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GSLayerGroup.R
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GSLayerGroup.R
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#' Geoserver REST API LayerGroup
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#'
#' @name GSLayerGroup
#' @title A GeoServer layergroup resource
#' @description This class models a GeoServer layer group. This class is to be
#' used for clustering layers into a group.
#' @keywords geoserver rest api resource featureType coverage layer layer group
#' @return Object of \code{\link{R6Class}} for modelling a GeoServer layergroup
#' @format \code{\link{R6Class}} object.
#'
#' @examples
#' lyr <- GSLayerGroup$new()
#'
#' @author Emmanuel Blondel <emmanuel.blondel1@@gmail.com>
#'
GSLayerGroup <- R6Class("GSLayerGroup",
inherit = GSRESTResource,
public = list(
#'@field full full
full = TRUE,
#'@field name name
name = NULL,
#'@field mode mode
mode = NULL,
#'@field title title
title = NULL,
#'@field abstractTxt abstract
abstractTxt = NULL,
#'@field workspace workspace
workspace = NULL,
#'@field publishables publishables
publishables = list(),
#'@field styles styles
styles = list(),
#'@field metadataLinks metadata links
metadataLinks = list(),
#'@field bounds bounds
bounds = list(minx = NA, miny = NA, maxx = NA, maxy = NA, crs = NA),
#'@description Initializes an object of class \link{GSLayerGroup}
#'@param xml object of class \link{xml_node-class}
initialize = function(xml = NULL){
super$initialize(rootName = "layerGroup")
if(!missing(xml) & !is.null(xml)){
self$decode(xml)
}
},
#'@description Decodes from XML
#'@param xml object of class \link{xml_node-class}
decode = function(xml){
xml = xml2::as_xml_document(xml)
self$name <- xml2::xml_find_first(xml, "//name") %>% xml2::xml_text()
if(self$full){
titles <- xml2::xml_find_first(xml, "//title")
if(length(titles)>0) self$title <- xml2::xml_text(titles)
abstracts <- xml2::xml_find_first(xml, "//abstractTxt")
if(length(abstracts)>0) self$abstractTxt <- xml2::xml_text(abstracts)
modes <- xml2::xml_find_first(xml, "//mode")
if(length(modes)>0) self$mode <- xml2::xml_text(modes)
workspaces <- xml2::xml_find_first(xml, "//workspace")
if(length(workspaces)>0){
self$workspace <- GSWorkspace$new(name = xml2::xml_text(workspaces))
}
#publishables
publishables <- as(xml2::xml_find_all(xml, "//publishables/published"), "list")
if(length(publishables)>0){
self$publishables <- lapply(publishables, GSPublishable$new)
}
#styles
styles <- as(xml2::xml_find_all(xml, "//styles/style"), "list")
if(length(styles)>0){
styles <- lapply(styles, GSStyle$new)
self$setStyles(styles)
}
#metadataLinks
metadataLinksXML <- as(xml2::xml_find_all(xml, "//metadataLinks/metadataLink"), "list")
if(length(metadataLinksXML)>0){
for(metadataLinkXML in metadataLinksXML){
md <- GSMetadataLink$new(xml = metadataLinkXML)
self$addMetadataLink(md)
}
}
#bounds
boundsXML <- as(xml2::xml_find_all(xml, "//bounds/*"), "list")
self$bounds <- lapply(boundsXML, xml2::xml_text)
names(self$bounds) <- lapply(boundsXML, xml2::xml_name)
}
},
#'@description Set name
#'@param name name
setName = function(name){
self$name = name
},
#'@description Set mode
#'@param mode a mode value among "SINGLE", "NAMED", "CONTAINER", "EO"
setMode = function(mode){
allowedModes <- c("SINGLE", "NAMED", "CONTAINER", "EO")
if(!(mode %in% allowedModes)){
stop(sprintf("Mode should one among values [%s]", paste(allowedModes, collapse=",")))
}
self$mode = mode
},
#'@description Set title
#'@param title title
setTitle = function(title){
self$title = title
},
#'@description Set abstract
#'@param abstract abstract
setAbstract = function(abstract){
self$abstractTxt = abstract
},
#'@description Set workspace
#'@param workspace workspace name, object of class \link{GSWorkspace} or \code{character}
setWorkspace = function(workspace){
if(!is(workspace, "GSWorkspace")){
workspace <- GSWorkspace$new(name = workspace)
}
self$workspace = workspace
},
#'@description Adds layer
#'@param layer layer name
#'@param style style name
addLayer = function(layer, style){
ps <- GSPublishable$new(name = layer, type = "layer")
self$addPublishable(ps)
self$addStyle(style)
},
#'@description Adds layer group
#'@param layerGroup layer group
addLayerGroup = function(layerGroup){
ps <- GSPublishable$new(name = layer, type = "layerGroup")
self$addPublishable(ps)
self$addStyle(NA)
},
#'@description Adds publishable
#'@param publishable publishable
#'@return \code{TRUE} if added, \code{FALSE} otherwise
addPublishable = function(publishable){
startNb = length(self$publishables)
add <- TRUE
invisible(sapply(self$publishables, function(x){
if(publishable$name == x$name & publishable$attr_type == x$attr_type){
add <<- FALSE
}
}))
if(add){
self$publishables = c(self$publishables, publishable)
}
endNb = length(self$publishables)
return(endNb == startNb+1)
},
#'@description Set styles
#'@param styles styles
setStyles = function(styles){
if(!is.list(styles)) styles = list(styles)
self$styles = styles
return(TRUE)
},
#'@description Adds a style
#'@param style style
#'@return \code{TRUE} if added, \code{FALSE} otherwise
addStyle = function(style){
if(is(style, "character")) style <- GSStyle$new(xml=NULL, name = style)
startNb = length(self$styles)
self$styles = c(self$styles, style)
endNb = length(self$styles)
return(endNb == startNb+1)
},
#'@description Set metadata links
#'@param metadataLinks metadata links
setMetadataLinks = function(metadataLinks){
self$metadataLinks <- metadataLinks
},
#'@description Adds metadata link
#'@param metadataLink object of class \link{GSMetadataLink}
#'@return \code{TRUE} if added, \code{FALSE} otherwise
addMetadataLink = function(metadataLink){
startNb = length(self$metadataLinks)
links <- lapply(self$metadataLinks, function(x){x$content})
if(length(which(links == metadataLink$content)) == 0){
self$metadataLinks = c(self$metadataLinks, metadataLink)
}
endNb = length(self$metadataLinks)
return(endNb == startNb+1)
},
#'@description Deletes metadata link
#'@param metadataLink object of class \link{GSMetadataLink}
#'@return \code{TRUE} if deleted, \code{FALSE} otherwise
deleteMetadataLink = function(metadataLink){
startNb = length(self$metadataLinks)
links <- lapply(self$metadataLinks, function(x){x$content})
self$metadataLinks = self$metadataLinks[which(links != metadataLink$content)]
endNb = length(self$metadataLinks)
return(endNb == startNb-1)
},
#'@description Set bounds
#'@param minx minx
#'@param miny miny
#'@param maxx maxx
#'@param maxy maxy
#'@param bbox bbox
#'@param crs crs
setBounds = function(minx, miny, maxx, maxy, bbox = NULL, crs){
self$bounds <- GSUtils$setBbox(minx, miny, maxx, maxy, bbox, crs)
}
)
)