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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 | 1x 2x 2x 2x 3x 3x 3x 3x 2x 2x | import { DynamoAttributeValue } from "@aws-cdk/aws-stepfunctions-tasks";
import { DynamoExpressionPlaceholder } from "./types";
/**
* Builds an expression and expression attribute values from template string.
*/
export const dynamoExpr = (
literals: TemplateStringsArray,
...placeholers: DynamoExpressionPlaceholder[]
): [expr: string, values: { [key: string]: DynamoAttributeValue }] => {
let expression = "";
const vs: { [key: string]: DynamoAttributeValue } = {};
placeholers.forEach((pv, idx) => {
const ref = `:${pv.name}`;
expression += literals[idx];
expression += ref;
vs[ref] = pv.value;
});
expression += literals[literals.length - 1];
return [expression, vs];
};
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