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Duskmoon UI component library for Phoenix LiveView
Current section
Files
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Current section
Files
lib/phoenix_duskmoon/component/data_entry/file_upload.ex
defmodule PhoenixDuskmoon.Component.DataEntry.FileUpload do
@moduledoc """
File upload component using `el-dm-file-upload` custom element.
Renders a drag-and-drop file upload zone with optional image previews,
file type restrictions, size limits, and multiple file support.
## Examples
<.dm_file_upload accept="image/*" multiple show_preview />
<.dm_file_upload
accept=".pdf,.doc,.docx"
max_size={5_242_880}
max_files={3}
>
Drop documents here
</.dm_file_upload>
"""
use Phoenix.Component
import PhoenixDuskmoon.Component.DataEntry.Form, only: [dm_error: 1]
@doc """
Renders a file upload dropzone using the `el-dm-file-upload` custom element.
## Examples
<.dm_file_upload accept="image/*" multiple />
<.dm_file_upload accept=".pdf" max_size={10_485_760}>
Upload PDF files
</.dm_file_upload>
"""
@doc type: :component
attr(:id, :any, default: nil, doc: "HTML id attribute")
attr(:class, :any, default: nil, doc: "additional CSS classes")
attr(:accept, :string, default: nil, doc: "accepted file types (e.g. \"image/*,.pdf\")")
attr(:multiple, :boolean, default: false, doc: "allow multiple files")
attr(:disabled, :boolean, default: false, doc: "disable the upload")
attr(:max_size, :integer, default: nil, doc: "maximum file size in bytes")
attr(:max_files, :integer, default: nil, doc: "maximum number of files")
attr(:show_preview, :boolean, default: false, doc: "show image previews for selected files")
attr(:compact, :boolean, default: false, doc: "use compact layout")
attr(:size, :string,
default: "md",
values: ["sm", "md", "lg"],
doc: "component size"
)
attr(:name, :string, default: nil, doc: "form field name")
attr(:field, Phoenix.HTML.FormField, doc: "a form field struct retrieved from the form")
attr(:error, :boolean, default: false, doc: "show error state")
attr(:errors, :list, default: [], doc: "list of error messages to display")
attr(:helper, :string, default: nil, doc: "helper text displayed below the component")
attr(:rest, :global)
slot(:inner_block, doc: "Custom dropzone content")
def dm_file_upload(%{field: %Phoenix.HTML.FormField{} = field} = assigns) do
assigns
|> assign(field: nil, id: assigns.id || field.id)
|> assign(:name, field.name)
|> dm_file_upload()
end
def dm_file_upload(assigns) do
~H"""
<div phx-feedback-for={@name}>
<el-dm-file-upload
id={@id}
accept={@accept}
multiple={@multiple}
disabled={@disabled}
aria-disabled={@disabled && "true"}
max-size={@max_size}
max-files={@max_files}
show-preview={@show_preview}
compact={@compact}
size={@size}
class={[(@error || @errors != []) && "file-upload-error", @class]}
aria-invalid={@errors != [] && "true"}
aria-describedby={
(@errors != [] && @id && "#{@id}-errors") ||
(@helper && @errors == [] && @id && "#{@id}-helper")
}
{@rest}
>
{render_slot(@inner_block)}
</el-dm-file-upload>
<span :if={@helper && @errors == []} id={@id && "#{@id}-helper"} class="helper-text">{@helper}</span>
<div :if={@errors != []} id={@id && "#{@id}-errors"}>
<.dm_error :for={msg <- @errors}>{msg}</.dm_error>
</div>
</div>
"""
end
end