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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
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library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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CONTENTS OF THIS FILE
---------------------
* Summary
* Requirements
* Installation
* Usage
* Bounding Box Support
* To Do
* Credits
* Current Maintainers
SUMMARY
-------
Views GeoJSON is a style plugin for Views to deliver location-specific data in GeoJSON format, (see GeoJSON spec: http://geojson.org/geojson-spec.html).
Each row is output as a GeoJSON "Features" including geospatial data and optional metadata. All features are wrapped in a "Feature Collection" object.
REQUIREMENTS
------------
Drupal modules:
* Views
* Serialization
* Rest
Optional Drupal modules:
* Geofield 8.x-1.0-alpha2 or greater
INSTALLATION
------------
Install the module as usual.
See https://www.drupal.org/node/1897420 for help installing Drupal 8 modules.
USAGE
-----
1. Create a View with a Feed display on content with geospatial data.
2. Add fields to output a Geofield, longitude & latitude or WKT.
3. Optionally add fields for name and description.
4. Set Format for the display to "GeoJSON Feed".
5. In the "Style options" for this format:
* Choose Map Data Source (Other: Lat/Lon Point, Geofield, etc.)
* Assign the fields that represent Latitude and Longitude.
* Optionally choose fields representing name and description for each point.
* Optionally set a JSONP prefix, (see http://en.wikipedia.org/wiki/JSONP).
* Set the Content-type header to be sent. The default is "application/json",
the standard MIME type for JSON, per http://www.ietf.org/rfc/rfc4627.txt.
6. If using with the OpenLayers module, your new GeoJSON layer will be available
as an Overlay layer on the "Layers & Styles" tab when editing your map.
Bounding Box Filtering
--------------------
GeoJSON views can accept a bounding box as an argument to return only the
points within that box.
It has been tested with OpenLayers' Bounding Box Strategy but should work
with any mapping tool that requests bounding box coordinates as
"?bbox=left,bottom,right,top" in the query string. Argument ID "bbox" is
default for OpenLayers but can be changed.
OpenLayers 7.x-2.x-dev is currently required for OpenLayers BBOX integration.
See OpenLayers issue http://drupal.org/node/1493344, "Support BBOX strategy in
the GeoJSON layer type".
1. Create a GeoJSON view as above in USAGE.
2. Add a layer to OpenLayers of type GeoJSON, at
admin/structure/openlayers/layers/add/openlayers_layer_type_geojson,
specifying the URL to your GeoJSON feed and checking the box for "Use
Bounding Box Strategy".
3. In your GeoJSON View configuration, add a Contextual Filter of type:
"Custom: Bounding box".
4. In the Contextual Filter settings, under "When the filter value is NOT in
the URL as a normal Drupal argument", choose: "Provide default value".
5. In the "Type" dropdown, choose: "Bounding box from query string".
6. For OpenLayers, leave "Query argument ID" as "bbox" and click Apply.
TO DO
-----
* Support addditional GeoJSON feature types like LineString.
* Support an optional altitude coordinate for Point positions.
* Support additional coordinate systems.
CREDITS
-------
This module was originally born from a patch by tmcw to the OpenLayers module
(http://drupal.org/node/889190#comment-3376628) and adapted to model the Views
Datasource module (http://drupal.org/project/views_datasource).
Much of the code is drawn directly from these sources.
CURRENT MAINTAINERS
-------------------
* jeffschuler - http://drupal.org/user/239714

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{
"name": "drupal/views_geojson",
"type": "drupal-module",
"description": "Provides a Views feed style for GeoJSON output",
"keywords": [
"views",
"geojson"
],
"homepage": "https://www.drupal.org/project/views_geojson",
"license": "GPL-2.0-or-later",
"require": {
"php": ">= 7",
"drupal/core": "^8.0 || ^9.0 || ^10.0",
"itamair/geophp": "^1.3"
},
"require-dev": {
"drupol/drupal-conventions": "^1.7"
},
"support": {
"issues": "https://www.drupal.org/project/issues/views_geojson",
"irc": "irc://irc.freenode.org/drupal-contribute",
"source": "http://git.drupal.org/project/views_geojson.git"
}
}

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views.display.geojson_export:
type: views_display_path
label: 'GeoJSON export display options'
views.style.geojson:
type: views_style
label: 'GeoJSON output format'
mapping:
data_source:
type: mapping
label: 'Data Source'
mapping:
value:
type: string
label: 'Map Data Sources'
latitude:
type: string
label: 'Latitude Field'
longitude:
type: string
label: 'Longitude Field'
geofield:
type: string
label: 'Geofield'
geolocation:
type: string
label: 'Geolocation'
wkt:
type: string
label: 'WKT'
name_field:
type: string
label: 'Title Field'
description_field:
type: string
label: 'Description'
jsonp_prefix:
type: string
label: 'JSONP prefix'

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web/modules/views_geojson/src/Plugin/views/argument/BBoxArgument.php Normal file
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<?php
namespace Drupal\views_geojson\Plugin\views\argument;
use Drupal\views\Plugin\views\join\JoinPluginBase;
use Drupal\views\Plugin\views\argument\StringArgument;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Argument handler for Bounding Boxes.
