-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
2 changed files
with
123 additions
and
123 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
122 changes: 122 additions & 0 deletions
122
src/config/normalize/lib/wild_wild_path/parsing/query.js
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| import { | ||
| ESCAPE, | ||
| PATH_SEPARATOR, | ||
| PATH_SEPARATOR_NAME, | ||
| TOKEN_SEPARATOR, | ||
| SPECIAL_CHARS, | ||
| } from '../tokens/escape.js' | ||
| import { getStringTokenType } from '../tokens/main.js' | ||
|
|
||
| // Use imperative logic for performance | ||
| // eslint-disable-next-line complexity | ||
| export const parseQuery = function (query) { | ||
| const state = getInitialState() | ||
|
|
||
| // eslint-disable-next-line fp/no-loops | ||
| for (; state.index <= query.length; state.index += 1) { | ||
| const char = query[state.index] | ||
|
|
||
| // eslint-disable-next-line max-depth | ||
| if (char === ESCAPE) { | ||
| parseEscape(state, query) | ||
| } else if (char === TOKEN_SEPARATOR) { | ||
| addToken(state) | ||
| } else if (char === PATH_SEPARATOR || state.index === query.length) { | ||
| addPath(state) | ||
| } else { | ||
| state.chars += char | ||
| } | ||
| } | ||
|
|
||
| return state.paths | ||
| } | ||
|
|
||
| const getInitialState = function () { | ||
| const state = { paths: [], index: 0 } | ||
| resetPathState(state) | ||
| resetTokenState(state) | ||
| return state | ||
| } | ||
|
|
||
| const parseEscape = function (state, query) { | ||
| const nextChar = query[state.index + 1] | ||
|
|
||
| if (SPECIAL_CHARS.has(nextChar)) { | ||
| state.index += 1 | ||
| state.chars += nextChar | ||
| return | ||
| } | ||
|
|
||
| if (state.chars.length !== 0) { | ||
| throw new Error( | ||
| `character "${ESCAPE}" must either be at the start of a token, or be followed by ${PATH_SEPARATOR_NAME} or ${TOKEN_SEPARATOR} or ${ESCAPE}`, | ||
| ) | ||
| } | ||
|
|
||
| state.isProp = true | ||
| } | ||
|
|
||
| const addPath = function (state) { | ||
| if (hasNoPath(state)) { | ||
| return | ||
| } | ||
|
|
||
| if (!hasOnlyDots(state)) { | ||
| addToken(state) | ||
| } | ||
|
|
||
| // eslint-disable-next-line fp/no-mutating-methods | ||
| state.paths.push(state.path) | ||
| resetPathState(state) | ||
| } | ||
|
|
||
| // When the query is an empty string or when two spaces are consecutive | ||
| const hasNoPath = function (state) { | ||
| return state.firstToken && state.chars.length === 0 && state.path.length === 0 | ||
| } | ||
|
|
||
| const resetPathState = function (state) { | ||
| state.path = [] | ||
| state.firstToken = true | ||
| state.onlyDots = true | ||
| } | ||
|
|
||
| const addToken = function (state) { | ||
| if (handleLeadingDot(state)) { | ||
| return | ||
| } | ||
|
|
||
| state.onlyDots = hasOnlyDots(state) | ||
| const tokenType = getStringTokenType(state.chars, state.isProp) | ||
| const token = tokenType.normalize(tokenType.parse(state.chars)) | ||
| // eslint-disable-next-line fp/no-mutating-methods | ||
| state.path.push(token) | ||
| resetTokenState(state) | ||
| } | ||
|
|
||
| // In principle, the root query should be an empty string. | ||
| // But we use a lone dot instead because: | ||
| // - It distinguishes it from an absence of query | ||
| // - It allows parsing it in the middle of a space-separated list of queries | ||
| // (as opposed to an empty string) | ||
| // However, we create ambiguities for queries with only dots (including a | ||
| // lone dot), where the last dot should not create an additional token. | ||
| const hasOnlyDots = function (state) { | ||
| return state.onlyDots && state.chars.length === 0 | ||
| } | ||
|
|
||
| // We ignore leading dots, because they are used to represent the root. | ||
| // We do not require them for simplicity. | ||
| const handleLeadingDot = function (state) { | ||
| if (!state.firstToken) { | ||
| return false | ||
| } | ||
|
|
||
| state.firstToken = false | ||
| return state.chars.length === 0 | ||
| } | ||
|
|
||
| const resetTokenState = function (state) { | ||
| state.isProp = false | ||
| state.chars = '' | ||
| } |