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import type { ScriptCompileContext } from './context'
import { inferRuntimeType } from './resolveType'
import { UNKNOWN_TYPE, isCallOf, toRuntimeTypeString } from './utils'
import { BindingTypes, unwrapTSNode } from '@vue/compiler-dom'
export const DEFINE_MODEL = 'defineModel'
export interface ModelDecl {
type: TSType | undefined
options: string | undefined
identifier: string | undefined
runtimeOptionNodes: Node[]
}
export function processDefineModel(
ctx: ScriptCompileContext,
node: Node,
declId?: LVal,
): boolean {
if (!isCallOf(node, DEFINE_MODEL)) {
return false
}
ctx.hasDefineModelCall = true
const type =
(node.typeParameters && node.typeParameters.params[0]) || undefined
let modelName: string
let options: Node | undefined
const arg0 = node.arguments[0] && unwrapTSNode(node.arguments[0])
const hasName = arg0 && arg0.type === 'StringLiteral'
if (hasName) {
modelName = arg0.value
options = node.arguments[1]
} else {
modelName = 'modelValue'
options = arg0
}
if (ctx.modelDecls[modelName]) {
ctx.error(`duplicate model name ${JSON.stringify(modelName)}`, node)
}
let optionsString = options && ctx.getString(options)
let optionsRemoved = !options
const runtimeOptionNodes: Node[] = []
if (
options &&
options.type === 'ObjectExpression' &&
!options.properties.some(p => p.type === 'SpreadElement' || p.computed)
) {
let removed = 0
for (let i = options.properties.length - 1; i >= 0; i--) {
const p = options.properties[i]
const next = options.properties[i + 1]
const start = p.start!
const end = next ? next.start! : options.end! - 1
if (
(p.type === 'ObjectProperty' || p.type === 'ObjectMethod') &&
((p.key.type === 'Identifier' &&
(p.key.name === 'get' || p.key.name === 'set')) ||
(p.key.type === 'StringLiteral' &&
(p.key.value === 'get' || p.key.value === 'set')))
) {
// remove runtime-only options from prop options to avoid duplicates
optionsString =
optionsString.slice(0, start - options.start!) +
optionsString.slice(end - options.start!)
} else {
// remove prop options from runtime options
removed++
ctx.s.remove(ctx.startOffset! + start, ctx.startOffset! + end)
// record prop options for invalid scope var reference check
runtimeOptionNodes.push(p)
}
}
if (removed === options.properties.length) {
optionsRemoved = true
ctx.s.remove(
ctx.startOffset! + (hasName ? arg0.end! : options.start!),
ctx.startOffset! + options.end!,
)
}
}
ctx.modelDecls[modelName] = {
type,
options: optionsString,
runtimeOptionNodes,
identifier:
declId && declId.type === 'Identifier' ? declId.name : undefined,
}
// register binding type
ctx.bindingMetadata[modelName] = BindingTypes.PROPS
// defineModel -> useModel
ctx.s.overwrite(
ctx.startOffset! + node.callee.start!,
ctx.startOffset! + node.callee.end!,
ctx.helper('useModel'),
)
// inject arguments
ctx.s.appendLeft(
ctx.startOffset! +
(node.arguments.length ? node.arguments[0].start! : node.end! - 1),
`__props, ` +
(hasName
? ``
: `${JSON.stringify(modelName)}${optionsRemoved ? `` : `, `}`),
)
return true
}
export function genModelProps(ctx: ScriptCompileContext) {
if (!ctx.hasDefineModelCall) return
const isProd = !!ctx.options.isProd
let modelPropsDecl = ''
for (const [name, { type, options: runtimeOptions }] of Object.entries(
ctx.modelDecls,
)) {
let skipCheck = false
let codegenOptions = ``
let runtimeTypes = type && inferRuntimeType(ctx, type)
if (runtimeTypes) {
const hasBoolean = runtimeTypes.includes('Boolean')
const hasFunction = runtimeTypes.includes('Function')
const hasUnknownType = runtimeTypes.includes(UNKNOWN_TYPE)
if (hasUnknownType) {
if (hasBoolean || hasFunction) {
runtimeTypes = runtimeTypes.filter(t => t !== UNKNOWN_TYPE)
skipCheck = true
} else {
runtimeTypes = ['null']
}
}
if (!isProd) {
codegenOptions =
`type: ${toRuntimeTypeString(runtimeTypes)}` +
(skipCheck ? ', skipCheck: true' : '')
} else if (hasBoolean || (runtimeOptions && hasFunction)) {
// preserve types if contains boolean, or
// function w/ runtime options that may contain default
codegenOptions = `type: ${toRuntimeTypeString(runtimeTypes)}`
} else {
// able to drop types in production
}
}
let decl: string
if (codegenOptions && runtimeOptions) {
decl = ctx.isTS
? `{ ${codegenOptions}, ...${runtimeOptions} }`
: `Object.assign({ ${codegenOptions} }, ${runtimeOptions})`
} else if (codegenOptions) {
decl = `{ ${codegenOptions} }`
} else if (runtimeOptions) {
decl = runtimeOptions
} else {
decl = `{}`
}
modelPropsDecl += `\n ${JSON.stringify(name)}: ${decl},`
// also generate modifiers prop
const modifierPropName = JSON.stringify(
name === 'modelValue' ? `modelModifiers` : `${name}Modifiers`,
)
modelPropsDecl += `\n ${modifierPropName}: {},`
}
return `{${modelPropsDecl}\n }`
}
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