some code chunks previously used `async.parallel` but if you
use `await` that forces them to be run serially. Instead,
you can initiate the operation (getting a Promise) and then
_later_ `await` the result of that Promise.
If you use `await` inside a loop it makes the loop inherently serial.
If you omit the `await` however, the tasks will all start but the loop
will finish while the tasks are still being scheduled.
So, to make a set of tasks run in parallel but then have the
code block after the loop once all the tasks have been completed
you have to get an array of Promises (one for each iteration) and
then use `Promise.all()` to wait for those promises to be resolved.
Using `Array#map` is a convenient way to go from an array of inputs
to the require array of Promises.
NB1: needs additional review and testing - no abiword available on my test bed
NB2: in ImportHandler.js, directly delete the file, and handle the eventual
error later: checking before for existence is prone to race conditions,
and does not handle any errors anyway.
- removed possible issue with failing to sanitize `padName` if `padId` was also
supplied
- removed unnecessary `try` block
- simplified API and function name matching tests
Also converted the handler functions that depend on checkAccess() into async
functions too.
NB: this commit needs specific attention to it because it touches a lot of
security related code!
This change is in preparation of the future async refactoring by Ray. It tries
to extract as many changes in boolean conditions as possible, in order to make
more evident identifying eventual logic bugs in the future work.
This proved already useful in at least one case.
BEWARE: this commit exposes an incoherency in the DB API, in which, depending
on the driver used, some functions can return null or undefined. This condition
will be externally fixed by the final commit in this series ("db/DB.js: prevent
DB layer from returning undefined"). Until that commit, the code base may have
some bugs.
This change extracts the grammar correction performed on the async branch,
anticipating them in a single commit. It cannot be folded with the previous
one, as it is not purely cosmetic.
This change is only cosmetic. Its aim is do make it easier to understand the
async changes that are going to be merged later on. It was extracted from the
original work from Ray Bellis.
To verify that nothing has changed, you can run the following command on each
file touched by this commit:
npm install uglify-es
diff --unified <(uglify-js --beautify bracketize <BEFORE.js>) <(uglify-js --beautify bracketize <AFTER.js>)
This is a complete script that does the same automatically (works from a
mercurial clone):
```bash
#!/usr/bin/env bash
set -eu
REVISION=<THIS_REVISION>
PARENT_REV=$(hg identify --rev "${REVISION}" --template '{p1rev}')
FILE_LIST=$(hg status --no-status --change ${REVISION})
UGLIFYJS="node_modules/uglify-es/bin/uglifyjs"
for FILE_NAME in ${FILE_LIST[@]}; do
echo "Checking ${FILE_NAME}"
diff --unified \
<("${UGLIFYJS}" --beautify bracketize <(hg cat --rev "${PARENT_REV}" "${FILE_NAME}")) \
<("${UGLIFYJS}" --beautify bracketize <(hg cat --rev "${REVISION}" "${FILE_NAME}"))
done
```
This is documented to be more performant.
The substitution was made on frontend code, too (i.e., the one in /static),
because Date.now() is supported since IE 9, and we are life supporting only
IE 11.
Commands:
find . -name *.js | xargs sed --in-place "s/new Date().getTime()/Date.now()/g"
find . -name *.js | xargs sed --in-place "s/(new Date()).getTime()/Date.now()/g"
Not done on jQuery.
The guard condition on count being non negative and < 100 used the wrong
boolean operator. In its form it was impossible.
This error was introduced in 2013, in 5592c4b0fe.
Fixes#3499
- path.exists() is no longer part of nodejs
- fs.exists() is deprecated (as of nodejs >= 8)
- checking a file for existence before using it is open to raca condition. It is
preferable to go ahead and use the file, and eventually handle the error
- we can afford two simple synchronous fs operations here
This commit vastly shortens (and simplifies) the version table within
handler/APIHandler.js by building each version's entry incrementally based off
the previous version.
The resulting table has been validated by comparing the "before" and "after"
output of the following loop on both versions of the code (albeit with an
intermediate "sort" step to account for the different insertion order)
for (let v in version) {
let m = version[v];
for (let [k, a] of Object.entries(m)) {
console.log(v, k, a);
}
}
The patch also fixes a few typos, and removes a duplicate definition of
getChatHistory which in each applicable version was defined with two different
parameter lists, but where only the second would be used.
Get rid of an else branch to simplify code layout. No functional changes at all.
==============
This series is an attempt to reduce the control structure depth of the code
base, maintaining at the same time its exact same behaviour, bugs included. It
is, in a sense, an initial attempt at a refactoring in the spirit of its
original definition [0].
The idea beyond this refactoring is that reducing the code depth and, sometimes,
inverting some conditions, bugs and logic errors may become easier to spot, and
the code easier to read.
When looked at ignoring whitespace changes, all of these diffs should appear
trivial.
[0] https://refactoring.com/
skinName must be a single string (no directory separators in it) pointing to an
existing directory under /src/static/skins.
In case these conditions are not met, its value is rewritten to "no-skin".
Also, the value of skinName if sent to the client via clientVars for allowing
its use it in the browser.