*
* @ingroup views_argument_handlers
*
* @ViewsArgument("views_geojson_bbox_argument")
*/
class BBoxArgument extends StringArgument implements ContainerFactoryPluginInterface {
/**
* @TODO: Is this correct?
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['round_coordinates'] = ['default' => TRUE];
return $options;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$configuration,
$plugin_id,
$plugin_definition
);
}
/**
* {@inheritdoc}
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
parent::buildOptionsForm($form, $form_state);
unset($form['case']);
unset($form['path_case']);
$form['description']['#markup'] .= $this->t('<br><strong>The format should be: <em>"left,bottom,right,top"</em></strong>.');
$form['round_coordinates'] = [
'#type' => 'checkbox',
'#title' => $this->t('Round coordinates'),
'#default_value' => $this->options['title'],
'#description' => $this->t('Round coordinates to two decimal places. This can help in caching bounding box queries. For instance, "-0.542,51.344,-0.367,51.368" and "-0.541,51.343,-0.368,51.369" would use the same SQL query.'),
];
}
/**
* {@inheritdoc}
*
* If we've been passed a bounding box, it's parsable, and the view style
* has a geofield, then we work out which fields to add to the query and add a
* where clause.
*/
public function query($group_by = FALSE) {
if ($bbox = $this->getParsedBoundingBox()) {
$geojson_options = $this->view->getStyle()->options;
$geofield_type = NULL;
$geofield_name = NULL;
if (!empty($geojson_options['data_source']['value'])) {
$geofield_type = $geojson_options['data_source']['value'];
if (!empty($geojson_options['data_source'][$geofield_type])) {
$geofield_name = $geojson_options['data_source'][$geofield_type];
}
}
if (empty($geofield_type) || empty($geofield_name)) {
return;
}
// @todo - get geo_table from field definition?
$geo_table = "node__{$geofield_name}";
if ($geofield_type == 'geolocation') {
$geo_table_entity_id_field = 'entity_id';
$field_lat = "{$geo_table}.field_geolocation_lat";
$field_lng = "{$geo_table}.field_geolocation_lng";
}
elseif ($geofield_type == 'geofield') {
$geo_table_entity_id_field = 'entity_id';
$field_lat = "{$geo_table}.{$geofield_name}_lat";
$field_lng = "{$geo_table}.{$geofield_name}_lon";
}
if (!empty($geo_table)) {
$this->query->ensureTable($geo_table, NULL, new JoinPluginBase([
'table' => $geo_table,
'field' => $geo_table_entity_id_field,
'left_table' => 'node_field_data',
'left_field' => 'nid',
],
NULL, NULL));
}
$this->query->addWhere('bbox', $field_lat, $bbox['bottom'], '>=');
$this->query->addWhere('bbox', $field_lat, $bbox['top'], '<=');
$this->query->addWhere('bbox', $field_lng, $bbox['left'], '>=');
$this->query->addWhere('bbox', $field_lng, $bbox['right'], '<=');
}
}
/**
* Parses the bounding box argument.
*
* Parses the bounding box argument. Returns an array keyed 'top', 'left',
* 'bottom', 'right' or FALSE if the argument was not parsed succesfully.
*
* @return array|bool
* The calculated values.
