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// Return attributes and values of a node in a convenient way:
/* example:
<ExampleElement attr1="15" attr2>
{ attr1: {
hasValue: true,
value: 15
},
attr2: {
hasValue: false
}
Inclusion of hasValue is in case an eslint rule cares about boolean values
explicitly assigned to attribute vs the attribute being used as a flag
*/
export default class NodeAttributes {
attributes: Record<
string,
| {
hasValue?: false
}
| {
hasValue: true
value: any
}
>
constructor(ASTnode) {
this.attributes = {}
ASTnode.attributes.forEach((attribute) => {
if (!attribute.type || attribute.type !== 'JSXAttribute') {
return
}
if (!!attribute.value) {
// hasValue
const value =
typeof attribute.value.value === 'string'
? attribute.value.value
: typeof attribute.value.expression.value !== 'undefined'
? attribute.value.expression.value
: attribute.value.expression.properties
this.attributes[attribute.name.name] = {
hasValue: true,
value,
}
} else {
this.attributes[attribute.name.name] = {
hasValue: false,
}
}
})
}
hasAny() {
return !!Object.keys(this.attributes).length
}
has(attrName: string) {
return !!this.attributes[attrName]
}
hasValue(attrName: string) {
return !!this.attributes[attrName].hasValue
}
value(attrName: string) {
const attr = this.attributes[attrName]
if (!attr) {
return true
}
if (attr.hasValue) {
return attr.value
}
return undefined
}
}
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