1 files changed, 0 insertions, 172 deletions
diff --git a/std/encoding/csv_stringify.ts b/std/encoding/csv_stringify.ts
deleted file mode 100644
index 921631d37..000000000
--- a/std/encoding/csv_stringify.ts
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-// Implements the CSV spec at https://tools.ietf.org/html/rfc4180
-
-// This module is browser compatible.
-
-const QUOTE = '"';
-export const NEWLINE = "\r\n";
-
-export class StringifyError extends Error {
-  readonly name = "StringifyError";
-}
-
-function getEscapedString(value: unknown, sep: string): string {
-  if (value === undefined || value === null) return "";
-  let str = "";
-
-  if (typeof value === "object") str = JSON.stringify(value);
-  else str = String(value);
-
-  // Is regex.test more performant here? If so, how to dynamically create?
-  // https://stackoverflow.com/questions/3561493/
-  if (str.includes(sep) || str.includes(NEWLINE) || str.includes(QUOTE)) {
-    return `${QUOTE}${str.replaceAll(QUOTE, `${QUOTE}${QUOTE}`)}${QUOTE}`;
-  }
-
-  return str;
-}
-
-type PropertyAccessor = number | string;
-
-/**
- * @param fn Optional callback for transforming the value
- *
- * @param header Explicit column header name. If omitted,
- * the (final) property accessor is used for this value.
- *
- * @param prop Property accessor(s) used to access the value on the object
- */
-export type ColumnDetails = {
-  // "unknown" is more type-safe, but inconvenient for user. How to resolve?
-  // deno-lint-ignore no-explicit-any
-  fn?: (value: any) => string | Promise<string>;
-  header?: string;
-  prop: PropertyAccessor | PropertyAccessor[];
-};
-
-export type Column = ColumnDetails | PropertyAccessor | PropertyAccessor[];
-
-type NormalizedColumn = Omit<ColumnDetails, "header" | "prop"> & {
-  header: string;
-  prop: PropertyAccessor[];
-};
-
-function normalizeColumn(column: Column): NormalizedColumn {
-  let fn: NormalizedColumn["fn"],
-    header: NormalizedColumn["header"],
-    prop: NormalizedColumn["prop"];
-
-  if (typeof column === "object") {
-    if (Array.isArray(column)) {
-      header = String(column[column.length - 1]);
-      prop = column;
-    } else {
-      ({ fn } = column);
-      prop = Array.isArray(column.prop) ? column.prop : [column.prop];
-      header = typeof column.header === "string"
-        ? column.header
-        : String(prop[prop.length - 1]);
-    }
-  } else {
-    header = String(column);
-    prop = [column];
-  }
-
-  return { fn, header, prop };
-}
-
-type ObjectWithStringPropertyKeys = Record<string, unknown>;
-
-/** An object (plain or array) */
-export type DataItem = ObjectWithStringPropertyKeys | unknown[];
-
-/**
- * Returns an array of values from an object using the property accessors
- * (and optional transform function) in each column
- */
-async function getValuesFromItem(
-  item: DataItem,
-  normalizedColumns: NormalizedColumn[],
-): Promise<unknown[]> {
-  const values: unknown[] = [];
-
-  for (const column of normalizedColumns) {
-    let value: unknown = item;
-
-    for (const prop of column.prop) {
-      if (typeof value !== "object" || value === null) continue;
-      if (Array.isArray(value)) {
-        if (typeof prop === "number") value = value[prop];
-        else {
-          throw new StringifyError('Property accessor is not of type "number"');
-        }
-      } // I think this assertion is safe. Confirm?
-      else value = (value as ObjectWithStringPropertyKeys)[prop];
-    }
-
-    if (typeof column.fn === "function") value = await column.fn(value);
-    values.push(value);
-  }
-
-  return values;
-}
-
-/**
- * @param headers Whether or not to include the row of headers.
- * Default: `true`
- *
- * @param separator Delimiter used to separate values. Examples:
- *  - `","` _comma_ (Default)
- *  - `"\t"` _tab_
- *  - `"|"` _pipe_
- *  - etc.
- */
-export type StringifyOptions = {
-  headers?: boolean;
-  separator?: string;
-};
-
-/**
- * @param data The array of objects to encode
- * @param columns Array of values specifying which data to include in the output
- * @param options Output formatting options
- */
-export async function stringify(
-  data: DataItem[],
-  columns: Column[],
-  options: StringifyOptions = {},
-): Promise<string> {
-  const { headers, separator: sep } = {
-    headers: true,
-    separator: ",",
-    ...options,
-  };
-  if (sep.includes(QUOTE) || sep.includes(NEWLINE)) {
-    const message = [
-      "Separator cannot include the following strings:",
-      '  - U+0022: Quotation mark (")',
-      "  - U+000D U+000A: Carriage Return + Line Feed (\\r\\n)",
-    ].join("\n");
-    throw new StringifyError(message);
-  }
-
-  const normalizedColumns = columns.map(normalizeColumn);
-  let output = "";
-
-  if (headers) {
-    output += normalizedColumns
-      .map((column) => getEscapedString(column.header, sep))
-      .join(sep);
-    output += NEWLINE;
-  }
-
-  for (const item of data) {
-    const values = await getValuesFromItem(item, normalizedColumns);
-    output += values
-      .map((value) => getEscapedString(value, sep))
-      .join(sep);
-    output += NEWLINE;
-  }
-
-  return output;
-}