ESPTerm web interface

This repository contains the ESPTerm web interface source files.

Installation

Run yarn install (if a yarn.lock file is present) to set up the build tools used for JS and SASS. (Otherwise, globally install sass.)

You also need PHP installed (preferably version >= 7, but older may work too). PHP is used to build the HTML files and apply substitutions.

Development

JavaScript source files can be found in the js/ folder, SASS files in the sass/ folder.

Fontello (icon font) is maintained in the fontello/ folder. To update Fontello, replace the fontello.zip file and run unpack.sh in the same folder. This will extract the needed CSS from the zip file and put them into the sass/ folder to be included with the other styles.

To test you changes (after building JS and CSS), run a PHP local server in the project directory using the server.sh script or by a command like php -S 0.0.0.0:2000 _dev_router.php. Template substitutions (that are normally done by the ESPTerm's webserver) applied to the files fior testing can be defined in _debug_replacements.php.

Template strings

Template strings are used to embed substitutions dynamically when serving the web page. They have the format %key%, %j:key% or %h:key%, the prefix j: and h: causes the value to be HTML- or JS-escaped.

HTML escape turns '"<> into HTML entities. JS escape turns '"\<>\r\n into the corresponding JS-string escape sequences (<> use \u003C and \u003E).

macOS Notes

To run unpack.sh and unpack Fontello icons on macOS, you must first install the GNU grep and sed and add them to your path, instead of using the pre-installed BSD versions.

Building

To build the final JS and CSS files, run build.sh. This script also puts static versions of the HTML files in the out/ folder to be retrieved by the ESPTerm's firmware build script.

Files with template substitutions use the .tpl suffix. This ensures they are not pre-gzipped when building the ESPTerm firmware, as .html files are sent to the browser already compressed to save file size and substitutions would not be possible.

Demo build

If the env variable ESP_DEMO is set when running build.sh, those static HTML files will be altered for use in the ESPTerm web demo (i.e. the JS will make no attempts to communicate with the back-end and use dummy values instead).

All files use the .html suffix in a demo build and have replacements applied using _debug_replacements.php.