*/
public function getParsedBoundingBox() {
static $values;
if (!isset($values)) {
$exploded_values = explode(',', $this->getValue());
if (count($exploded_values) == 4) {
$values['left'] = (float) $exploded_values[0];
$values['bottom'] = (float) $exploded_values[1];
$values['right'] = (float) $exploded_values[2];
$values['top'] = (float) $exploded_values[3];
if ($this->options['round_coordinates']) {
$values['left'] -= 0.005;
$values['bottom'] -= 0.005;
$values['right'] += 0.005;
$values['top'] += 0.005;
foreach ($values as $k => $v) {
$values[$k] = round($values[$k], 2);
}
}
}
else {
$values = FALSE;
}
}
return $values;
}
}

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<?php
declare(strict_types = 1);
namespace Drupal\views_geojson\Plugin\views\argument_default;
use Drupal\core\form\FormStateInterface;
use Drupal\views\Plugin\views\argument_default\QueryParameter;
/**
* The BBOX query string argument default handler.
*
* @ingroup views_argument_default_plugins
*
* @ViewsArgumentDefault(
* id="bboxquery",
* title=@Translation("BBox Query"),
* )
*/
class BBoxQuery extends QueryParameter {
/**
* {@inheritdoc}
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
parent::buildOptionsForm($form, $form_state);
$form['info'] = [
'#markup' => '<p class="description">Attempt to pull bounding box info
directly from the query string, bypassing Drupal\'s normal argument
handling. If the argument does not exist, all values will be shown.</p>',
];
$form['arg_id'] = [
'#type' => 'textfield',
'#title' => $this->t('Query argument ID'),
'#size' => 60,
'#maxlength' => 64,
'#default_value' => $this->options['arg_id'] ? $this->options['arg_id'] : $this->t('bbox'),
'#description' => $this->t('The ID of the query argument.<br />For OpenLayers use <em>bbox</em>, (as in "<em>?bbox=left,bottom,right,top</em>".)'),
];
}
/**
* Return the default argument.
*/
public function getArgument() {
$current_request = $this->view->getRequest();
if ($current_request->query->has($this->options['arg_id'])) {
return $current_request->query->get($this->options['arg_id']);
}
// TODO: What should be returned if arg not present, and empty result option
// is set or not ? Otherwise, use the fixed fallback value.
return $this->options['fallback'];
}
/**
* TODO: Determine if this is being implemented correctly.
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['argument'] = ['default' => ''];
$options['arg_id'] = ['default' => 'bbox'];
return $options;
}
}

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web/modules/views_geojson/src/Plugin/views/display/GeoJsonExport.php Normal file
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<?php
namespace Drupal\views_geojson\Plugin\views\display;
use Drupal\rest\Plugin\views\display\RestExport;
/**
* The plugin that handles Data response callbacks for GeoJSON REST resources.
*
* @ingroup views_display_plugins
*
* @ViewsDisplay(
* id = "geojson_export",
* title = @Translation("GeoJSON export"),
* help = @Translation("Create a GeoJSON export resource."),
* uses_route = TRUE,
* admin = @Translation("GeoJSON export"),
* returns_response = TRUE
* )
*/
class GeoJsonExport extends RestExport {
/**
* {@inheritdoc}
*/
protected function defineOptions() {
$options = parent::defineOptions();
// Set the default style plugin to 'geojson'.
$options['style']['contains']['type']['default'] = 'geojson';
$options['row']['contains']['type']['default'] = 'data_field';
return $options;
}
}

636
web/modules/views_geojson/src/Plugin/views/style/GeoJson.php Normal file
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<?php
declare(strict_types = 1);
namespace Drupal\views_geojson\Plugin\views\style;
use Drupal;
use Drupal\Component\Serialization\Json;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Plugin\views\style\StylePluginBase;
use Drupal\views\ResultRow;
use Exception;
use geoPHP;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Serializer\SerializerInterface;
use function count;
use function is_object;
use const JSON_HEX_AMP;
use const JSON_HEX_APOS;
use const JSON_HEX_QUOT;
use const JSON_HEX_TAG;
use const JSON_PRETTY_PRINT;
/**
* Style plugin to render view as GeoJSON code.
*
* @ingroup views_style_plugins
*
* @ViewsStyle(
* id="geojson",
* title=@Translation("GeoJSON"),
* theme="views_view_geojson",
* description=@Translation("Displays field data in GeoJSON data format."),
* display_types={"data"}
* )
*/
class GeoJson extends StylePluginBase {
/**
* The definition.
*
* @var array
*/
public $definition;
/**
* The serializer which serializes the views result.
*
* @var \Symfony\Component\Serializer\Serializer
*/
protected $serializer;
/**
* The module handler.
