forked from ScoDoc/ScoDoc
316 lines
11 KiB
Python
316 lines
11 KiB
Python
# -*- mode: python -*-
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# -*- coding: utf-8 -*-
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##############################################################################
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#
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# Gestion scolarite IUT
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#
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# Copyright (c) 1999 - 2021 Emmanuel Viennet. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Emmanuel Viennet emmanuel.viennet@gmail.com
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#
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##############################################################################
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"""Génération des bulletins de note: super-classe pour les générateurs (HTML et PDF)
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class BulletinGenerator:
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description
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supported_formats = [ 'pdf', 'html' ]
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.bul_title_pdf()
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.bul_table(format)
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.bul_part_below(format)
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.bul_signatures_pdf()
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.__init__ et .generate(format) methodes appelees par le client (sco_bulletin)
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La préférence 'bul_class_name' donne le nom de la classe generateur.
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La préférence 'bul_pdf_class_name' est obsolete (inutilisée).
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"""
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import collections
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import io
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import time
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import traceback
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import reportlab
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from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Frame, PageBreak
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from reportlab.platypus import Table, TableStyle, Image, KeepInFrame
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from flask import request
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from flask_login import current_user
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from app.scodoc import sco_utils as scu
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from app.scodoc.sco_exceptions import NoteProcessError
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from app import log
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from app.scodoc import sco_formsemestre
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from app.scodoc import sco_pdf
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from app.scodoc.sco_pdf import PDFLOCK
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import sco_version
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# Liste des types des classes de générateurs de bulletins PDF:
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BULLETIN_CLASSES = collections.OrderedDict()
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def register_bulletin_class(klass):
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BULLETIN_CLASSES[klass.__name__] = klass
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def bulletin_class_descriptions():
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return [x.description for x in BULLETIN_CLASSES.values()]
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def bulletin_class_names():
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return list(BULLETIN_CLASSES.keys())
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def bulletin_default_class_name():
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return bulletin_class_names()[0]
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def bulletin_get_class(class_name):
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return BULLETIN_CLASSES[class_name]
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def bulletin_get_class_name_displayed(formsemestre_id):
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"""Le nom du générateur utilisé, en clair"""
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from app.scodoc import sco_preferences
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bul_class_name = sco_preferences.get_preference("bul_class_name", formsemestre_id)
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try:
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gen_class = bulletin_get_class(bul_class_name)
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return gen_class.description
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except:
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return "invalide ! (voir paramètres)"
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class BulletinGenerator(object):
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"Virtual superclass for PDF bulletin generators" ""
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# Here some helper methods
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# see sco_bulletins_standard.BulletinGeneratorStandard subclass for real methods
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supported_formats = [] # should list supported formats, eg [ 'html', 'pdf' ]
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description = "superclass for bulletins" # description for user interface
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def __init__(
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self,
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infos,
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authuser=None,
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version="long",
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filigranne=None,
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server_name=None,
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):
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from app.scodoc import sco_preferences
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if not version in scu.BULLETINS_VERSIONS:
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raise ValueError("invalid version code !")
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self.infos = infos
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self.authuser = authuser # nécessaire pour version HTML qui contient liens dépendant de l'utilisateur
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self.version = version
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self.filigranne = filigranne
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self.server_name = server_name
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# Store preferences for convenience:
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formsemestre_id = self.infos["formsemestre_id"]
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self.preferences = sco_preferences.SemPreferences(formsemestre_id)
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self.diagnostic = None # error message if any problem
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# Common PDF styles:
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# - Pour tous les champs du bulletin sauf les cellules de table:
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self.FieldStyle = reportlab.lib.styles.ParagraphStyle({})
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self.FieldStyle.fontName = self.preferences["SCOLAR_FONT_BUL_FIELDS"]
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self.FieldStyle.fontSize = self.preferences["SCOLAR_FONT_SIZE"]
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self.FieldStyle.firstLineIndent = 0
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# - Pour les cellules de table:
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self.CellStyle = reportlab.lib.styles.ParagraphStyle({})
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self.CellStyle.fontSize = self.preferences["SCOLAR_FONT_SIZE"]
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self.CellStyle.fontName = self.preferences["SCOLAR_FONT"]
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self.CellStyle.leading = (
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1.0 * self.preferences["SCOLAR_FONT_SIZE"]
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) # vertical space
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# Marges du document PDF
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self.margins = (
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self.preferences["left_margin"],
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self.preferences["top_margin"],
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self.preferences["right_margin"],
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self.preferences["bottom_margin"],
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)
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def get_filename(self):
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"""Build a filename to be proposed to the web client"""
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sem = sco_formsemestre.get_formsemestre(self.infos["formsemestre_id"])
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return scu.bul_filename(sem, self.infos["etud"], "pdf")
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def generate(self, format="", stand_alone=True):
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"""Return bulletin in specified format"""
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if not format in self.supported_formats:
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raise ValueError("unsupported bulletin format (%s)" % format)
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try:
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PDFLOCK.acquire() # this lock is necessary since reportlab is not re-entrant
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if format == "html":
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return self.generate_html()
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elif format == "pdf":
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return self.generate_pdf(stand_alone=stand_alone)
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else:
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raise ValueError("invalid bulletin format (%s)" % format)
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finally:
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PDFLOCK.release()
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def generate_html(self):
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"""Return bulletin as an HTML string"""
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H = ['<div class="notes_bulletin">']
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# table des notes:
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H.append(self.bul_table(format="html")) # pylint: disable=no-member
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# infos sous la table:
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H.append(self.bul_part_below(format="html")) # pylint: disable=no-member
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H.append("</div>")
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return "\n".join(H)
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def generate_pdf(self, stand_alone=True):
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"""Build PDF bulletin from distinct parts
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Si stand_alone, génère un doc PDF complet et renvoie une string
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Sinon, renvoie juste une liste d'objets PLATYPUS pour intégration
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dans un autre document.
