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load_geoserver.rb
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load_geoserver.rb
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# frozen_string_literal: true
require 'druid-tools'
module Robots
module DorRepo
module GisDelivery
class LoadGeoserver < Base # rubocop:disable Metrics/ClassLength
def initialize
super('gisDeliveryWF', 'load-geoserver')
end
def perform_work
logger.debug "load-geoserver working on #{bare_druid}"
raise "load-geoserver: #{bare_druid} cannot determine media type" unless GisRobotSuite.media_type(cocina_object)
rights = GisRobotSuite.determine_rights(cocina_object)
# Connect to GeoServer
logger.debug "GeoServer options: #{Settings.geoserver[rights][:primary]}"
connection = Geoserver::Publish::Connection.new(
{
'url' => Settings.geoserver[rights][:primary][:url],
'user' => Settings.geoserver[rights][:primary][:user],
'password' => Settings.geoserver[rights][:primary][:password]
}
)
# Obtain a handle to the workspace
workspace = Geoserver::Publish::Workspace.new(connection)
workspace_name = 'druid'
raise "load-geoserver: #{bare_druid}: No such workspace: #{workspace_name}" unless workspace.find(workspace_name:)
logger.debug "Workspace: #{workspace_name} ready"
if vector?
create_vector(connection, workspace_name)
elsif raster?
create_raster(connection, workspace_name)
else
raise "load-geoserver: #{bare_druid} has unknown layer format: #{layertype}"
end
end
def raster?
@raster ||= GisRobotSuite.raster?(cocina_object)
end
def vector?
@vector ||= GisRobotSuite.vector?(cocina_object)
end
def layertype
@layertype ||= GisRobotSuite.layertype(cocina_object)
end
def title
@title ||= Cocina::Models::Builders::TitleBuilder.full_title(cocina_object.description.title).first
end
def abstract
@abstract ||= cocina_object.description.note.select { |note| note.type == 'abstract' || note.displayLabel&.downcase == 'abstract' }.map(&:value).join("\n")
end
def keywords
@keywords ||= (
cocina_object.description.subject.select { |subject| subject.type == 'topic' } + \
cocina_object.description.subject.select { |subject| subject.type == 'place' })
.map(&:value).compact.uniq
end
def create_vector(connection, workspace_name, datastore_name = 'postgis_druid')
%w[title abstract keywords].each do |field|
raise ArgumentError, "load-geoserver: #{bare_druid}: Layer is missing #{field}" if send(field).empty?
end
logger.debug "Retrieving DataStore: #{workspace_name}/#{datastore_name}"
datastore = Geoserver::Publish::DataStore.new(connection)
raise "load-geoserver: #{bare_druid}: Datastore #{datastore_name} not found" unless datastore.find(workspace_name:, data_store_name: datastore_name)
feature_type_exists = Geoserver::Publish::FeatureType.new(connection).find(
workspace_name:,
data_store_name: datastore_name,
feature_type_name: bare_druid
)
resource_action = case feature_type_exists
when nil
logger.debug "Creating FeatureType #{bare_druid}"
:create
else
logger.debug "Found existing FeatureType #{bare_druid}"
:update
end
feature_type = Struct.new(:enabled, :title, :abstract, :keywords, :metadata_links, :metadata)
ft = feature_type.new
ft.enabled = true
ft.title = title
ft.abstract = abstract
ft.keywords = { string: keywords }
ft.metadata_links = []
ft.metadata = ft.metadata || {}.merge!(
'cacheAgeMax' => 86400,
'cachingEnabled' => true
)
begin
Geoserver::Publish::FeatureType.new(connection).send(
resource_action,
workspace_name:,
data_store_name: datastore_name,
feature_type_name: bare_druid,
title:,
additional_payload: ft.to_h
)
rescue Geoserver::Publish::Error => e
raise "load-geoserver: #{bare_druid} cannot save FeatureType: #{e.message}"
end
end
# rubocop:disable Metrics/AbcSize
def create_raster(connection, workspace_name)
%w[title abstract keywords].each do |field|
raise ArgumentError, "load-geoserver: #{bare_druid}: Layer is missing #{field}" if send(field).empty?
end
# create coverage store
logger.debug "Retrieving CoverageStore: #{workspace_name}/#{bare_druid}"
coverage_store = Geoserver::Publish::CoverageStore.new(connection)
coverage_store_exists = coverage_store.find(
coverage_store_name: bare_druid,
workspace_name:
)
if coverage_store_exists.nil?
