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refactor: separate route parsing utilities (#3236)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| /** | ||
| * segment parser, forked from the below: | ||
| * - original repository url: https://github.com/nuxt/nuxt | ||
| * - code url: https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/pages/utils.ts | ||
| * - author: Nuxt Framework Team | ||
| * - license: MIT | ||
| */ | ||
|
|
||
| import { encodePath } from 'ufo' | ||
|
|
||
| enum SegmentParserState { | ||
| initial, | ||
| static, | ||
| dynamic, | ||
| optional, | ||
| catchall, | ||
| group | ||
| } | ||
|
|
||
| enum SegmentTokenType { | ||
| static, | ||
| dynamic, | ||
| optional, | ||
| catchall, | ||
| group | ||
| } | ||
|
|
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| interface SegmentToken { | ||
| type: SegmentTokenType | ||
| value: string | ||
| } | ||
|
|
||
| const COLON_RE = /:/g | ||
| export function getRoutePath(tokens: SegmentToken[]): string { | ||
| return tokens.reduce((path, token) => { | ||
| return ( | ||
| path + | ||
| (token.type === SegmentTokenType.optional | ||
| ? `:${token.value}?` | ||
| : token.type === SegmentTokenType.dynamic | ||
| ? `:${token.value}()` | ||
| : token.type === SegmentTokenType.catchall | ||
| ? `:${token.value}(.*)*` | ||
| : token.type === SegmentTokenType.group | ||
| ? '' | ||
| : encodePath(token.value).replace(COLON_RE, '\\:')) | ||
| ) | ||
| }, '/') | ||
| } | ||
|
|
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| const PARAM_CHAR_RE = /[\w.]/ | ||
|
|
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| export function parseSegment(segment: string) { | ||
| let state: SegmentParserState = SegmentParserState.initial | ||
| let i = 0 | ||
|
|
||
| let buffer = '' | ||
| const tokens: SegmentToken[] = [] | ||
|
|
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| function consumeBuffer() { | ||
| if (!buffer) { | ||
| return | ||
| } | ||
| if (state === SegmentParserState.initial) { | ||
| throw new Error('wrong state') | ||
| } | ||
|
|
||
| tokens.push({ | ||
| type: | ||
| state === SegmentParserState.static | ||
| ? SegmentTokenType.static | ||
| : state === SegmentParserState.dynamic | ||
| ? SegmentTokenType.dynamic | ||
| : state === SegmentParserState.optional | ||
| ? SegmentTokenType.optional | ||
| : state === SegmentParserState.catchall | ||
| ? SegmentTokenType.catchall | ||
| : SegmentTokenType.group, | ||
| value: buffer | ||
| }) | ||
|
|
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| buffer = '' | ||
| } | ||
|
|
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| while (i < segment.length) { | ||
| const c = segment[i] | ||
|
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| switch (state) { | ||
| case SegmentParserState.initial: | ||
| buffer = '' | ||
| if (c === '[') { | ||
| state = SegmentParserState.dynamic | ||
| } else if (c === '(') { | ||
| state = SegmentParserState.group | ||
| } else { | ||
| i-- | ||
| state = SegmentParserState.static | ||
| } | ||
| break | ||
|
|
||
| case SegmentParserState.static: | ||
| if (c === '[') { | ||
| consumeBuffer() | ||
| state = SegmentParserState.dynamic | ||
| } else if (c === '(') { | ||
| consumeBuffer() | ||
| state = SegmentParserState.group | ||
| } else { | ||
| buffer += c | ||
| } | ||
| break | ||
|
|
||
| case SegmentParserState.catchall: | ||
| case SegmentParserState.dynamic: | ||
| case SegmentParserState.optional: | ||
| case SegmentParserState.group: | ||
| if (buffer === '...') { | ||
| buffer = '' | ||
| state = SegmentParserState.catchall | ||
| } | ||
| if (c === '[' && state === SegmentParserState.dynamic) { | ||
| state = SegmentParserState.optional | ||
| } | ||
| if (c === ']' && (state !== SegmentParserState.optional || segment[i - 1] === ']')) { | ||
| if (!buffer) { | ||
| throw new Error('Empty param') | ||
| } else { | ||
| consumeBuffer() | ||
| } | ||
| state = SegmentParserState.initial | ||
| } else if (c === ')' && state === SegmentParserState.group) { | ||
| if (!buffer) { | ||
| throw new Error('Empty group') | ||
| } else { | ||
| consumeBuffer() | ||
| } | ||
| state = SegmentParserState.initial | ||
| } else if (c && PARAM_CHAR_RE.test(c)) { | ||
| buffer += c | ||
| } else { | ||
| // console.debug(`[pages]Ignored character "${c}" while building param "${buffer}" from "segment"`) | ||
| } | ||
| break | ||
| } | ||
| i++ | ||
| } | ||
|
|
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| if (state === SegmentParserState.dynamic) { | ||
| throw new Error(`Unfinished param "${buffer}"`) | ||
| } | ||
|
|
||
| consumeBuffer() | ||
|
|
||
| return tokens | ||
| } |
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