diff options
Diffstat (limited to 'packages/taler-wallet-core/src/util/denominations.ts')
| -rw-r--r-- | packages/taler-wallet-core/src/util/denominations.ts | 117 |
1 files changed, 77 insertions, 40 deletions
diff --git a/packages/taler-wallet-core/src/util/denominations.ts b/packages/taler-wallet-core/src/util/denominations.ts index cea940f48..4efb902c8 100644 --- a/packages/taler-wallet-core/src/util/denominations.ts +++ b/packages/taler-wallet-core/src/util/denominations.ts @@ -14,7 +14,16 @@ GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> */ -import { AbsoluteTime, AmountJson, Amounts, DenominationInfo, FeeDescription, FeeDescriptionPair, TalerProtocolTimestamp, TimePoint } from "@gnu-taler/taler-util"; +import { + AbsoluteTime, + AmountJson, + Amounts, + DenominationInfo, + FeeDescription, + FeeDescriptionPair, + TalerProtocolTimestamp, + TimePoint, +} from "@gnu-taler/taler-util"; /** * Given a list of denominations with the same value and same period of time: @@ -52,14 +61,17 @@ type PropsWithReturnType<T extends object, F> = Exclude< * Takes two list and create one with one timeline. * For any element in the position "p" on the left or right "list", then * list[p].until should be equal to list[p+1].from - * + * * @see {createDenominationTimeline} - * + * * @param left list denominations @type {FeeDescription} * @param right list denominations @type {FeeDescription} * @returns list of pairs for the same time */ -export function createDenominationPairTimeline(left: FeeDescription[], right: FeeDescription[]): FeeDescriptionPair[] { +export function createDenominationPairTimeline( + left: FeeDescription[], + right: FeeDescription[], +): FeeDescriptionPair[] { //both list empty, discarded if (left.length === 0 && right.length === 0) return []; @@ -69,31 +81,41 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe let ri = 0; while (li < left.length && ri < right.length) { - const currentValue = Amounts.cmp(left[li].value, right[ri].value) < 0 ? left[li].value : right[ri].value; - - let ll = 0 //left length (until next value) - while (li + ll < left.length && Amounts.cmp(left[li + ll].value, currentValue) === 0) { - ll++ + const currentValue = + Amounts.cmp(left[li].value, right[ri].value) < 0 + ? left[li].value + : right[ri].value; + + let ll = 0; //left length (until next value) + while ( + li + ll < left.length && + Amounts.cmp(left[li + ll].value, currentValue) === 0 + ) { + ll++; } - let rl = 0 //right length (until next value) - while (ri + rl < right.length && Amounts.cmp(right[ri + rl].value, currentValue) === 0) { - rl++ + let rl = 0; //right length (until next value) + while ( + ri + rl < right.length && + Amounts.cmp(right[ri + rl].value, currentValue) === 0 + ) { + rl++; } - const leftIsEmpty = ll === 0 - const rightIsEmpty = rl === 0 + const leftIsEmpty = ll === 0; + const rightIsEmpty = rl === 0; //check which start after, add gap so both list starts at the same time // one list may be empty - const leftStarts: AbsoluteTime = - leftIsEmpty ? { t_ms: "never" } : left[li].from; - const rightStarts: AbsoluteTime = - rightIsEmpty ? { t_ms: "never" } : right[ri].from; + const leftStarts: AbsoluteTime = leftIsEmpty + ? { t_ms: "never" } + : left[li].from; + const rightStarts: AbsoluteTime = rightIsEmpty + ? { t_ms: "never" } + : right[ri].from; //first time cut is the smallest time let timeCut: AbsoluteTime = leftStarts; if (AbsoluteTime.cmp(leftStarts, rightStarts) < 0) { - const ends = - rightIsEmpty ? left[li + ll - 1].until : right[0].from; + const ends = rightIsEmpty ? left[li + ll - 1].until : right[0].from; right.splice(ri, 0, { from: leftStarts, @@ -102,11 +124,10 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe }); rl++; - timeCut = leftStarts + timeCut = leftStarts; } if (AbsoluteTime.cmp(leftStarts, rightStarts) > 0) { - const ends = - leftIsEmpty ? right[ri + rl - 1].until : left[0].from; + const ends = leftIsEmpty ? right[ri + rl - 1].until : left[0].from; left.splice(li, 0, { from: rightStarts, @@ -115,7 +136,7 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe }); ll++; - timeCut = rightStarts + timeCut = rightStarts; } //check which ends sooner, add gap so both list ends at the same time @@ -130,7 +151,6 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe value: left[0].value, }); rl++; - } if (AbsoluteTime.cmp(leftEnds, rightEnds) < 0) { left.splice(li + ll, 0, { @@ -142,15 +162,23 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe } //now both lists are non empty and (starts,ends) at the same time - while (li < left.length && ri < right.length && Amounts.cmp(left[li].value, right[ri].value) === 0) { - - if (AbsoluteTime.cmp(left[li].from, timeCut) !== 0 && AbsoluteTime.cmp(right[ri].from, timeCut) !== 0) { + while ( + li < left.length && + ri < right.length && + Amounts.cmp(left[li].value, right[ri].value) === 0 + ) { + if ( + AbsoluteTime.cmp(left[li].from, timeCut) !== 0 && + AbsoluteTime.cmp(right[ri].from, timeCut) !== 0 + ) { // timeCut comes from the latest "until" (expiration from the previous) // and this value comes from the latest left or right // it should be the same as the "from" from one of the latest left or right // otherwise it means that there is missing a gap object in the middle // the list is not complete and the behavior is undefined - throw Error('one of the list is not completed: list[i].until !== list[i+1].from') + throw Error( + "one of the list is not completed: list[i].until !== list[i+1].from", + ); } pairList.push({ @@ -172,21 +200,26 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe timeCut = right[ri].until; ri++; } - pairList[pairList.length - 1].until = timeCut + pairList[pairList.length - 1].until = timeCut; - if (li < left.length && Amounts.cmp(left[li].value, pairList[pairList.length - 1].value) !== 0) { + if ( + li < left.length && + Amounts.cmp(left[li].value, pairList[pairList.length - 1].value) !== 0 + ) { //value changed, should break //this if will catch when both (left and right) change at the same time //if just one side changed it will catch in the while condition break; } - } - } //one of the list left or right can still have elements if (li < left.length) { - let timeCut = pairList.length > 0 && Amounts.cmp(pairList[pairList.length - 1].value, left[li].value) === 0 ? pairList[pairList.length - 1].until : left[li].from; + let timeCut = + pairList.length > 0 && + Amounts.cmp(pairList[pairList.length - 1].value, left[li].value) === 0 + ? pairList[pairList.length - 1].until + : left[li].from; while (li < left.length) { pairList.push({ left: left[li].fee, @@ -194,13 +227,17 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe from: timeCut, until: left[li].until, value: left[li].value, - }) - timeCut = left[li].until + }); + timeCut = left[li].until; li++; } } if (ri < right.length) { - let timeCut = pairList.length > 0 && Amounts.cmp(pairList[pairList.length - 1].value, right[ri].value) === 0 ? pairList[pairList.length - 1].until : right[ri].from; + let timeCut = + pairList.length > 0 && + Amounts.cmp(pairList[pairList.length - 1].value, right[ri].value) === 0 + ? pairList[pairList.length - 1].until + : right[ri].from; while (ri < right.length) { pairList.push({ right: right[ri].fee, @@ -208,12 +245,12 @@ export function createDenominationPairTimeline(left: FeeDescription[], right: Fe from: timeCut, until: right[ri].until, value: right[ri].value, - }) - timeCut = right[ri].until + }); + timeCut = right[ri].until; ri++; } } - return pairList + return pairList; } /** |