refactor(tpc): write only declaration files (#151)

package.json

@@ -59,8 +59,8 @@
       "third-party-capital",
       "knitwork",
       "estree-walker",
-      "#build/nuxt-scripts/tpc/google-tag-manager",
-      "#build/nuxt-scripts/tpc/google-analytics",
+      "#build/modules/nuxt-scripts-gtm",
+      "#build/modules/nuxt-scripts-ga",
       "@vimeo/player",
       "esbuild"
     ]

src/module.ts

@@ -25,10 +25,9 @@ import type {
   RegistryScript,
   RegistryScripts,
 } from './runtime/types'
-import addGoogleAnalyticsRegistry from './tpc/google-analytics'
-import addGoogleTagManagerRegistry from './tpc/google-tag-manager'
 import checkScripts from './plugins/check-scripts'
 import { templatePlugin } from './templates'
+import { addTpc } from './tpc/addTpc'
 
 export interface ModuleOptions {
   /**
@@ -140,10 +139,7 @@ export default defineNuxtModule<ModuleOptions>({
     })
 
     const scripts = registry(resolve)
-
-    addGoogleAnalyticsRegistry(scripts)
-    addGoogleTagManagerRegistry(scripts)
-
+    addTpc(scripts)
     nuxt.hooks.hook('modules:done', async () => {
       const registryScripts = [...scripts]
 

src/runtime/types.ts

@@ -22,8 +22,8 @@ import type { LemonSqueezyInput } from './registry/lemon-squeezy'
 import type { GoogleAdsenseInput } from './registry/google-adsense'
 import type { ClarityInput } from './registry/clarity'
 import type { CrispInput } from './registry/crisp'
-import type { Input as GoogleTagManagerInput } from '#build/nuxt-scripts/tpc/google-tag-manager'
-import type { Input as GoogleAnalyticsInput } from '#build/nuxt-scripts/tpc/google-analytics'
+import type { Input as GoogleTagManagerInput } from '#build/modules/nuxt-scripts-gtm'
+import type { Input as GoogleAnalyticsInput } from '#build/modules/nuxt-scripts-ga'
 
 export type NuxtUseScriptOptions<T = any> = Omit<UseScriptOptions<T>, 'trigger'> & {
   /**

src/tpc/addTpc.ts

@@ -0,0 +1,111 @@
+import { GooglaAnalyticsData, GoogleAnalytics, GoogleTagManager, GoogleTagManagerData, type Output } from 'third-party-capital'
+import { addImports, addTemplate, useNuxt } from '@nuxt/kit'
+import type { RegistryScript } from '../runtime/types'
+import { extendTypes } from '../kit'
+import { generateTpcContent, generateTpcTypes, type ScriptContentOpts } from './utils'
+
+interface TpcDescriptor {
+  input: ScriptContentOpts
+  filename: string
+  registry: RegistryScript
+}
+
+const scripts: TpcDescriptor[] = [{
+  input: {
+    data: GoogleTagManagerData as Output,
+    scriptFunctionName: 'useScriptGoogleTagManager',
+    use: () => {
+      return { dataLayer: window.dataLayer, google_tag_manager: window.google_tag_manager }
+    },
+    stub: ({ fn }) => {
+      return fn === 'dataLayer' ? [] : undefined
+    },
+    tpcKey: 'gtm',
+    tpcTypeImport: 'GoogleTagManagerApi',
+    featureDetectionName: 'nuxt-third-parties-gtm',
+  },
+  filename: 'nuxt-scripts-gtm',
+  registry: {
+    label: 'Google Tag Manager',
+    category: 'tracking',
+    logo: `<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 256 256"><path fill="#8AB4F8" d="m150.262 245.516l-44.437-43.331l95.433-97.454l46.007 45.091z"/><path fill="#4285F4" d="M150.45 53.938L106.176 8.731L9.36 104.629c-12.48 12.48-12.48 32.713 0 45.207l95.36 95.986l45.09-42.182l-72.654-76.407z"/><path fill="#8AB4F8" d="m246.625 105.37l-96-96c-12.494-12.494-32.756-12.494-45.25 0c-12.495 12.495-12.495 32.757 0 45.252l96 96c12.494 12.494 32.756 12.494 45.25 0c12.495-12.495 12.495-32.757 0-45.251"/><circle cx="127.265" cy="224.731" r="31.273" fill="#246FDB"/></svg>`,
+    scriptBundling(options) {
+      const data = GoogleTagManager(options)
+      const mainScript = data.scripts?.find(({ key }) => key === 'gtag')
+
+      if (mainScript && 'url' in mainScript && mainScript.url)
+        return mainScript.url
+
+      return false
+    },
+  },
+}, {
+  input: {
+    data: GooglaAnalyticsData as Output,
+    scriptFunctionName: 'useScriptGoogleAnalytics',
+    use: () => {
+      return { dataLayer: window.dataLayer, gtag: window.gtag }
+    },
+    // allow dataLayer to be accessed on the server
+    stub: ({ fn }) => {
+      return fn === 'dataLayer' ? [] : undefined
+    },
+    tpcKey: 'gtag',
+    tpcTypeImport: 'GoogleAnalyticsApi',
+    featureDetectionName: 'nuxt-third-parties-ga',
+  },
+  filename: 'nuxt-scripts-ga',
+  registry: {
+    label: 'Google Analytics',
+    category: 'tracking',
+    logo: `<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 256 256"><path fill="#8AB4F8" d="m150.262 245.516l-44.437-43.331l95.433-97.454l46.007 45.091z"/><path fill="#4285F4" d="M150.45 53.938L106.176 8.731L9.36 104.629c-12.48 12.48-12.48 32.713 0 45.207l95.36 95.986l45.09-42.182l-72.654-76.407z"/><path fill="#8AB4F8" d="m246.625 105.37l-96-96c-12.494-12.494-32.756-12.494-45.25 0c-12.495 12.495-12.495 32.757 0 45.252l96 96c12.494 12.494 32.756 12.494 45.25 0c12.495-12.495 12.495-32.757 0-45.251"/><circle cx="127.265" cy="224.731" r="31.273" fill="#246FDB"/></svg>`,
+    scriptBundling(options) {
+      const data = GoogleAnalytics(options)
+      const mainScript = data.scripts?.find(({ key }) => key === 'gtag')
+
+      if (mainScript && 'url' in mainScript && mainScript.url)
+        return mainScript.url
+
+      return false
+    },
+  },
+}]
+
+export function addTpc(registry: RegistryScript[]) {
+  const nuxt = useNuxt()
+  const fileImport = new Map<string, string>()
+
+  for (const script of scripts) {
+    extendTypes(script.filename, async () => await generateTpcTypes(script.input))
+
+    const { dst } = addTemplate({
+      getContents() {
+        return generateTpcContent(script.input)
+      },
+      filename: `modules/${script.filename}.ts`,
+    })
+
+    addImports({
+      from: dst,
+      name: 'useScriptGoogleAnalytics',
+    })
+
+    script.registry.import = {
+      from: dst,
+      name: script.input.scriptFunctionName,
+    }
+
+    fileImport.set(script.filename, script.input.scriptFunctionName)
+
+    registry.push(script.registry)
+  }
+
+  nuxt.hook('prepare:types', async ({ declarations }) => {
+    declarations.push(`
+${Array.from(fileImport).map(([filename, fn]) => `import { ${fn} } from '#build/modules/${filename}'`).join('\n')}
+declare module '#imports' {
+${Array.from(fileImport).map(([_, fn]) => `  export { ${fn} }`).join('\n')}
+}    
+    `)
+  })
+}

