first draft for future wordclim climate

src/worldclim/future.jl

@@ -0,0 +1,83 @@
+const WORLDCLIM_URI_CMIP6 = URI(scheme="https", host="geodata.ucdavis.edu", path="/cmip6")
+
+layers(::Type{<:WorldClim{<:Future{Climate}}}) = (:tmin, :tmax, :prec)
+getraster_keywords(::Type{<:WorldClim{<:Future{Climate}}}) = (:date, :res)
+
+
+function getraster(T::Type{<:WorldClim{<:Future{Climate, CMIP6}}}, layers::Union{Tuple,Symbol}; 
+    res::String=defres(T), date
+)
+    _getraster(T, layers, res, date)
+end
+
+
+function _getraster(T::Type{<:WorldClim{<:Future{Climate}}}, layer::Symbol, res::String, date)
+    #date_str = _date_string(T, date)
+    _check_layer(T, layer)
+    _check_res(T, res)
+    raster_path = rasterpath(T, layer; res, date)
+    if !isfile(raster_path)
+        _maybe_download(rasterurl(T, layer; res, date), raster_path)
+    end
+    return raster_path
+end
+
+function rasterurl(T::Type{<:WorldClim{<:Future{Climate, CMIP6, M, S}}}, layer; res, date) where {M, S}
+    joinpath(WORLDCLIM_URI_CMIP6, res, _format(WorldClim, M), _format(CHELSA, S), rastername(T, layer; res, date))
+end
+
+function rastername(T::Type{<:WorldClim{<:Future{Climate, CMIP6, M, S}}}, layer; res, date) where {M, S}
+    join(["wc2.1", res, string(layer), _format(WorldClim, M), _format(CHELSA, S), date], "_") * ".tif"
+end
+
+
+function _date_string(::Type{<:WorldClim{<:Future{Climate, CMIP6}}}, date)
+    if date < DateTime(2021)
+        _cmip6_date_error(date)
+    elseif date < DateTime(2041)
+        "2011-2040"
+    elseif date < DateTime(2061)
+        "2041-2060"
+    elseif date < DateTime(2081)
+        "2041-2080"
+    elseif date < DateTime(2101)
+        "2081-2100"
+    else
+        _cmip6_date_error(date)
+    end
+end
+
+const WORDCLIM_CMIP6_MODEL_STRINGS = [
+    "ACCESS-CM2"
+    "BCC-CSM2-MR"
+    "CMCC-ESM2"
+    "EC-Earth3-Veg"
+    "FIO-ESM-2-0"
+    "GFDL-ESM4"
+    "GISS-E2-1-G"
+    "HadGEM3-GC31-LL"
+    "INM-CM5-0"
+    "IPSL-CM6A-LR"
+    "MIROC6"
+    "MPI-ESM1-2-HR"
+    "MRI-ESM2-0"
+    "UKESM1-0-LL"
+]
+
+WORDCLIM_CMIP6_MODELS = Type{<:ClimateModel{CMIP6}}[]
+
+for model_str in WORDCLIM_CMIP6_MODEL_STRINGS
+    type = Symbol(replace(model_str, "-" => "_"))
+    @eval begin
+        export $type
+        if !(@isdefined $type) 
+            struct $type <: ClimateModel{CMIP6} end
+            export $type
+        end
+        push!(WORDCLIM_CMIP6_MODELS, $type)
+        _format(::Type{WorldClim}, ::Type{$type}) = $model_str
+    end
+end
+
+append!(CMIP6_MODELS, WORDCLIM_CMIP6_MODELS)
+unique!(CMIP6_MODELS)