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17 Commits

Author SHA1 Message Date
Anders Kaseorg 35afd078f3 js: Convert static/js/transmit.js to ES6 module. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2021-02-28 14:23:00 -08:00
Anders Kaseorg f66441adb2 js: Convert static/js/zform.js to ES6 module. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2021-02-10 10:27:14 -08:00
Anders Kaseorg a6bf97057b js: Convert static/js/schema.js to ES6 module. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2021-02-10 10:27:14 -08:00
Anders Kaseorg d72423ef21 eslint: Replace empty-returns with consistent-return. 
Instead of prohibiting ‘return undefined’ (#8669), we require that a
function must return an explicit value always or never.  This prevents
you from forgetting to return a value in some cases.  It will also be
important for TypeScript, which distinguishes between undefined and
void.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-09-25 15:17:59 -07:00
Anders Kaseorg 6ec808b8df js: Add "use strict" directive to CommonJS files. 
ES and TypeScript modules are strict by default and don’t need this
directive.  ESLint will remind us to add it to new CommonJS files and
remove it from ES and TypeScript modules.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-07-31 22:09:46 -07:00
Anders Kaseorg b65d2e063d js: Reformat with Prettier. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-07-17 14:31:25 -07:00
Anders Kaseorg f3726db89a js: Normalize strings to double quotes. 
Prettier would do this anyway, but it’s separated out for a more
reviewable diff.  Generated by ESLint.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-07-17 14:31:24 -07:00
Anders Kaseorg e014ea966a eslint: Enable comma-dangle for functions. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-07-03 16:55:51 -07:00
Anders Kaseorg a79322bc94 eslint: Enable prefer-arrow-callback. 
Signed-off-by: Anders Kaseorg <anders@zulip.com>
 2020-07-03 16:55:50 -07:00
Anders Kaseorg 02511bff1c js: Automatically convert _.each to for…of. 
This commit was automatically generated by the following script,
followed by lint --fix and a few small manual lint-related cleanups.

import * as babelParser from "recast/parsers/babel";
import * as recast from "recast";
import * as tsParser from "recast/parsers/typescript";
import { builders as b, namedTypes as n } from "ast-types";
import { Context } from "ast-types/lib/path-visitor";
import K from "ast-types/gen/kinds";
import { NodePath } from "ast-types/lib/node-path";
import assert from "assert";
import fs from "fs";
import path from "path";
import process from "process";

const checkExpression = (node: n.Node): node is K.ExpressionKind =>
  n.Expression.check(node);
const checkStatement = (node: n.Node): node is K.StatementKind =>
  n.Statement.check(node);

for (const file of process.argv.slice(2)) {
  console.log("Parsing", file);
  const ast = recast.parse(fs.readFileSync(file, { encoding: "utf8" }), {
    parser: path.extname(file) === ".ts" ? tsParser : babelParser,
  });
  let changed = false;
  let inLoop = false;
  let replaceReturn = false;

  const visitLoop = (...args: string[]) =>
    function(this: Context, path: NodePath) {
      for (const arg of args) {
        this.visit(path.get(arg));
      }
      const old = { inLoop };
      inLoop = true;
      this.visit(path.get("body"));
      inLoop = old.inLoop;
      return false;
    };

  recast.visit(ast, {
    visitDoWhileStatement: visitLoop("test"),

    visitExpressionStatement(path) {
      const { expression, comments } = path.node;
      let valueOnly;
      if (
        n.CallExpression.check(expression) &&
        n.MemberExpression.check(expression.callee) &&
        !expression.callee.computed &&
        n.Identifier.check(expression.callee.object) &&
        expression.callee.object.name === "_" &&
        n.Identifier.check(expression.callee.property) &&
        ["each", "forEach"].includes(expression.callee.property.name) &&
        [2, 3].includes(expression.arguments.length) &&
        checkExpression(expression.arguments[0]) &&
        (n.FunctionExpression.check(expression.arguments[1]) ||
          n.ArrowFunctionExpression.check(expression.arguments[1])) &&
        [1, 2].includes(expression.arguments[1].params.length) &&
        n.Identifier.check(expression.arguments[1].params[0]) &&
        ((valueOnly = expression.arguments[1].params[1] === undefined) ||
          n.Identifier.check(expression.arguments[1].params[1])) &&
        (expression.arguments[2] === undefined ||
          n.ThisExpression.check(expression.arguments[2]))
      ) {
        const old = { inLoop, replaceReturn };
        inLoop = false;
        replaceReturn = true;
        this.visit(
          path
            .get("expression")
            .get("arguments")
            .get(1)
            .get("body")
        );
        inLoop = old.inLoop;
        replaceReturn = old.replaceReturn;

