Add /admin/labels/dymo
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Vunz4VLxAYDBnU5tLciLDC
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"""
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Dymo LabelWriter printing - admin only.
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The tape printer does one label at a time on a continuous roll. A
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LabelWriter does die-cut stock, so several drawer labels are ganged onto
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one sticker and you cut them apart. Same drawer labels, same 40 x 15mm
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house size, different carrier.
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Routes (all under /admin/labels/dymo):
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/ choose labels, pick the stock, see the sheet
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/preview.png one rendered sticker
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/download.pdf the print-ready PDF, page size = the stock size
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There is no direct printing here on purpose: the LabelWriter 4XL is a USB
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printer, not a network one, so the PDF goes through whatever driver the
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machine already has. Print at 100% / Actual size.
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Created by: Jess Rogerson (yelling commands at Claude.AI)
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"""
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import logging
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from flask import (Blueprint, abort, current_app, flash, redirect,
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render_template, request, send_file, url_for)
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from flask_login import login_required
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from app.models.site_setting import SiteSetting
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from app.routes.admin import admin_required
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from app.routes.labels_tape import _group_spec, _selected_labels
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from app.services import dymo_sheet, tape_printer
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logger = logging.getLogger(__name__)
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dymo_bp = Blueprint('dymo', __name__, url_prefix='/admin/labels/dymo')
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def _tape_options(source):
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"""What goes ON each drawer label - shared with tape printing, so a
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label looks the same whichever printer it comes off."""
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options = tape_printer.options_from_form(
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source,
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size_default=SiteSetting.get('tape_size_mode',
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tape_printer.DEFAULT_SIZE_MODE))
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# 'Fit the tape width' is meaningless on die-cut stock: there is no
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# tape to fit. Fall back to the house sizes.
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if not options.is_fixed:
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options.size_mode = tape_printer.DEFAULT_SIZE_MODE
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return options
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def _query(sheet, options, labels, group_spec=None):
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"""Every option as query args, so preview images and the PDF link show
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exactly what the page shows."""
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query = {
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'ids': ','.join(str(l.id) for l in labels),
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tape_printer.FORM_MARKER: '1',
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'stock': sheet.stock,
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'layout': sheet.layout,
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'margin_mm': sheet.margin_mm,
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'gap_mm': sheet.gap_mm,
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'start_at': sheet.start_at,
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'size_mode': options.size_mode,
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'copies': options.copies,
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'font_scale': options.font_scale,
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'image_percent': options.image_percent,
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'padding_mm': options.padding_mm,
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'align': options.align,
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'fields': options.fields,
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}
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for name, on in (('cut_guides', sheet.cut_guides),
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('centre', sheet.centre),
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('monochrome', sheet.monochrome),
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('group_drawers', options.group_drawers),
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('outline', options.outline)):
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if on:
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query[name] = '1'
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if group_spec:
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query['groups'] = group_spec
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return query
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@dymo_bp.route('/', methods=['GET', 'POST'])
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@login_required
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@admin_required
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def index():
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labels = _selected_labels()
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if not labels:
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flash('Select some labels to print first.', 'warning')
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return redirect(url_for('labels.index'))
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source = request.form if request.method == 'POST' else request.args
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options = _tape_options(source)
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sheet = dymo_sheet.sheet_options_from_form(
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source, stock_default=SiteSetting.get('dymo_stock',
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dymo_sheet.DEFAULT_STOCK))
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group_spec = _group_spec()
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plan = tape_printer.plan_groups(labels, options, group_spec)
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pages = dymo_sheet.plan_sheets(plan, sheet, copies=options.copies)
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per_sheet, cols, rows = dymo_sheet.capacity(sheet)
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return render_template(
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'admin/labels/dymo.html',
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labels=labels,
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plan=plan,
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pages=pages,
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ids=','.join(str(l.id) for l in labels),
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options=options,
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sheet=sheet,
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stocks=dymo_sheet.STOCKS,
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stock=dymo_sheet.get_stock(sheet.stock),
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layouts=dymo_sheet.LAYOUTS,
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size_modes=[(key, text) for key, text in tape_printer.SIZE_MODES
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if key in tape_printer.FIXED_MODES],
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per_sheet=per_sheet,
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grid=f'{cols} across, {rows} down',
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query=_query(sheet, options, labels, group_spec),
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field_options=[
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('image', 'Part image'), ('name', 'Part name'),
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('dimensions', 'Dimensions'), ('part_number', 'Part number'),
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('alt_numbers', 'Alternate numbers'), ('category', 'Category'),
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('category_code', 'Category code'), ('location', 'Drawer'),
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('colour', 'Colour name'), ('accent', 'Colour stripe'),
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],
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)
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def _rendered_pages():
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"""The sticker images for the current request's options."""
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labels = _selected_labels()
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if not labels:
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abort(400, 'No labels selected.')
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options = _tape_options(request.args)
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sheet = dymo_sheet.sheet_options_from_form(request.args)
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plan = tape_printer.plan_groups(labels, options, _group_spec())
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return dymo_sheet.render_pages(
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plan, sheet, options, current_app.config['UPLOAD_FOLDER'],
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copies=options.copies)
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@dymo_bp.route('/preview.png')
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@login_required
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@admin_required
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def preview():
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"""One sticker, scaled for the screen."""
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pages = _rendered_pages()
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index_ = request.args.get('page', type=int) or 1
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if index_ < 1 or index_ > len(pages):
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abort(404)
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return send_file(dymo_sheet.preview_png(pages[index_ - 1]),
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mimetype='image/png')
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@dymo_bp.route('/download.pdf', methods=['GET', 'POST'])
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@login_required
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@admin_required
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def download_pdf():
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"""The print-ready PDF: one page per sticker, exactly the stock size."""
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labels = _selected_labels()
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if not labels:
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flash('Nothing selected.', 'warning')
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return redirect(url_for('labels.index'))
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source = request.form if request.method == 'POST' else request.args
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options = _tape_options(source)
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sheet = dymo_sheet.sheet_options_from_form(source)
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plan = tape_printer.plan_groups(labels, options, _group_spec())
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buffer = dymo_sheet.render_pdf(
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plan, sheet, options, current_app.config['UPLOAD_FOLDER'],
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copies=options.copies)
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if buffer is None:
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flash('Nothing to render.', 'warning')
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return redirect(url_for('labels.index'))
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stock = dymo_sheet.get_stock(sheet.stock)
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# Truncated, not rounded: 101.6mm stock is sold as "101 x 54".
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name = f'lego-labels-{int(stock.width_mm)}x{int(stock.height_mm)}mm.pdf'
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return send_file(buffer, mimetype='application/pdf', as_attachment=True,
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download_name=name)
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