Trying to load a map in the frontend, containing no "Icon" results in this error:

Warning: filemtime(): stat failed for /var/customers/webs/moarhof/assets/leaflet/js/icons.js in system/modules/core/library/Contao/Controller.php on line 857

#0 [internal function]: __error(2, 'filemtime(): st...', '/var/customers/...', 857, Array)
#1 system/modules/core/library/Contao/Controller.php(857): filemtime('/var/customers/...')
#2 system/modules/core/classes/FrontendTemplate.php(102): Contao\Controller::replaceDynamicScriptTags('...')
#3 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#4 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#5 index.php(20): Contao\FrontendIndex->run()
#6 {main}


Fatal error: Uncaught exception Exception with message File assets/leaflet/js/icons.js does not exist thrown in system/modules/core/library/Contao/Combiner.php on line 139

#0 system/modules/core/library/Contao/Controller.php(860): Contao\Combiner->add('assets/leaflet/...', false)
#1 system/modules/core/classes/FrontendTemplate.php(102): Contao\Controller::replaceDynamicScriptTags('...')
#2 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#3 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#4 index.php(20): Contao\FrontendIndex->run()
#5 {main}

Adding an dummy icon to the map, removes the error and loads the map as intent, because a icons.js gets generated. Obviously loading the asset should be skipped when there is no need. Additionally I noticed the icons.js not being deleted or emptied when removing the last Icon from Backend. Therefore if you ever added and removed an Icon the error above will never appear.

Export translations to transifex and get translators.

Filters are broken atm.

Copied from #42:

Also on the bottom of every backend page i get this:

Fatal error: Uncaught exception 'Exception' with message 'Invalid connection resource' in /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Statement.php:92
Stack trace:
#0 /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Mysql.php(355): Contao\Database\Statement->__construct(Resource id #2, false)
#1 /var/customers/webs/moarhof/system/modules/core/library/Contao/Database.php(181): Contao\Database\Mysql->createStatement(Resource id #2, false)
#2 /var/customers/webs/moarhof/system/modules/core/classes/BackendUser.php(163): Contao\Database->prepare('UPDATE tl_user ...')
#3 [internal function]: Contao\BackendUser->__destruct()
#4 {main}
  thrown in /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Statement.php on line 92

Like the map has an expert setting to pass custom options it should be available for layers as well.

We cannot do it for markers and vectors as they get created from GeoJSON. Use an input field to create an feature.properties.data field instead. Use the data property instead of the properties so that it is not mixed with some internal data being set.

Allow to use aliases which are unique by it's parent id. Map controls do not really have an unique database id.

Check which has changed in coming 1.0.0 release and build compatibility layer

• Removal of Multiple* vector layers
• ....

Add user permissions to limit access to specific parts of Contao leaflet.

• Grant access to specific layers only.
• Only grant access to edit data on a layer.
• Grant access to style, icon and popup

If the auto pan setting is empty an empty option array is set, which prevents Leaflet to pan the map.

I just wondered if there will be a version for the new Contao 4 LTS, and asking what I can do for that (besides pull requests for the manager).

Add credits page for all used libraries, plugins, extensions.

Implement marker cluster layer.

It should be possible to choose a marker position in the backend via click on the map.

At the moment only tile layers of leaflet-providers can be defined. Provide support for custom tile layers.

Add option to filter data layers by the current bounding box.

Implement an overpass api layer which nicely integrates into the Contao Leaflet feature.

Starting points could be:

• https://github.com/kartenkarsten/leaflet-layer-overpass
• https://github.com/tyrasd/osmtogeojson

Feature requests are:

• Make auto request based on bbox
• Define icons for different amenities.
• Define style for polylines
• Easy to hook in to create the popup

When creating a control the default position of the selected control should be set.

Replace insert tags for labels and popup content.

Translations are missing for frontend module and ce integration.

Additional to the used geosjon data format, topo json should be supported as well.

• Consider which leaflet plugin to use, probably mapbox/leaflet-omnivore
• Implement topo json encoding in PHP (or find a library for that.)

Problem
When using a leaflet-map as article element, you get a white screen after saving the changes in backend and frontend every time you visit the article.

Reproduce
Install Contao 3.5 as well as contao-leaflet-maps 1.0.0-beta3 ref ff8cda1 from composer. Create any map-provider and any map with it. Navigate to an article and insert it there as element.

Errors
When enabling error messages you will get this output: Fatal error: Cannot make static method Contao\Controller::replaceInsertTags() non static in class Netzmacht\Contao\Leaflet\Frontend\Helper\FrontendApi in /path/composer/vendor/netzmacht/contao-leaflet-maps/src/Netzmacht/Contao/Leaflet/Frontend/Helper/FrontendApi.php on line 30

Solution
Apparently the line in question misses a static and should be written

public static function replaceInsertTags($strBuffer, $blnCache = true)

instead. This way everything shows correctly on both, front- and backend.

Duplicating maps fails because the alias is set as an unique field so far. Contao does not trigger a save callback when copying the map, so have to find a way to fix it.

Maybe use nullIfEmpty helps?

There should be an option to import data. Would be really nice to provide some filters, f.e.

https://github.com/andreychumak/simplify-php

We use a lot of config variables. Consider to move them into an own config.

At the moment following globals are used:

LEAFLET_MAPPERS
LEAFLET_ENCODERS
LEAFLET_LAYERS
LEAFLET_CONTROLS
LEAFLET_ICONS
LEAFLET_VECTORS
LEAFLET_STYLES
LEAFLET_TILE_PROVIDERS
LEAFLET_LIBRARIES

Each configuration should go into a config/leaflet.php or config/leaflet.json file.

return array(
    'mappers' => array(
        // ...
    ),
    'encoders' => array(
        // ...
    ),
    // ...
);

Could be implemented like the contao-bootstrap configuration subsystem. Drawback would be that removing an item from the config is not possible enymore as the arrays would be merged together.