*
* @var \Drupal\Core\Extension\ModuleHandlerInterface
*/
protected $moduleHandler;
/**
* Overrides \Drupal\views\Plugin\views\style\StylePluginBase::$usesFields.
*
* @var bool
*/
protected $usesFields = TRUE;
/**
* Overrides Drupal\views\Plugin\views\style\StylePluginBase::$usesGrouping.
*
* @var bool
*/
protected $usesGrouping = FALSE;
/**
* Overrides \Drupal\views\Plugin\views\style\StylePluginBase::$usesRowClass.
*
* @var bool
*/
protected $usesRowClass = FALSE;
/**
* Overrides \Drupal\views\Plugin\views\style\StylePluginBase::$usesRowPlugin.
*
* @var bool
*/
protected $usesRowPlugin = FALSE;
/**
* The serializer formats.
*
* @var array
*/
private $formats;
/**
* GeoJson constructor.
*
* @param array $configuration
* The configuration.
* @param string $plugin_id
* The plugin id.
* @param array $plugin_definition
* The plugin definition.
* @param \Symfony\Component\Serializer\SerializerInterface $serializer
* The serializer.
* @param array $serializer_formats
* The serializer formats.
*/
public function __construct(array $configuration, $plugin_id, array $plugin_definition, SerializerInterface $serializer, array $serializer_formats, ModuleHandlerInterface $module_handler) {
parent::__construct($configuration, $plugin_id, $plugin_definition);
$this->definition = $plugin_definition + $configuration;
$this->serializer = $serializer;
$this->formats = ['json', 'html'];
$this->moduleHandler = $module_handler;
}
/**
* {@inheritdoc}
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
parent::buildOptionsForm($form, $form_state);
$fields = [];
$fields_info = [];
// Get list of fields in this view & flag available geodata fields.
$handlers = $this->displayHandler->getHandlers('field');
$field_definition = $this->displayHandler->getOption('fields');
// Check for any fields, as the view needs them.
if (empty($handlers)) {
$form['error_markup'] = [
'#value' => $this->t('You need to enable at least one field before you can configure your field settings'),
'#prefix' => '<div class="error form-item description">',
'#suffix' => '</div>',
];
return;
}
// Go through fields, fill $fields and $fields_info arrays.
foreach ($this->displayHandler->getHandlers('field') as $field_id => $handler) {
$fields[$field_id] = $handler->definition['title'];
$fields_info[$field_id]['type'] = $field_definition[$field_id]['type'];
}
// Default data source.
$data_source_options = [
'latlon' => $this->t('Other: Lat/Lon Point'),
'geofield' => $this->t('Geofield'),
'geolocation' => $this->t('Geolocation'),
'wkt' => $this->t('WKT'),
];
// Data Source options.
$form['data_source'] = [
'#type' => 'fieldset',
'#tree' => TRUE,
'#title' => $this->t('Data Source'),
];
$form['data_source']['value'] = [
'#type' => 'select',
'#multiple' => FALSE,
'#title' => $this->t('Map Data Sources'),
'#description' => $this->t('Choose which sources of data that the map will provide features for.'),
'#options' => $data_source_options,
'#default_value' => $this->options['data_source']['value'],
];
// Other Lat and Lon data sources.
if (count($fields) > 0) {
$form['data_source']['latitude'] = [
'#type' => 'select',
'#title' => $this->t('Latitude Field'),
'#description' => $this->t('Choose a field for Latitude. This should be a field that is a decimal or float value.'),
'#options' => $fields,
'#default_value' => $this->options['data_source']['latitude'],
'#states' => [
'visible' => [
':input[name="style_options[data_source][value]"]' => ['value' => 'latlon'],
],
],
];
$form['data_source']['longitude'] = [
'#type' => 'select',
'#title' => $this->t('Longitude Field'),
'#description' => $this->t('Choose a field for Longitude. This should be a field that is a decimal or float value.'),
'#options' => $fields,
'#default_value' => $this->options['data_source']['longitude'],
'#states' => [
'visible' => [
':input[name="style_options[data_source][value]"]' => ['value' => 'latlon'],
],
],
];
// Get Geofield-type fields.
$geofield_fields = [];
foreach ($fields as $field_id => $field) {
// @TODO We need to check if the field type is `geofield_default`. But
// at the moment this information is missing from the array, due to a
// bug with Geofield 8.x-1.x-dev. When the bug is fixed, we can add a
// check here again.