logger.debug "Creating CoverageStore: #{workspace_name}/#{bare_druid}"
begin
coverage_store.create(
workspace_name:,
coverage_store_name: bare_druid,
url: "file:#{Settings.geohydra.geotiff.dir}/#{bare_druid}.tif",
type: layertype,
additional_payload: {
description: title
}
)
rescue Geoserver::Publish::Error => e
raise "load-geoserver: #{bare_druid} cannot save CoverageStore: #{e.message}"
end
else
logger.debug "load-geoserver:: #{bare_druid} found existing CoverageStore: #{workspace_name}/#{bare_druid}"
end
# create or update coverage
logger.debug "Retrieving Coverage: #{workspace_name}/#{bare_druid}/#{bare_druid}"
coverage = Geoserver::Publish::Coverage.new(connection)
coverage_exists = coverage.find(
coverage_name: bare_druid,
coverage_store_name: bare_druid,
workspace_name:
)
begin
if coverage_exists.nil?
logger.debug "Creating Coverage #{bare_druid}"
coverage.create(
workspace_name:,
coverage_store_name: bare_druid,
coverage_name: bare_druid,
title:,
additional_payload: coverage_metadata
)
else
logger.debug "Found existing Coverage #{bare_druid}. Updating Coverage."
coverage.update(
workspace_name:,
coverage_store_name: bare_druid,
coverage_name: bare_druid,
title:,
additional_payload: coverage_metadata
)
end
rescue Geoserver::Publish::Error => e
raise "load-geoserver: #{bare_druid} cannot save Coverage: #{e.message}"
end
# determine raster style
begin
raster_style = "raster_#{GisRobotSuite.determine_raster_style("#{Settings.geohydra.geotiff.dir}/#{bare_druid}.tif")}"
rescue StandardError => e
logger.info "Raster style determination failed: #{e.inspect}. Using default `raster`"
raster_style = 'raster'
end
logger.debug "load-geoserver: #{bare_druid} determined raster style as '#{raster_style}'"
style = Geoserver::Publish::Style.new(connection)
# need to create a style if it's a min/max style
if raster_style =~ /^raster_grayscale_(.+)_(.+)$/
min = Regexp.last_match(1).to_f.floor
max = Regexp.last_match(2).to_f.ceil
if max < 2**13 # custom SLD only works with relatively narrow bands
# generate SLD definition
raster_style = "raster_#{bare_druid}"
sldtxt = "
<StyledLayerDescriptor xmlns='http://www.opengis.net/sld'
xmlns:ogc='http://www.opengis.net/ogc'
xmlns:xlink='http://www.w3.org/1999/xlink'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xsi:schemaLocation='http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd'
version='1.0.0'>
<UserLayer>
<Name>raster_layer</Name>
<UserStyle>
<FeatureTypeStyle>
<Rule>
<RasterSymbolizer>
<ColorMap>
<ColorMapEntry color='#000000' quantity='#{min}' opacity='1'/>
<ColorMapEntry color='#FFFFFF' quantity='#{max}' opacity='1'/>
</ColorMap>
</RasterSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</UserLayer>
</StyledLayerDescriptor>"
# create a style with the SLD definition
style_exists = style.find(
style_name: raster_style
)
logger.debug "load-geoserver: #{bare_druid} loaded style #{raster_style}"
if style_exists.nil?
logger.debug "load-geoserver: #{bare_druid} saving new style #{raster_style}"
filename = "#{raster_style}.sld"
style.create(style_name: raster_style, filename:)
style.update(style_name: raster_style, filename:, payload: sldtxt)
end
else
raster_style = 'raster_grayband' # a simple band-oriented histogram adjusted style
style_exists = style.find(
style_name: raster_style
)
raise "load-geoserver: #{bare_druid} has missing style #{raster_style}" if style_exists.nil?
end
else
style_exists = style.find(
style_name: raster_style
)
raise "load-geoserver: #{bare_druid} has missing style #{raster_style}" if style_exists.nil?
end
# fetch layer to load raster style - it's created when the coverage is created via REST API
layer = Geoserver::Publish::Layer.new(connection)
layer_exists = layer.find(layer_name: bare_druid)
raise "load-geoserver: Layer #{bare_druid} is missing for coverage #{workspace_name}/#{bare_druid}/#{bare_druid}" if layer_exists.nil?
return if layer_exists.dig('layer', 'defaultStyle', 'name') == raster_style
layer_exists['layer']['defaultStyle'] = raster_style
logger.debug "load-geoserver: #{bare_druid} updating #{bare_druid} with default style #{raster_style}"
begin
layer.update(layer_name: bare_druid, additional_payload: layer_exists)
rescue Geoserver::Publish::Error => e
raise "load-geoserver: #{bare_druid} cannot save Layer: #{e.message}"
end
end
def coverage_metadata
{ enabled: true,
title:,
abstract:,
keywords: { string: keywords },
metadata_links: [],
metadata: {
cacheAgeMax: 86400,
cachingEnabled: true
} }
end
# rubocop:enable Metrics/AbcSize
end
end
end
end