Rewrite about page and custom route.

Following dependencies has to be stable for releasing a stable version:

• netzmacht/contao-dev-tools
• netzmacht/php-javascript-builder
• netzmacht/php-leaflet

When switching between overlay/baselayer for an already added layer saving does not work.

I get this message on composer install:

Package bit3/contao-meta-palettes is abandoned, you should avoid using it.
Use contao-community-alliance/meta-palettes instead.

So the package should be replaced.

Instead of handle the ajax request in the frontend module/content element a custom route should be used.
We have to emulate the contao page environment for it otherwise some functions won't work. MetaModels integration could be the show stopper here.

Support encoded polylines.

• Choose best leaflet plugin
• Find/implement PHP encoding of the polyline

This Link will not work anymore
https://github.com/netzmacht/contao-leaflet-maps/blob/master/leafletjs.com/reference.html

Trying to add a map on a brand new installed netzmacht/contao-leaflet-maps 2.0.0-beta2 throws me this error:

Fatal error: Uncaught exception Exception with message Query error: Column 'cacheLifeTime' cannot be null (INSERT INTO tl_leaflet_map (zoom, adjustZoomExtra, dragging, touchZoom, scrollWheelZoom, doubleClickZoom, boxZoom, tap, trackResize, bounceAtZoomLimits, closeOnClick, keyboard, keyboardPanOffset, keyboardZoomOffset, zoomControl, adjustBounds, dynamicLoad, locate, locateWatch, locateTimeout, locateMaximumAge, enableHighAccuracy, cache, cacheLifeTime, tstamp) VALUES ('', 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 80, 1, 1, 0, 0, 0, 0, NULL, NULL, 0, 0, NULL, 0)) thrown in system/modules/core/library/Contao/Database/Statement.php on line 295

#0 system/modules/core/library/Contao/Database/Statement.php(264): Contao\Database\Statement->query()
#1 system/modules/core/drivers/DC_Table.php(689): Contao\Database\Statement->execute()
#2 system/modules/core/classes/Backend.php(650): Contao\DC_Table->create()
#3 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('leaflet_map')
#4 contao/main.php(20): Contao\BackendMain->run()
#5 {main}

Also on the bottom of every backend page i get this:

Fatal error: Uncaught exception 'Exception' with message 'Invalid connection resource' in /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Statement.php:92
Stack trace:
#0 /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Mysql.php(355): Contao\Database\Statement->__construct(Resource id #2, false)
#1 /var/customers/webs/moarhof/system/modules/core/library/Contao/Database.php(181): Contao\Database\Mysql->createStatement(Resource id #2, false)
#2 /var/customers/webs/moarhof/system/modules/core/classes/BackendUser.php(163): Contao\Database->prepare('UPDATE tl_user ...')
#3 [internal function]: Contao\BackendUser->__destruct()
#4 {main}
  thrown in /var/customers/webs/moarhof/system/modules/core/library/Contao/Database/Statement.php on line 92

This Package is not installable via Composer using Contao 3.5, because the following requirement cannot be met:
contao/core >=3.2,<3.5-dev

Instead the core requirement should be:
contao/core >=3.2,<4.0-dev

After uninstalling contao-leaflet-maps it only disapears from the extension list in the composer client (Paketverwaltung). Maps, layers etc. are still there in the backend menu. Also the folders system/modules/leaflet and system/modules/leaflet-libs are not removed.

Support useful plugins:

• Leaflet.MultiTileLayer
• Minimap Layers control
• Leaflet.MiniMap
• MapQuest Routing
• Leaflet.fullscreen or http://brunob.github.io/leaflet.fullscreen/
• Leaflet.Elevation
• Turbo87/sidebar-v2
• Leaflet.NavBar
• Leaflet-hash
• Leaflet.groupedlayercontrol
• Leaflet.ExtraMarkers

The new dynamic loading could create a lot of requests. Add a cache layer for that,

Improve frontend integration by:

• Add map template selection
• Allow custom map id

Implement a cache layer for icons and map definitions.

At the moment the map can only be added as content element. Also support a frontend module.

Setup travis CI and fix code style.

Implement a meta models layer, which can:

• Define coordinates by attributes
• Provides geojson feature as attribute value
• Provides file list of geojson files as attribute value
• Render item as popup content
• Map attributes to feature options

Register all event subscribers formerly registered in config/event_subscriber.php.

Improve usability by adding input validation for:

• Coordinates
• Multiple Coordinates
• Javascript expression
• JSON data input

The auto migrating of the coordinates does not work!

To stay extendable it would be nice if some model properties are automatically set as feature properties.

Not every model property should be there, it would be a huge overload. The data would be available at feature.properties.model.

• Implement an event where extensions can hook in set the properties.
• Make it easy to extend the config and define properties there:

// Add the id value
$GLOBALS['LEAFLET_FEATURE_MODEL_DATA']['marker'][] = 'id';

// Define the intended output
$GLOBALS['LEAFLET_FEATURE_MODEL_DATA']['marker'][] = array('itemList', 'array');

Supported data formats could be:

• array/object do a deserialize and return an array or object
• json data is handles ad json data
• file containing a single file path.
• files containing multiple files as array
• custom Allow any value and pass it to an event dispatcher.

If no alias is given to a layer, creating a new layer is impossible. Alias must be unique, but it is not a required field. Self-filling field (like other alias fields in Contao) would be great.

In addition to the fixed style setting, add others:

• Random style. Get a random style from a specific set of styles.
• Color range. Get a random color in a defined color range.