$geofield_fields[$field_id] = $field;
}
// Geofield.
$form['data_source']['geofield'] = [
'#type' => 'select',
'#title' => $this->t('Geofield'),
'#description' => $this->t("Choose a Geofield field. Any formatter will do; we'll access Geofield's underlying WKT format."),
'#options' => $geofield_fields,
'#default_value' => $this->options['data_source']['geofield'],
'#states' => [
'visible' => [
':input[name="style_options[data_source][value]"]' => ['value' => 'geofield'],
],
],
];
// Get Geofield-type fields.
$geolocation_fields = [];
foreach ($fields as $field_id => $field) {
// @todo - need to limit to just geolocation fields.
$geolocation_fields[$field_id] = $field;
}
// Geolocation.
$form['data_source']['geolocation'] = [
'#type' => 'select',
'#title' => $this->t('Geolocation'),
'#description' => $this->t("Choose a Geolocation field. Any formatter will do; we'll access Geolocation's underlying data storage."),
'#options' => $geolocation_fields,
'#default_value' => $this->options['data_source']['geolocation'],
'#states' => [
'visible' => [
':input[name="style_options[data_source][value]"]' => ['value' => 'geolocation'],
],
],
];
// WKT.
$form['data_source']['wkt'] = [
'#type' => 'select',
'#title' => $this->t('WKT'),
'#description' => $this->t('Choose a WKT format field.'),
'#options' => $fields,
'#default_value' => $this->options['data_source']['wkt'],
'#states' => [
'visible' => [
':input[name="style_options[data_source][value]"]' => ['value' => 'wkt'],
],
],
];
}
$form['data_source']['name_field'] = [
'#type' => 'select',
'#title' => $this->t('Title Field'),
'#description' => $this->t('Choose the field to appear as title on tooltips.'),
'#options' => array_merge(['' => ''], $fields),
'#default_value' => $this->options['data_source']['name_field'],
];
$form['data_source']['description_field'] = [
'#type' => 'select',
'#title' => $this->t('Description'),
'#description' => $this->t('Choose the field or rendering method to appear as
description on tooltips.'),
'#required' => FALSE,
'#options' => array_merge(['' => ''], $fields),
'#default_value' => $this->options['data_source']['description_field'],
];
// Attributes and variable styling description.
$form['attributes'] = [
'#type' => 'fieldset',
'#title' => $this->t('Attributes and Styling'),
'#description' => $this->t('Attributes are field data attached to each feature. This can be used with styling to create Variable styling.'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
];
$form['jsonp_prefix'] = [
'#type' => 'textfield',
'#title' => $this->t('JSONP prefix'),
'#default_value' => $this->options['jsonp_prefix'],
'#description' => $this->t('If used the JSON output will be enclosed with parentheses and prefixed by this label, as in the JSONP format.'),
];
// Make array of attributes.
$variable_fields = [];
// Add name and description.
if (!empty($this->options['data_source']['name_field'])) {
$variable_fields['name'] = '${name}';
}
if (!empty($this->options['data_source']['description_field'])) {
$variable_fields['description'] = '${description}';
}
// Go through fields again to ID variable fields.
// TODO: is it necessary to call getHandlers twice or can we reuse data from
// $fields?
foreach ($this->displayHandler->getHandlers('field') as $field => $handler) {
if (($field !== $this->options['data_source']['name_field']) && ($field !== $this->options['data_source']['description_field'])) {
$variable_fields[$field] = '${' . $field . '}';
}
}
$markup = $this->t('Fields added to this view will be attached to their respective feature, (point, line, polygon,) as attributes.
These attributes can then be used to add variable styling to your themes. This is accomplished by using the %syntax
syntax in the values for a style. The following is a list of formatted variables that are currently available;
these can be placed right in the style interface.', ['%syntax' => '${field_name}']);
$form['attributes']['styling'][''] = [
'#type' => 'html_tag',
'#tag' => 'p',
'#attributes' => [
'class' => [
'description',
],
],
'#markup' => $markup,
];
$form['attributes']['styling'][] = [
'#theme' => 'item_list',
'#items' => $variable_fields,
'#attributes' => ['class' => ['description']],
];
$form['attributes']['styling'][''] = [
'#type' => 'html_tag',
'#tag' => 'p',
'#attributes' => [
'class' => [
'description',
],
],
'#value' => $this->t('Please note that this does not apply to Grouped Displays.'),
];
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$configuration,
$plugin_id,
$plugin_definition,
$container->get('serializer'),
$container->getParameter('serializer.formats'),
$container->get('module_handler')
);
}
/**
* {@inheritdoc}
*/
public function getFormats() {
return ['json', 'html'];
}
/**
* {@inheritdoc}
*/
public function render() {
$features = [
'type' => 'FeatureCollection',
'features' => [],
];
// Get the excluded fields array, common for all rows.
