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Support functions in Denomination

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This commit is contained in:
pietervdvn 2021-06-25 20:39:01 +02:00
parent 37dab7a9a2
commit ddb2947271
1 changed files with 40 additions and 2 deletions
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42
Customizations/JSON/Denomination.ts
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@ -10,6 +10,7 @@ export class Unit {
public readonly denominationsSorted: Denomination[];
public readonly defaultDenom: Denomination;
public readonly eraseInvalid: boolean;
private readonly possiblePostFixes: string[] = []
constructor(appliesToKeys: string[], applicableUnits: Denomination[], eraseInvalid: boolean) {
this.appliesToKeys = new Set(appliesToKeys);
@ -32,6 +33,22 @@ export class Unit {
}
this.denominationsSorted = [...this.denominations]
this.denominationsSorted.sort((a, b) => b.canonical.length - a.canonical.length)
const possiblePostFixes = new Set<string>()
function addPostfixesOf(str){
for (let i = 0; i < str.length + 1; i++) {
const substr = str.substring(0,i)
possiblePostFixes.add(substr)
}
}
for (const denomination of this.denominations) {
addPostfixesOf(denomination.canonical)
denomination.alternativeDenominations.forEach(addPostfixesOf)
}
this.possiblePostFixes = Array.from(possiblePostFixes)
this.possiblePostFixes.sort((a, b) => b.length - a .length)
}
isApplicableToKey(key: string | undefined): boolean {
@ -69,6 +86,27 @@ export class Unit {
return new Combine(elems)
}
/**
* Returns the value without any (sub)parts of any denomination - usefull as preprocessing step for validating inputs.
* E.g.
* if 'megawatt' is a possible denomination, then '5 Meg' will be rewritten to '5' (which can then be validated as a valid pnat)
*
* Returns the original string if nothign matches
*/
stripUnitParts(str: string) {
if(str === undefined){
return undefined;
}
for (const denominationPart of this.possiblePostFixes) {
if(str.endsWith(denominationPart)){
return str.substring(0, str.length - denominationPart.length).trim()
}
}
return str;
}
}
export class Denomination {
@ -131,7 +169,7 @@ export class Denomination {
value = value.toLowerCase()
if (this.prefix) {
if (value.startsWith(this.canonical)) {
if (value.startsWith(this.canonical) && this.canonical !== "") {
return value.substring(this.canonical.length).trim();
}
for (const alternativeValue of this.alternativeDenominations) {
@ -140,7 +178,7 @@ export class Denomination {
}
}
} else {
if (value.endsWith(this.canonical)) {
if (value.endsWith(this.canonical) && this.canonical !== "") {
return value.substring(0, value.length - this.canonical.length).trim();
}
for (const alternativeValue of this.alternativeDenominations) {