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65 lines
3.0 KiB
Plaintext
65 lines
3.0 KiB
Plaintext
import { CreateType } from '../create/type.mjs';
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import { TemplateLiteral, TemplateLiteralParseExact, IsTemplateLiteralExpressionFinite, TemplateLiteralExpressionGenerate } from '../template-literal/index.mjs';
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import { IntrinsicFromMappedKey } from './intrinsic-from-mapped-key.mjs';
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import { Literal } from '../literal/index.mjs';
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import { Union } from '../union/index.mjs';
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// ------------------------------------------------------------------
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// TypeGuard
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// ------------------------------------------------------------------
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import { IsMappedKey, IsTemplateLiteral, IsUnion, IsLiteral } from '../guard/kind.mjs';
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// ------------------------------------------------------------------
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// Apply
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// ------------------------------------------------------------------
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function ApplyUncapitalize(value) {
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const [first, rest] = [value.slice(0, 1), value.slice(1)];
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return [first.toLowerCase(), rest].join('');
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}
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function ApplyCapitalize(value) {
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const [first, rest] = [value.slice(0, 1), value.slice(1)];
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return [first.toUpperCase(), rest].join('');
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}
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function ApplyUppercase(value) {
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return value.toUpperCase();
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}
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function ApplyLowercase(value) {
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return value.toLowerCase();
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}
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function FromTemplateLiteral(schema, mode, options) {
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// note: template literals require special runtime handling as they are encoded in string patterns.
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// This diverges from the mapped type which would otherwise map on the template literal kind.
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const expression = TemplateLiteralParseExact(schema.pattern);
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const finite = IsTemplateLiteralExpressionFinite(expression);
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if (!finite)
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return { ...schema, pattern: FromLiteralValue(schema.pattern, mode) };
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const strings = [...TemplateLiteralExpressionGenerate(expression)];
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const literals = strings.map((value) => Literal(value));
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const mapped = FromRest(literals, mode);
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const union = Union(mapped);
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return TemplateLiteral([union], options);
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}
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// prettier-ignore
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function FromLiteralValue(value, mode) {
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return (typeof value === 'string' ? (mode === 'Uncapitalize' ? ApplyUncapitalize(value) :
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mode === 'Capitalize' ? ApplyCapitalize(value) :
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mode === 'Uppercase' ? ApplyUppercase(value) :
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mode === 'Lowercase' ? ApplyLowercase(value) :
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value) : value.toString());
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}
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// prettier-ignore
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function FromRest(T, M) {
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return T.map(L => Intrinsic(L, M));
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}
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/** Applies an intrinsic string manipulation to the given type. */
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export function Intrinsic(schema, mode, options = {}) {
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// prettier-ignore
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return (
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// Intrinsic-Mapped-Inference
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IsMappedKey(schema) ? IntrinsicFromMappedKey(schema, mode, options) :
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// Standard-Inference
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IsTemplateLiteral(schema) ? FromTemplateLiteral(schema, mode, options) :
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IsUnion(schema) ? Union(FromRest(schema.anyOf, mode), options) :
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IsLiteral(schema) ? Literal(FromLiteralValue(schema.const, mode), options) :
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// Default Type
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CreateType(schema, options));
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}
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