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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | 4x 4x 4x 4x 4x 4x 4x 2x 2x 3x 3x 2x 3x 6x 5x 2x 2x 6x 1x 2x 5x 2x 3x 3x 3x 2x 2x 2x 2x 3x 2x | import {z} from 'zod';
import {ERRORS} from '@grnsft/if-core/utils';
import {
ExecutePlugin,
PluginParams,
SubtractConfig,
} from '@grnsft/if-core/types';
import {validate} from '../../util/validations';
import {STRINGS} from '../../config';
const {InputValidationError} = ERRORS;
const {MISSING_INPUT_DATA, NOT_NUMERIC_VALUE} = STRINGS;
export const Subtract = (globalConfig: SubtractConfig): ExecutePlugin => {
const metadata = {
kind: 'execute',
};
/**
* Checks global config value are valid.
*/
const validateGlobalConfig = () => {
const globalConfigSchema = z.object({
'input-parameters': z.array(z.string()),
'output-parameter': z.string().min(1),
});
return validate<z.infer<typeof globalConfigSchema>>(
globalConfigSchema,
globalConfig
);
};
/**
* Checks for required fields in input.
*/
const validateSingleInput = (
input: PluginParams,
inputParameters: string[]
) => {
inputParameters.forEach(metricToSubtract => {
validateParamExists(input, metricToSubtract);
validateNumericString(input[metricToSubtract]);
});
return input;
};
const validateParamExists = (input: PluginParams, param: string) => {
if (input[param] === undefined) {
throw new InputValidationError(MISSING_INPUT_DATA(param));
}
};
const validateNumericString = (str: string) => {
Iif (isNaN(+Number(str))) {
throw new InputValidationError(NOT_NUMERIC_VALUE(str));
}
};
/**
* Subtract items from inputParams[1..n] from inputParams[0] and write the result in a new param outputParam.
*/
const execute = (inputs: PluginParams[]): PluginParams[] => {
const {
'input-parameters': inputParameters,
'output-parameter': outputParameter,
} = validateGlobalConfig();
return inputs.map(input => {
validateSingleInput(input, inputParameters);
return {
...input,
[outputParameter]: calculateDiff(input, inputParameters),
};
});
};
/**
* Calculates the diff between the 1st item in the inputs nad the rest of the items
*/
const calculateDiff = (input: PluginParams, inputParameters: string[]) => {
const [firstItem, ...restItems] = inputParameters;
return restItems.reduce(
(accumulator, metricToSubtract) => accumulator - input[metricToSubtract],
input[firstItem] // Starting accumulator with the value of the first item
);
};
return {
metadata,
execute,
};
};
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