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"""
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from app.scodoc import sco_preferences
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formsemestre_id = self.infos["formsemestre_id"]
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# partie haute du bulletin
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objects = self.bul_title_pdf() # pylint: disable=no-member
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# table des notes
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objects += self.bul_table(format="pdf") # pylint: disable=no-member
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# infos sous la table
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objects += self.bul_part_below(format="pdf") # pylint: disable=no-member
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# signatures
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objects += self.bul_signatures_pdf() # pylint: disable=no-member
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# Réduit sur une page
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objects = [KeepInFrame(0, 0, objects, mode="shrink")]
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#
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if not stand_alone:
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objects.append(PageBreak()) # insert page break at end
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return objects
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else:
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# Generation du document PDF
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sem = sco_formsemestre.get_formsemestre(formsemestre_id)
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report = io.BytesIO() # in-memory document, no disk file
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document = sco_pdf.BaseDocTemplate(report)
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document.addPageTemplates(
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sco_pdf.ScolarsPageTemplate(
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document,
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author="%s %s (E. Viennet) [%s]"
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% (sco_version.SCONAME, sco_version.SCOVERSION, self.description),
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title="Bulletin %s de %s"
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% (sem["titremois"], self.infos["etud"]["nomprenom"]),
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subject="Bulletin de note",
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margins=self.margins,
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server_name=self.server_name,
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filigranne=self.filigranne,
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preferences=sco_preferences.SemPreferences(formsemestre_id),
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)
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)
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document.build(objects)
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data = report.getvalue()
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return data
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def buildTableObject(self, P, pdfTableStyle, colWidths):
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"""Utility used by some old-style generators.
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Build a platypus Table instance from a nested list of cells, style and widths.
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P: table, as a list of lists
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PdfTableStyle: commandes de style pour la table (reportlab)
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"""
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try:
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# put each table cell in a Paragraph
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Pt = [
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[Paragraph(sco_pdf.SU(x), self.CellStyle) for x in line] for line in P
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]
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except:
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# enquête sur exception intermittente...
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log("*** bug in PDF buildTableObject:")
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log("P=%s" % P)
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# compris: reportlab is not thread safe !
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# see http://two.pairlist.net/pipermail/reportlab-users/2006-June/005037.html
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# (donc maintenant protégé dans ScoDoc par un Lock global)
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self.diagnostic = "erreur lors de la génération du PDF<br/>"
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self.diagnostic += "<pre>" + traceback.format_exc() + "</pre>"
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return []
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return Table(Pt, colWidths=colWidths, style=pdfTableStyle)
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# ---------------------------------------------------------------------------
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def make_formsemestre_bulletinetud(
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infos,
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version="long", # short, long, selectedevals
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format="pdf", # html, pdf
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stand_alone=True,
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):
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"""Bulletin de notes
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Appelle une fonction générant le bulletin au format spécifié à partir des informations infos,
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selon les préférences du semestre.
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"""
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from app.scodoc import sco_preferences
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if not version in scu.BULLETINS_VERSIONS:
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raise ValueError("invalid version code !")
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formsemestre_id = infos["formsemestre_id"]
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bul_class_name = sco_preferences.get_preference("bul_class_name", formsemestre_id)
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try:
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gen_class = bulletin_get_class(bul_class_name)
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except:
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raise ValueError(
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"Type de bulletin PDF invalide (paramètre: %s)" % bul_class_name
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)
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try:
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PDFLOCK.acquire()
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bul_generator = gen_class(
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infos,
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authuser=current_user,
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version=version,
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filigranne=infos["filigranne"],
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server_name=request.url_root,
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)
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if format not in bul_generator.supported_formats:
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# use standard generator
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log(
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"Bulletin format %s not supported by %s, using %s"
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% (format, bul_class_name, bulletin_default_class_name())
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)
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bul_class_name = bulletin_default_class_name()
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gen_class = bulletin_get_class(bul_class_name)
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bul_generator = gen_class(
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infos,
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authuser=current_user,
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version=version,
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filigranne=infos["filigranne"],
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server_name=request.url_root,
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)
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data = bul_generator.generate(format=format, stand_alone=stand_alone)
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finally:
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PDFLOCK.release()
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if bul_generator.diagnostic:
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log("bul_error: %s" % bul_generator.diagnostic)
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raise NoteProcessError(bul_generator.diagnostic)
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filename = bul_generator.get_filename()
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return data, filename
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