$excluded_fields = $this->getExcludedFields();
// Render each row.
foreach ($this->view->result as $i => $row) {
$this->view->row_index = $i;
if ($feature = $this->renderRow($row, $excluded_fields)) {
$features['features'][] = $feature;
}
}
$this->moduleHandler->alter('geojson_view', $features, $this->view);
unset($this->view->row_index);
if (!empty($this->view->live_preview)) {
// Pretty-print the JSON.
$json = json_encode($features, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT | JSON_PRETTY_PRINT);
}
else {
// Render the collection to JSON using Drupal standard renderer.
$json = Json::encode($features);
}
if (!empty($this->options['jsonp_prefix'])) {
$json = $this->options['jsonp_prefix'] . "({$json})";
}
// Everything else returns output.
return $json;
}
/**
* {@inheritdoc}
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['data_source'] = [
'contains' => [
'value' => ['default' => 'asc'],
'latitude' => ['default' => 0],
'longitude' => ['default' => 0],
'geofield' => ['default' => 0],
'geolocation' => ['default' => 0],
'wkt' => ['default' => 0],
'name_field' => ['default' => 0],
'description_field' => ['default' => 0],
],
];
$options['attributes'] = ['default' => NULL, 'translatable' => FALSE];
$options['jsonp_prefix'] = [
'default' => NULL,
'translatable' => FALSE,
];
return $options;
}
/**
* Retrieves the list of excluded fields due to style plugin configuration.
*
* @return array
* List of excluded fields.
*/
protected function getExcludedFields() {
$data_source = $this->options['data_source'];
$excluded_fields = [
$data_source['name_field'],
$data_source['description_field'],
];
switch ($data_source['value']) {
case 'latlon':
$excluded_fields[] = $data_source['latitude'];
$excluded_fields[] = $data_source['longitude'];
break;
case 'geofield':
$excluded_fields[] = $data_source['geofield'];
break;
case 'geolocation':
$excluded_fields[] = $data_source['geolocation'];
break;
case 'wkt':
$excluded_fields[] = $data_source['wkt'];
break;
}
return array_combine($excluded_fields, $excluded_fields);
}
/**
* Retrieves the description field value.
*
* @param \Drupal\views\ResultRow $row
* The result row.
*
* @return string
* The main field value.
*/
protected function renderDescriptionField(ResultRow $row) {
return $this->renderMainField($row, 'description_field');
}
/**
* Retrieves the main fields values.
*
* @param \Drupal\views\ResultRow $row
* The result row.
* @param string $field_name
* The main field name.
*
* @return string
* The main field value.
*/
protected function renderMainField(ResultRow $row, $field_name) {
if ($this->options['data_source'][$field_name]) {
if (empty($this->view->field[$this->options['data_source'][$field_name]]->view->row_index)) {
$this->view->field[$this->options['data_source'][$field_name]]->view->row_index = $row->index;
}
return $this->view->field[$this->options['data_source'][$field_name]]->advancedRender($row);
}
return '';
}
/**
* Retrieves the name field value.
*
* @param \Drupal\views\ResultRow $row
* The result row.
*
* @return string
* The main field value.
*/
protected function renderNameField(ResultRow $row) {
return $this->renderMainField($row, 'name_field');
}
/**
* Render views fields to GeoJSON.
*
* Takes each field from a row object and renders the field as determined by
* the field's theme.
*
* @param \Drupal\views\ResultRow $row
* Row object.
* @param array $excluded_fields
* Array containing field keys to be excluded.
