\\"
+              }
+            }
+          }
+        }
+
+        export type CONTENT_TYPE = \\"myContentType\\"
+
+        export type LOCALE_CODE = \\"en-US\\" | \\"pt-BR\\"
+
+        export type CONTENTFUL_DEFAULT_LOCALE_CODE = \\"en-US\\"
+      }
+
+      export as namespace Codegen
+      export = Codegen
+      "
+    `)
+  })
 })

test/renderers/renderFieldsOnly.test.ts

@@ -2,47 +2,65 @@ import renderFieldsOnly from "../../src/renderers/renderFieldsOnly"
 import { ContentType, Sys } from "contentful"
 
 describe("renderFieldsOnly()", () => {
-  it("renders given a content type", async () => {
-    const contentTypes: ContentType[] = [
-      {
-        sys: {
-          id: "myContentType",
-        } as Sys,
-        fields: [
-          {
-            id: "arrayField",
-            name: "Array field",
-            required: true,
-            validations: [{}],
-            items: {
-              type: "Symbol",
-              validations: [
-                {
-                  in: ["one", "of", "the", "above"],
-                },
-              ],
-            },
-            disabled: false,
-            omitted: false,
-            localized: false,
-            type: "Array",
+  const contentTypes: ContentType[] = [
+    {
+      sys: {
+        id: "myContentType",
+      } as Sys,
+      fields: [
+        {
+          id: "arrayField",
+          name: "Array field",
+          required: true,
+          validations: [{}],
+          items: {
+            type: "Symbol",
+            validations: [
+              {
+                in: ["one", "of", "the", "above"],
+              },
+            ],
           },
-        ],
-        description: "",
-        displayField: "",
-        name: "",
-        toPlainObject: () => ({} as ContentType),
-      },
-    ]
+          disabled: false,
+          omitted: false,
+          localized: false,
+          type: "Array",
+        },
+      ],
+      description: "",
+      displayField: "",
+      name: "",
+      toPlainObject: () => ({} as ContentType),
+    },
+  ]
 
+  it("renders a given content type", async () => {
     expect(await renderFieldsOnly(contentTypes)).toMatchInlineSnapshot(`
-      "export interface IMyContentType {
-        fields: {
-          /** Array field */
-          arrayField: (\\"one\\" | \\"of\\" | \\"the\\" | \\"above\\")[]
+            "export interface IMyContentType {
+              fields: {
+                /** Array field */
+                arrayField: (\\"one\\" | \\"of\\" | \\"the\\" | \\"above\\")[]
+              }
+              [otherKeys: string]: any
+            }
+            "
+        `)
+  })
+
+  it("renders a given content type inside a namespace", async () => {
+    expect(await renderFieldsOnly(contentTypes, { namespace: "Codegen" })).toMatchInlineSnapshot(`
+      "declare namespace Codegen {
+        export interface IMyContentType {
+          fields: {
+            /** Array field */
+            arrayField: (\\"one\\" | \\"of\\" | \\"the\\" | \\"above\\")[]
+          }
+          [otherKeys: string]: any
         }
-        [otherKeys: string]: any
       }
+
+      export as namespace Codegen
+      export = Codegen
       "
     `)
   })