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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // Copyright DataStax, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| import BigNumber from 'bignumber.js'; | ||
|
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| export type CollNumRep = | ||
| | 'number' | ||
| | 'bigint' | ||
| | 'bignumber' | ||
| | 'string' | ||
| | 'number_or_string'; | ||
|
|
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| export type GetCollNumRepFn = (path: string[]) => CollNumRep; | ||
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| export type CollNumRepCfg = Record<string, CollNumRep>; | ||
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| const $NumRep = Symbol('NumRep'); | ||
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| interface NumRepTree { | ||
| [$NumRep]?: CollNumRep; | ||
| [key: string]: NumRepTree; | ||
| } | ||
|
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| export const collNumRepFnFromCfg = (cfg: CollNumRepCfg): GetCollNumRepFn => { | ||
| const tree = buildNumRepTree(cfg); | ||
|
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| return (path: string[]) => { | ||
| return findMatchingPath(path, tree) ?? 'number'; | ||
| }; | ||
| }; | ||
|
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| const buildNumRepTree = (cfg: CollNumRepCfg): NumRepTree => { | ||
| const result: NumRepTree = {}; | ||
|
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| Object.entries(cfg).forEach(([path, rep]) => { | ||
| const keys = path.split('.'); | ||
| let current = result; | ||
|
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| keys.forEach((key, index) => { | ||
| current[key] ??= {}; | ||
|
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| if (index === keys.length - 1) { | ||
| current[key][$NumRep] = rep; | ||
| } | ||
|
|
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| current = current[key]; | ||
| }); | ||
| }); | ||
|
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| return result; | ||
| }; | ||
|
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| const findMatchingPath = (path: string[], tree: NumRepTree | undefined): CollNumRep | undefined => { | ||
| if (!tree) { | ||
| return undefined; | ||
| } | ||
|
|
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| if (path.length === 0) { | ||
| return tree[$NumRep]; | ||
| } | ||
|
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| const [key, ...rest] = path; | ||
|
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| return findMatchingPath(rest, tree[key]) ?? findMatchingPath(rest, tree['*']) ?? tree['*']?.[$NumRep]; | ||
| }; | ||
|
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| export class NumCoercionError extends Error { | ||
| public readonly path: string[]; | ||
| public readonly value: number | BigNumber; | ||
| public readonly from: 'number' | 'bignumber'; | ||
| public readonly to: CollNumRep; | ||
|
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| public constructor(path: string[], value: number | BigNumber, from: 'number' | 'bignumber', to: CollNumRep) { | ||
| super(`Failed to coerce value from ${from} to ${to} at path: ${path.join('.')}`); | ||
| this.path = path; | ||
| this.value = value; | ||
| this.from = from; | ||
| this.to = to; | ||
| } | ||
| } |
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