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55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
"use strict";
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// FIXME: Clearly document that this only splits lines in *strings*, not eg. Buffers (and make a separate split-lines-buffer package for that, as it requires a very different implementation)
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const lastItem = require("last-item");
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const pipe = require("@promistream/pipe");
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const map = require("@promistream/map");
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const buffer = require("@promistream/buffer");
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const lastWill = require("@promistream/last-will");
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const { validateOptions, validateValue } = require("@validatem/core");
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const defaultTo = require("@validatem/default-to");
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const isBoolean = require("@validatem/is-boolean");
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const isString = require("@validatem/is-string");
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module.exports = function splitLines(_options) {
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let options = validateOptions(arguments, [
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defaultTo({}), {
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stripCarriageReturn: [ defaultTo(true), isBoolean ]
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}
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]);
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let stringBuffer = "";
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return pipe([
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map((value) => {
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validateValue(value, [ isString ]); // FIXME: Turn this into a clearer error
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stringBuffer += value;
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let lines = stringBuffer.split("\n");
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if (lines.length > 1) {
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let completedLines = lines.slice(0, -1);
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stringBuffer = lastItem(lines);
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if (options.stripCarriageReturn) {
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return completedLines.map((line) => {
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return line.replace(/\r+$/g, "");
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});
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} else {
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return completedLines;
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}
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} else {
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return [];
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}
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}),
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buffer(),
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lastWill(() => {
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return stringBuffer;
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})
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]);
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};
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