*
* @throws Exception
*
* @return array
* Array containing all the raw and rendered fields
*/
protected function renderRow(ResultRow $row, array $excluded_fields) {
$feature = ['type' => 'Feature'];
$data_source = $this->options['data_source'];
// Pre-render fields to handle those rewritten with tokens.
foreach ($this->view->field as $field_idx => $field) {
$field->advancedRender($row);
}
switch ($data_source['value']) {
case 'latlon':
$latitude = (string) $this->view->field[$data_source['latitude']]->advancedRender($row);
$longitude = (string) $this->view->field[$data_source['longitude']]->advancedRender($row);
if (!empty($latitude) && !empty($longitude)) {
$feature['geometry'] = [
'type' => 'Point',
'coordinates' => [(float) $longitude, (float) $latitude],
];
}
break;
case 'geofield':
$geofield = $this->view->style_plugin->getFieldValue($row->index, $data_source['geofield']);
if (!empty($geofield)) {
$geometry = Drupal::getContainer()->get('geofield.geophp')->load($geofield);
if (is_object($geometry)) {
$feature['geometry'] = Json::decode($geometry->out('json'));
}
}
break;
case 'geolocation':
$geo_items = $this->view->field[$data_source['geolocation']]->getItems($row);
if (!empty($geo_items[0]['raw'])) {
$raw_geo_item = $geo_items[0]['raw'];
$wkt = "POINT({$raw_geo_item->lng} {$raw_geo_item->lat})";
$geometry = geoPHP::load($wkt, 'wkt');
if (is_object($geometry)) {
$feature['geometry'] = Json::decode($geometry->out('json'));
}
}
break;
case 'wkt':
$wkt = (string) $this->view->field[$data_source['wkt']]->advancedRender($row);
if (!empty($wkt)) {
$wkt = explode(',', $wkt);
$geometry = geoPHP::load($wkt, 'wkt');
if (is_object($geometry)) {
$feature['geometry'] = Json::decode($geometry->out('json'));
}
}
break;
}
// Only add features with geometry data.
if (empty($feature['geometry'])) {
return;
}
// Add the name and description attributes
// as chosen through interface.
$feature['properties']['name'] = $this->renderNameField($row);
$feature['properties']['description'] = $this->renderDescriptionField($row);
// Fill in attributes that are not:
// - Coordinate fields,
// - Name/description (already processed),
// - Views "excluded" fields.
foreach (array_keys($this->view->field) as $id) {
$field = $this->view->field[$id];
if (!isset($excluded_fields[$id]) && !($field->options['exclude'])) {
// Allows you to customize the name of the property by setting a label
// to the field.
$key = empty($field->options['label']) ? $id : $field->options['label'];
$value_rendered = $field->advancedRender($row);
$feature['properties'][$key] = is_numeric($value_rendered) ? (float) $value_rendered : $value_rendered;
}
}
return $feature;
}
}

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web/modules/views_geojson/views_geojson.api.php Normal file
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<?php
/**
* @file
* Hooks related to views_geojson module.
*/
use Drupal\views\ViewExecutable;
/**
* @addtogroup hooks
* @{
*/
/**
* Alter geojson view render array immediately before rendering.
*
* @param array $features
* The array of features.
* @param \Drupal\views\ViewExecutable $view
* The current view.
*/
function hook_geojson_view_alter(array &$features, ViewExecutable $view) {
}
/**
* @} End of "addtogroup hooks".
*/

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web/modules/views_geojson/views_geojson.info.yml Normal file
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name: Views GeoJSON
type: module
description: Provides a Views feed style for GeoJSON output.
core_version_requirement: ^8 || ^9 || ^10
package: Views
dependencies:
- drupal:views
- drupal:serialization
- drupal:rest
# Information added by Drupal.org packaging script on 2022-09-16
version: '8.x-1.2'
project: 'views_geojson'
datestamp: 1663370949

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web/modules/views_geojson/views_geojson.views.inc Normal file
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<?php
/**
* @file
* Views plugin definition.
*/
declare(strict_types = 1);
/**
* Implements hook_views_data().
*
* Adds bounding box contextual filter.
*/
function views_geojson_views_data() {
$data = [];
$data['views']['views_geojson_bbox_argument'] = [
'group' => t('Views GeoJSON'),
'real field' => 'bbox_argument',
'title' => t('Bounding box'),
'help' => t('Limit the results to those within a geospatial bounding box. Can be used in conjunction with Leaflet.'),
'argument' => [
'id' => 'views_geojson_bbox_argument',
'label' => t('Bounding box'),
'empty field name' => '- No value -',
],
];
return $data;
}