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gsinghpal
322
fusion_authorizer_portal/models/pdf_template.py
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322
fusion_authorizer_portal/models/pdf_template.py
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# -*- coding: utf-8 -*-
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# Fusion PDF Template Engine
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# Generic system for filling any funding agency's PDF forms
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import base64
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import logging
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from io import BytesIO
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from odoo import api, fields, models, _
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from odoo.exceptions import UserError
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_logger = logging.getLogger(__name__)
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class FusionPdfTemplate(models.Model):
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_name = 'fusion.pdf.template'
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_description = 'PDF Form Template'
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_order = 'category, name'
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name = fields.Char(string='Template Name', required=True)
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category = fields.Selection([
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('adp', 'ADP - Assistive Devices Program'),
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('mod', 'March of Dimes'),
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('odsp', 'ODSP'),
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('hardship', 'Hardship Funding'),
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('other', 'Other'),
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], string='Funding Agency', required=True, default='adp')
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version = fields.Char(string='Form Version', default='1.0')
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state = fields.Selection([
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('draft', 'Draft'),
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('active', 'Active'),
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('archived', 'Archived'),
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], string='Status', default='draft', tracking=True)
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# The actual PDF template file
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pdf_file = fields.Binary(string='PDF Template', required=True, attachment=True)
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pdf_filename = fields.Char(string='PDF Filename')
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page_count = fields.Integer(
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string='Page Count',
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compute='_compute_page_count',
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store=True,
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)
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# Page preview images for the visual editor
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preview_ids = fields.One2many(
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'fusion.pdf.template.preview', 'template_id',
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string='Page Previews',
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)
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# Field positions configured via the visual editor
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field_ids = fields.One2many(
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'fusion.pdf.template.field', 'template_id',
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string='Template Fields',
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)
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field_count = fields.Integer(
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string='Fields',
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compute='_compute_field_count',
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)
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notes = fields.Text(
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string='Notes',
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help='Usage notes, which assessments/forms use this template',
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)
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def write(self, vals):
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res = super().write(vals)
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if 'pdf_file' in vals and vals['pdf_file']:
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for rec in self:
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try:
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rec.action_generate_previews()
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except Exception as e:
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_logger.warning("Auto preview generation failed for %s: %s", rec.name, e)
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return res
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@api.model_create_multi
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def create(self, vals_list):
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records = super().create(vals_list)
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for rec in records:
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if rec.pdf_file:
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try:
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rec.action_generate_previews()
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except Exception as e:
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_logger.warning("Auto preview generation failed for %s: %s", rec.name, e)
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return records
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@api.depends('pdf_file')
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def _compute_page_count(self):
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for rec in self:
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if rec.pdf_file:
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try:
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from odoo.tools.pdf import PdfFileReader
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pdf_data = base64.b64decode(rec.pdf_file)
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reader = PdfFileReader(BytesIO(pdf_data))
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rec.page_count = reader.getNumPages()
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except Exception as e:
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_logger.warning("Could not read PDF page count: %s", e)
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rec.page_count = 0
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else:
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rec.page_count = 0
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def action_generate_previews(self):
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"""Generate PNG preview images from the PDF using poppler (pdftoppm).
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Falls back gracefully if the PDF is protected or poppler is not available.
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"""
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self.ensure_one()
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if not self.pdf_file:
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raise UserError(_('Please upload a PDF file first.'))
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import subprocess
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import tempfile
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import os
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pdf_data = base64.b64decode(self.pdf_file)
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try:
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with tempfile.TemporaryDirectory() as tmpdir:
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pdf_path = os.path.join(tmpdir, 'template.pdf')
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with open(pdf_path, 'wb') as f:
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f.write(pdf_data)
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# Use pdftoppm to convert each page to PNG
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result = subprocess.run(
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['pdftoppm', '-png', '-r', '200', pdf_path, os.path.join(tmpdir, 'page')],
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capture_output=True, timeout=30,
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)
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if result.returncode != 0:
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stderr = result.stderr.decode('utf-8', errors='replace')
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_logger.warning("pdftoppm failed: %s", stderr)
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raise UserError(_(
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'Could not generate previews automatically. '
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'The PDF may be protected. Please upload preview images manually '
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'in the Page Previews tab (screenshots of each page).'
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))
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# Find generated PNG files
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png_files = sorted([
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f for f in os.listdir(tmpdir)
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if f.startswith('page-') and f.endswith('.png')
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])
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if not png_files:
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raise UserError(_('No pages were generated. Please upload preview images manually.'))
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# Delete existing previews
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self.preview_ids.unlink()
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# Create preview records
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for idx, png_file in enumerate(png_files):
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png_path = os.path.join(tmpdir, png_file)
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with open(png_path, 'rb') as f:
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image_data = base64.b64encode(f.read())
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self.env['fusion.pdf.template.preview'].create({
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'template_id': self.id,
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'page': idx + 1,
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'image': image_data,
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'image_filename': f'page_{idx + 1}.png',
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})
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_logger.info("Generated %d preview images for template %s", len(png_files), self.name)
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except subprocess.TimeoutExpired:
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raise UserError(_('PDF conversion timed out. Please upload preview images manually.'))