        const [right, { body, params }] = expression.arguments;
        const loop = b.forOfStatement(
          b.variableDeclaration("let", [
            b.variableDeclarator(
              valueOnly ? params[0] : b.arrayPattern([params[1], params[0]])
            ),
          ]),
          valueOnly
            ? right
            : b.callExpression(
                b.memberExpression(right, b.identifier("entries")),
                []
              ),
          checkStatement(body) ? body : b.expressionStatement(body)
        );
        loop.comments = comments;
        path.replace(loop);
        changed = true;
      }
      this.traverse(path);
    },

    visitForStatement: visitLoop("init", "test", "update"),

    visitForInStatement: visitLoop("left", "right"),

    visitForOfStatement: visitLoop("left", "right"),

    visitFunction(path) {
      this.visit(path.get("params"));
      const old = { replaceReturn };
      replaceReturn = false;
      this.visit(path.get("body"));
      replaceReturn = old.replaceReturn;
      return false;
    },

    visitReturnStatement(path) {
      if (replaceReturn) {
        assert(!inLoop); // could use labeled continue if this ever fires
        const { argument, comments } = path.node;
        if (argument === null) {
          const s = b.continueStatement();
          s.comments = comments;
          path.replace(s);
        } else {
          const s = b.expressionStatement(argument);
          s.comments = comments;
          path.replace(s, b.continueStatement());
        }
        return false;
      }
      this.traverse(path);
    },

    visitWhileStatement: visitLoop("test"),
  });

  if (changed) {
    console.log("Writing", file);
    fs.writeFileSync(file, recast.print(ast).code, { encoding: "utf8" });
  }
}

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
 2020-02-07 14:09:47 -08:00
Anders Kaseorg 28f3dfa284 js: Automatically convert var to let and const in most files. 
This commit was originally automatically generated using `tools/lint
--only=eslint --fix`.  It was then modified by tabbott to contain only
changes to a set of files that are unlikely to result in significant
merge conflicts with any open pull request, excluding about 20 files.
His plan is to merge the remaining changes with more precise care,
potentially involving merging parts of conflicting pull requests
before running the `eslint --fix` operation.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
 2019-11-03 12:42:39 -08:00
Anders Kaseorg d17b577d0c js: Purge useless IIFEs. 
With webpack, variables declared in each file are already file-local
(Global variables need to be explicitly exported), so these IIFEs are
no longer needed.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
 2019-10-25 13:51:21 -07:00
Anders Kaseorg db0b33842c templates: Replace templates.render with require calls. 
This removes an unnecessary layer of indirection and allows webpack to
catch filename mistakes.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
 2019-07-12 21:11:14 -07:00
Anders Kaseorg 3c3471b720 templates: Rename *.handlebars ↦ *.hbs and - ↦ _. 
Tweaked by tabbott to avoid accidentally disabling the linter for
handlebars templates.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
 2019-07-12 21:11:03 -07:00
Thomas Ip f6aaf43029 refactor: Use explicit path when referencing handlebars templates. 2019-07-02 16:23:30 -07:00
Armaan Ahluwalia 6d255efe4c app: Prepare JS files for consumption by webpack. 
This commit prepares the frontend code to be consumed by webpack.

It is a hack: In theory, modules should be declaring and importing the
modules they depend on and the globals they expose directly.

However, that requires significant per-module work, which we don't
really want to block moving our toolchain to webpack on.

So we expose the modules by setting window.varName = varName; as
needed in the js files.
 2018-07-05 10:53:36 +02:00
Steve Howell 1b57e568ff Add "zform" functionality to the web client. 
A "zform" knows how to render data that follows our
schema for widget messages with form elements like
buttons and choices.

This code won't be triggered until a subsequent
server-side commit takes widget_content from
API callers such as the trivial chat bot and
creates submessages for us.
 2018-05-24 09:30:22 -07:00