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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,6 @@ | ||
| { | ||
| "compilerOptions": { | ||
| "module": "commonjs", | ||
| "module": "esnext", | ||
| "jsx": "react", | ||
| "baseUrl": "./" | ||
| }, | ||
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|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| import { useRef } from 'react'; | ||
| import { debounce } from 'lodash-es'; | ||
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| export default function useDebounce(handler) { | ||
| return useRef(debounce(handler, 250)).current; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| import { useFormik } from 'formik'; | ||
| import { uniqueId } from 'lodash-es'; | ||
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| import { convert } from 'utils/units'; | ||
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| const convertRegex = /([\d.-]+)\s+(\w+)\s+in\s+(\w+)/; | ||
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| export default function useScaleForm(onHistoryPush) { | ||
| return useFormik({ | ||
| initialValues: { | ||
| conversion: '' | ||
| }, | ||
| onSubmit: (vals, { setFieldError }) => { | ||
| if (convertRegex.test(vals.conversion)) { | ||
| const [, rawValue, unit, targetUnit] = | ||
| vals.conversion.match(convertRegex); | ||
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| if (!rawValue || !unit || !targetUnit) { | ||
| return setFieldError('conversion', 'Could not parse input.'); | ||
| } | ||
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| if (!convert().from(unit).possibilities().includes(targetUnit)) { | ||
| return setFieldError( | ||
| 'conversion', | ||
| `Cannot convert ${unit} to ${targetUnit}` | ||
| ); | ||
| } | ||
|
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| const value = parseFloat(rawValue); | ||
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| if (isNaN(value)) { | ||
| return setFieldError('conversion', `Could not parse value.`); | ||
| } | ||
|
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| onHistoryPush({ | ||
| id: uniqueId(), | ||
| unit, | ||
| targetUnit, | ||
| value | ||
| }); | ||
| } else { | ||
| const [rawValue, unit] = vals.conversion.split(/\s+/); | ||
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| if (!rawValue || !unit) { | ||
| return setFieldError('conversion', 'Could not parse input.'); | ||
| } | ||
|
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| const value = parseFloat(rawValue); | ||
|
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| if (isNaN(value)) { | ||
| return setFieldError('conversion', `Could not parse value.`); | ||
| } | ||
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| if (!convert().possibilities('length').includes(unit)) { | ||
| return setFieldError('conversion', `Unsupported unit ${unit}`); | ||
| } | ||
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| onHistoryPush({ | ||
| id: uniqueId(), | ||
| unit, | ||
| targetUnit: unit, | ||
| value | ||
| }); | ||
| } | ||
| } | ||
| }); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| import { useCallback } from 'react'; | ||
| import useLocalStorageState from 'use-local-storage-state'; | ||
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| import { convert } from 'utils/units'; | ||
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| const calculate = (entry, denominator) => ({ | ||
| ...entry, | ||
| result: | ||
| convert(entry.value).from(entry.unit).to(entry.targetUnit) * | ||
| (1 / denominator) | ||
| }); | ||
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| export default function useScaleHistory() { | ||
| const [denominator, setDenominator] = useLocalStorageState('denominator', { | ||
| defaultValue: 1 | ||
| }); | ||
| const [entries, setEntries] = useLocalStorageState('entries', { | ||
| defaultValue: [] | ||
| }); | ||
| const clearEntries = useCallback(() => setEntries([]), [setEntries]); | ||
| const pushEntry = useCallback( | ||
| (entry) => | ||
| setEntries((original) => [...original, calculate(entry, denominator)]), | ||
| [setEntries, denominator] | ||
| ); | ||
| const updateDenominator = useCallback( | ||
| (value) => { | ||
| setEntries((original) => | ||
| original.map((entry) => calculate(entry, value)) | ||
| ); | ||
| setDenominator(value); | ||
| }, | ||
| [setEntries, setDenominator] | ||
| ); | ||
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| return { entries, denominator, pushEntry, clearEntries, updateDenominator }; | ||
| } |
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