raymond/analytics-api
0
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

reconstruct

Browse source
This commit is contained in:
RaymondHung-datacom 2025-09-25 16:28:20 +09:00
parent 20002030ad
commit ca8bded949
17 changed files with 1268 additions and 1110 deletions
Download patch file Download diff file Expand all files Collapse all files

77
services/retail_metrics.ts Normal file
View file

@ -0,0 +1,77 @@
export function purchaseIndex(totalItemsSold: number, numberOfCustomers: number): number {
if (numberOfCustomers === 0) {
throw new Error('Number of customers cannot be zero');
}
return (totalItemsSold / numberOfCustomers) * 1000;
}
export function purchaseRate(productPurchases: number, totalTransactions: number): number;
export function purchaseRate(productPurchases: number[], totalTransactions: number[]): number[];
export function purchaseRate(productPurchases: number | number[], totalTransactions: number | number[]): number | number[] {
if (Array.isArray(productPurchases) && Array.isArray(totalTransactions)) {
if (productPurchases.length !== totalTransactions.length) throw new Error('Arrays must have the same length');
return productPurchases.map((pp, i) => purchaseRate(pp, totalTransactions[i]));
}
if (typeof productPurchases === 'number' && typeof totalTransactions === 'number') {
if (totalTransactions === 0) throw new Error('Total transactions cannot be zero');
return (productPurchases / totalTransactions) * 100;
}
throw new Error('Input types must match');
}
export function liftValue(jointPurchaseRate: number, productAPurchaseRate: number, productBPurchaseRate: number): number;
export function liftValue(jointPurchaseRate: number[], productAPurchaseRate: number[], productBPurchaseRate: number[]): number[];
export function liftValue(jointPurchaseRate: number | number[], productAPurchaseRate: number | number[], productBPurchaseRate: number | number[]): number | number[] {
if (Array.isArray(jointPurchaseRate) && Array.isArray(productAPurchaseRate) && Array.isArray(productBPurchaseRate)) {
if (jointPurchaseRate.length !== productAPurchaseRate.length || jointPurchaseRate.length !== productBPurchaseRate.length) throw new Error('Arrays must have the same length');
return jointPurchaseRate.map((jpr, i) => liftValue(jpr, productAPurchaseRate[i], productBPurchaseRate[i]));
}
if (typeof jointPurchaseRate === 'number' && typeof productAPurchaseRate === 'number' && typeof productBPurchaseRate === 'number') {
const expectedJointRate = productAPurchaseRate * productBPurchaseRate;
if (expectedJointRate === 0) throw new Error('Expected joint rate cannot be zero');
return jointPurchaseRate / expectedJointRate;
}
throw new Error('Input types must match');
}
export function costRatio(cost: number, salePrice: number): number;
export function costRatio(cost: number[], salePrice: number[]): number[];
export function costRatio(cost: number | number[], salePrice: number | number[]): number | number[] {
if (Array.isArray(cost) && Array.isArray(salePrice)) {
if (cost.length !== salePrice.length) throw new Error('Arrays must have the same length');
return cost.map((c, i) => costRatio(c, salePrice[i]));
}
if (typeof cost === 'number' && typeof salePrice === 'number') {
if (salePrice === 0) throw new Error('Sale price cannot be zero');
return cost / salePrice;
}
throw new Error('Input types must match');
}
export function grossMarginRate(salePrice: number, cost: number): number;
export function grossMarginRate(salePrice: number[], cost: number[]): number[];
export function grossMarginRate(salePrice: number | number[], cost: number | number[]): number | number[] {
if (Array.isArray(salePrice) && Array.isArray(cost)) {
if (salePrice.length !== cost.length) throw new Error('Arrays must have the same length');
return salePrice.map((sp, i) => grossMarginRate(sp, cost[i]));
}
if (typeof salePrice === 'number' && typeof cost === 'number') {
if (salePrice === 0) throw new Error('Sale price cannot be zero');
return (salePrice - cost) / salePrice;
}
throw new Error('Input types must match');
}
export function averageSpendPerCustomer(totalRevenue: number, numberOfCustomers: number): number;
export function averageSpendPerCustomer(totalRevenue: number[], numberOfCustomers: number[]): number[];
export function averageSpendPerCustomer(totalRevenue: number | number[], numberOfCustomers: number | number[]): number | number[] {
if (Array.isArray(totalRevenue) && Array.isArray(numberOfCustomers)) {
if (totalRevenue.length !== numberOfCustomers.length) throw new Error('Arrays must have the same length');
return totalRevenue.map((tr, i) => averageSpendPerCustomer(tr, numberOfCustomers[i]));
}
if (typeof totalRevenue === 'number' && typeof numberOfCustomers === 'number') {
if (numberOfCustomers === 0) throw new Error('Number of customers cannot be zero');
return totalRevenue / numberOfCustomers;
}
throw new Error('Input types must match');
}