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import path from 'node:path'
import {existsSync, readFileSync, writeFileSync} from 'node:fs'
const typedefPath = path.join(import.meta.dirname, '../../target/doc/foxfleet_applib.json')
const outputPath = path.join(import.meta.dirname, '../bindings/index.ts')
if (!existsSync(typedefPath)) {
console.error(`Could not find rustdoc type definitions`)
process.exit(1)
}
const commandPrefix = '::foxfleet_applib::commands'
const {root, index} = JSON.parse(readFileSync(typedefPath))
function traverseModuleForFunctions(startIndex, namespace = '') {
const node = index[startIndex]
if (!node) return []
// If it's a module
if (node.inner?.module) {
const childItems = node.inner.module.items
return childItems.map(childIndex => traverseModuleForFunctions(childIndex, namespace + '::' + node.name))
}
// If it's a function
if (node.inner?.function) {
return {...node, namespace}
}
return []
}
function getParameters(functionDef) {
let params = []
const skipped = ['tauri::State', 'tauri::AppHandle']
for (const [name, typedef] of functionDef.inner.function.sig.inputs) {
const typeName = typedef.resolved_path?.name
if (skipped.includes(typeName)) continue
const type = typedef.resolved_path ? convertType(typedef.resolved_path) : convertType(typedef.borrowed_ref)
params.push({name, type})
}
return params
}
function getReturnType(functionDef) {
if (functionDef.inner.function.sig.output.resolved_path.name === "Result")
return convertType(functionDef.inner.function.sig.output.resolved_path.args.angle_bracketed.args[0].type.resolved_path)
return convertType(functionDef.inner.function.sig.output.resolved_path)
}
let imports = []
function convertType(typeDef) {
if (typeof typeDef === 'undefined') return undefined
const {name, id, args: {angle_bracketed: {args = []} = {}} = {}} = typeDef
if(args.length && name !== 'Vec') throw new Error(`Unknown generic type ${name}`)
if(name === 'Vec' && !args) throw new Errror(`Unknown inner type for vec`)
if(name === 'Vec') return convertType(args[0].type.resolved_path) + '[]'
if(name === 'Result') return `Promise<${convertType(args[0].type.resolved_path)}>`
if(name === 'String' || typeDef?.type?.primitive === 'str') return 'string'
// Otherwise look up the definition and make sure it has the ![derive(TS)]
const def = index[id]
if (!def.attrs || !def.attrs.includes('#[ts(export)]')) {
throw new Error(`Complex type ${name} does not have Typescript definitions exported`)
}
imports.push(name)
return name
}
function convertCamelCase(name) {
return name.replace(/_([a-z])/g, (_, letter) => letter.toUpperCase())
}
function convertUpperCamelCase(name) {
return name.replace(/(_|^)([a-z])/g, (_, _first, letter) => letter.toUpperCase())
}
const publicFunctions = traverseModuleForFunctions(root).flat(Infinity)
const commandFunctions = publicFunctions
.filter(({namespace}) => namespace.startsWith(commandPrefix))
.map(({namespace, ...rest}) => ({...rest, namespace: namespace.replace(commandPrefix + '::', '')}))
const namespaces = {}
for(const func of commandFunctions) {
if(!namespaces[func.namespace])
namespaces[func.namespace] = []
namespaces[func.namespace].push(func)
}
const invokeLine = `import { invoke } from '@tauri-apps/api/core';`
const namespaceBlocks = Object.keys(namespaces).map(namespace => {
const functions = namespaces[namespace]
const functionBlocks = functions.map(func => {
const params = getParameters(func)
const parametersString = params.map(({name, type}) => `${name}: ${type}`).join(', ')
let returnTypeString = getReturnType(func)
if (!/^Promise<.*>$/.test(returnTypeString))
returnTypeString = `Promise<${returnTypeString}>`
return `
export async function ${convertCamelCase(func.name)}(${parametersString}): ${returnTypeString} {
return await invoke('${func.name}', {${params.map(param => convertCamelCase(param.name) + ': ' + param.name).join(', ')}}) as any as ${returnTypeString}
}`
})
return `export namespace ${convertUpperCamelCase(namespace)} {\n${functionBlocks.join('\n')}\n}`
})
// This needs to be last so it gets populated by the above calls
const importLines = imports.map(type => `import type {${type}} from './${type}.ts'`)
const fileData = `
${invokeLine}
${importLines}
${namespaceBlocks.join('\n\n')}
`
writeFileSync(outputPath, fileData)
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