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except FileNotFoundError:
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raise UserError(_(
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'poppler-utils (pdftoppm) is not installed on the server. '
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'Please upload preview images manually in the Page Previews tab.'
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))
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@api.depends('field_ids')
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def _compute_field_count(self):
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for rec in self:
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rec.field_count = len(rec.field_ids)
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def action_activate(self):
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"""Set template to active."""
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self.ensure_one()
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if not self.pdf_file:
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raise UserError(_('Please upload a PDF file before activating.'))
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self.state = 'active'
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def action_archive(self):
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"""Archive the template."""
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self.ensure_one()
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self.state = 'archived'
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def action_reset_draft(self):
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"""Reset to draft."""
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self.ensure_one()
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self.state = 'draft'
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def action_open_field_editor(self):
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"""Open the visual field position editor."""
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self.ensure_one()
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return {
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'type': 'ir.actions.act_url',
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'url': f'/fusion/pdf-editor/{self.id}',
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'target': 'new',
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}
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def generate_filled_pdf(self, context_data, signatures=None):
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"""Generate a filled PDF using this template and the provided data.
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Args:
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context_data: flat dict of {field_key: value}
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signatures: dict of {field_key: binary_png} for signature fields
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Returns:
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bytes of the filled PDF
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"""
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self.ensure_one()
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if not self.pdf_file:
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raise UserError(_('Template has no PDF file.'))
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if self.state != 'active':
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_logger.warning("Generating PDF from non-active template %s", self.name)
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from ..utils.pdf_filler import PDFTemplateFiller
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template_bytes = base64.b64decode(self.pdf_file)
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# Build fields_by_page dict
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fields_by_page = {}
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for field in self.field_ids.filtered(lambda f: f.is_active):
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page = field.page
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if page not in fields_by_page:
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fields_by_page[page] = []
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fields_by_page[page].append({
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'field_name': field.name,
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'field_key': field.field_key or field.name,
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'pos_x': field.pos_x,
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'pos_y': field.pos_y,
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'width': field.width,
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'height': field.height,
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'field_type': field.field_type,
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'font_size': field.font_size,
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'font_name': field.font_name or 'Helvetica',
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})
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return PDFTemplateFiller.fill_template(
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template_bytes, fields_by_page, context_data, signatures
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)
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class FusionPdfTemplatePreview(models.Model):
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_name = 'fusion.pdf.template.preview'
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_description = 'PDF Template Page Preview'
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_order = 'page'
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template_id = fields.Many2one(
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'fusion.pdf.template', string='Template',
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required=True, ondelete='cascade', index=True,
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)
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page = fields.Integer(string='Page Number', required=True, default=1)
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image = fields.Binary(string='Page Image (PNG)', attachment=True)
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image_filename = fields.Char(string='Image Filename')
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class FusionPdfTemplateField(models.Model):
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_name = 'fusion.pdf.template.field'
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_description = 'PDF Template Field'
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_order = 'page, sequence'
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template_id = fields.Many2one(
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'fusion.pdf.template', string='Template',
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required=True, ondelete='cascade', index=True,
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)
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name = fields.Char(
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string='Field Name', required=True,
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help='Internal identifier, e.g. client_last_name',
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)
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label = fields.Char(
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string='Display Label',
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help='Human-readable label shown in the editor, e.g. "Last Name"',
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)
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sequence = fields.Integer(string='Sequence', default=10)
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page = fields.Integer(string='Page', default=1, required=True)
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# Percentage-based positioning (0.0 to 1.0) -- same as sign.item
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pos_x = fields.Float(
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string='Position X', digits=(4, 3),
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help='Horizontal position as ratio (0.0 = left edge, 1.0 = right edge)',
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)
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pos_y = fields.Float(
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string='Position Y', digits=(4, 3),
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help='Vertical position as ratio (0.0 = top edge, 1.0 = bottom edge)',
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)
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width = fields.Float(
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string='Width', digits=(4, 3), default=0.150,
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help='Width as ratio of page width',
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)
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height = fields.Float(
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string='Height', digits=(4, 3), default=0.015,
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help='Height as ratio of page height',
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)
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# Rendering settings
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field_type = fields.Selection([
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('text', 'Text'),
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('checkbox', 'Checkbox'),
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('signature', 'Signature Image'),
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('date', 'Date'),
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], string='Field Type', default='text', required=True)
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font_size = fields.Float(string='Font Size', default=10.0)
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font_name = fields.Selection([
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('Helvetica', 'Helvetica'),
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('Courier', 'Courier'),
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('Times-Roman', 'Times Roman'),
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], string='Font', default='Helvetica')
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# Data mapping
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field_key = fields.Char(
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string='Data Key',
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help='Key to look up in the data context dict.\n'
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'Examples: client_last_name, client_health_card, consent_date, signature_page_11\n'
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'The generating code passes a flat dict of all available data.',
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)
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default_value = fields.Char(
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string='Default Value',
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help='Fallback value if field_key returns empty',
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)
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is_active = fields.Boolean(string='Active', default=True)
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