src/tpc/utils.ts

@@ -4,11 +4,13 @@ import { useNuxt } from '@nuxt/kit'
 import type { HeadEntryOptions } from '@unhead/vue'
 import { resolvePath } from 'mlly'
 
-export interface ScriptContentOpts {
+export interface BaseOpts {
   data: Output
   scriptFunctionName: string
   tpcTypeImport: string
   tpcKey: string
+}
+export interface ScriptContentOpts extends BaseOpts {
   /**
    * This will be stringified. The function must be pure.
    */
@@ -23,7 +25,50 @@ export interface ScriptContentOpts {
 const HEAD_VAR = '__head'
 const INJECTHEAD_CODE = `const ${HEAD_VAR} =  injectHead()`
 
-export async function getTpcScriptContent(input: ScriptContentOpts) {
+export async function generateTpcTypes(input: BaseOpts) {
+  const mainScript = input.data.scripts?.find(({ key }) => key === input.tpcKey) as ExternalScript
+
+  if (!mainScript)
+    throw new Error(`no main script found for ${input.tpcKey} in third-party-capital`)
+
+  const imports = new Set<string>([
+    'import type { RegistryScriptInput } from \'#nuxt-scripts\'',
+    'import type { VueScriptInstance } from \'@unhead/vue\'',
+  ])
+
+  imports.add(genImport('#nuxt-scripts-validator', ['object', 'any']))
+
+  const chunks: string[] = []
+
+  if (input.tpcTypeImport) {
+    // TPC type import
+    imports.add(genTypeImport(await resolvePath('third-party-capital', {
+      url: import.meta.url,
+    }), [input.tpcTypeImport]))
+
+    chunks.push(`
+    declare global {
+      interface Window extends ${input.tpcTypeImport} {}
+    }`)
+  }
+
+  const hasParams = mainScript.params?.length
+
+  if (hasParams) {
+    imports.add(genTypeImport('#nuxt-scripts-validator', ['ObjectSchema', 'AnySchema']))
+  }
+  // need schema validation from tpc
+  chunks.push(`export type Schema = ObjectSchema<{${mainScript.params?.map(p => `${p}:  AnySchema`)}}, undefined>`)
+  chunks.push(`export type Input = RegistryScriptInput<Schema>`)
+  chunks.push(`export function ${input.scriptFunctionName}<T extends ${input.tpcTypeImport}>(_options?: Input): T & {$script: Promise<T> & VueScriptInstance<T>;}`)
+
+  return `
+${Array.from(imports).join('\n')}
+${chunks.join('\n')}
+  `
+}
+
+export async function generateTpcContent(input: ScriptContentOpts) {
   const nuxt = useNuxt()
   if (!input.data.scripts)
     throw new Error('input.data has no scripts !')