forked from ScoDoc/ScoDoc
681 lines
21 KiB
Python
681 lines
21 KiB
Python
# -*- mode: python -*-
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# -*- coding: utf-8 -*-
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import pdb, os, sys, string
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import traceback
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import psycopg2
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import psycopg2.pool
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import psycopg2.extras
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import thread
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from flask import g
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import app.scodoc.sco_utils as scu
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from app.scodoc.notes_log import log
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from app.scodoc.sco_exceptions import ScoException, ScoValueError, NoteProcessError
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from types import StringType
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from cgi import escape
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import datetime
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quote_html = escape
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def quote_dict(d):
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"html quote all values in dict"
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for k in d.keys():
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v = d[k]
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if type(v) == StringType:
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d[k] = quote_html(v, quote=True)
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def unquote(s):
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"inverse of quote"
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# pas d'inverse de cgi.escape
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# ne traite que &
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# XX voir aussi sco_utils.unescape_html
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return s.replace("&", "&")
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# Ramene une connexion a la base de donnees scolarite
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# pour l'instance donnee par context
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# La connexion est unique (réutilisée) pour chaque thread
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# et est par défaut en autocommit
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# _pools = {}
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#
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#
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# def GetDBConnexion(autocommit=True):
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# """connexion to the DB of a departement"""
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# pool = _pools.get(scu.get_db_cnx_string(), None)
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# if not pool:
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# pool = psycopg2.pool.ThreadedConnectionPool(2, 8, dsn=scu.get_db_cnx_string())
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# _pools[scu.get_db_cnx_string()] = pool
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# # log('GetDBConnexion: created pool for "%s"' % scu.get_db_cnx_string())
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# cnx = pool.getconn(key=(thread.get_ident(), autocommit))
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# # log('GetDBConnexion: autocommit=%s cnx=%s' % (autocommit,cnx))
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# if cnx.autocommit != autocommit:
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# cnx.autocommit = autocommit
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# return cnx
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def open_dept_connection():
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"""Open a connection to the current dept db"""
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# log("open_dept_connection to " + scu.get_db_cnx_string()) # XXX
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return psycopg2.connect(scu.get_db_cnx_string())
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def close_dept_connection():
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"""Commit and close dept db."""
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# log("close_dept_connection to " + scu.get_db_cnx_string()) # XXX
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g.db_conn.commit()
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g.db_conn.close()
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# Essai bien plus simple pour Flask:
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def GetDBConnexion(autocommit=True): # on n'utilise plus autocommit
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return g.db_conn
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# Same for users:
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_users_pools = {}
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def GetUsersDBConnexion(context, autocommit=True):
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pool = _users_pools.get(scu.get_db_cnx_string(), None)
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if not pool:
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pool = psycopg2.pool.ThreadedConnectionPool(2, 8, dsn=scu.get_db_cnx_string())
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_users_pools[scu.get_db_cnx_string()] = pool
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log('GetUsersDBConnexion: created pool for "%s"' % scu.get_db_cnx_string())
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cnx = pool.getconn(key=(thread.get_ident(), autocommit))
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if cnx.autocommit != autocommit:
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cnx.autocommit = autocommit
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return cnx
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# Nota: on pourrait maintenant utiliser psycopg2.extras.DictCursor
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class ScoDocCursor(psycopg2.extensions.cursor):
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"""A database cursor emulating some methods of psycopg v1 cursors"""
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def dictfetchall(self):
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col_names = [d[0] for d in self.description]
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return [dict(zip(col_names, row)) for row in self.fetchall()]
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def dictfetchone(self):
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col_names = [d[0] for d in self.description]
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row = self.fetchone()
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if row:
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return dict(zip(col_names, row))
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else:
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return {}
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def SimpleQuery(context, query, args, cursor=None):
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if not cursor:
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cnx = GetDBConnexion()
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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# log( 'SimpleQuery(%s)' % (query % args) )
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cursor.execute(query, args)
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return cursor
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def SimpleDictFetch(context, query, args, cursor=None):
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cursor = SimpleQuery(context, query, args, cursor=cursor)
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return cursor.dictfetchall()
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def DBInsertDict(cnx, table, vals, commit=0, convert_empty_to_nulls=1):
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"insert into table values in dict 'vals'"
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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if convert_empty_to_nulls:
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for col in vals.keys():
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if vals[col] == "":
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vals[col] = None
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# open('/tmp/vals','a').write( str(vals) + '\n' )
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cols = vals.keys()
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colnames = ",".join(cols)
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fmt = ",".join(["%%(%s)s" % col for col in cols])
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# print 'insert into %s (%s) values (%s)' % (table,colnames,fmt)
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oid = None
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try:
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if vals:
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cursor.execute(
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"insert into %s (%s) values (%s)" % (table, colnames, fmt), vals
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)
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else:
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cursor.execute("insert into %s default values" % table)
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oid = cursor.lastrowid
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except:
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log("DBInsertDict: EXCEPTION !")
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log("DBInsertDict: table=%s, vals=%s" % (str(table), str(vals)))
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log("DBInsertDict: commit (exception)")
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cnx.commit() # get rid of this transaction
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raise # and re-raise exception
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if commit:
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log("DBInsertDict: commit (requested)")
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cnx.commit()
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return oid
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def DBSelectArgs(
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cnx,
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table,
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vals,
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what=["*"],
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sortkey=None,
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test="=",
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operator="and",
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distinct=True,
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aux_tables=[],
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id_name=None,
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limit="",
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offset="",
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):
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"""Select * from table where values match dict vals.
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Returns cnx, columns_names, list of tuples
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aux_tables = ( tablename, id_name )
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"""
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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if sortkey:
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orderby = " order by " + sortkey
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else:
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orderby = ""
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if distinct:
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distinct = " distinct "
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else:
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distinct = ""
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if limit != "":
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limit = " LIMIT %d" % limit
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if not offset:
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offset = ""
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if offset != "":
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offset = " OFFSET %d" % offset
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operator = " " + operator + " "
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# liste des tables (apres "from")
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tables = [table] + [x[0] for x in aux_tables]
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for i in range(len(tables)):
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tables[i] = "%s T%d" % (tables[i], i)
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tables = ", ".join(tables)
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# condition (apres "where")
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cond = ""
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i = 1
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cl = []
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for (_, aux_id) in aux_tables:
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cl.append("T0.%s = T%d.%s" % (id_name, i, aux_id))
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i = i + 1
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cond += " and ".join(cl)
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# Traitement des expressions régulières:
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# n'autorise pas d'expressions
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if test == "~":
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for k in vals.keys():
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vals[k] = vals[k].translate(string.maketrans("", ""), '%*()+=&|[]"`')
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if vals:
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if aux_tables: # paren
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cond += " AND ( "
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cond += operator.join(
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["T0.%s%s%%(%s)s" % (x, test, x) for x in vals.keys() if vals[x] != None]
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)
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cnuls = " and ".join(
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["T0.%s is NULL" % x for x in vals.keys() if vals[x] is None]
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)
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if cnuls:
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if cond:
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cond = cond + " and " + cnuls
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else:
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cond = cnuls
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# close paren
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if aux_tables:
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cond += ") "
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if cond:
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cond = " where " + cond
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#
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req = (
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"select "
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+ distinct
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+ ", ".join(what)
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+ " from "
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+ tables
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+ cond
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+ orderby
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+ limit
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+ offset
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)
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# open('/tmp/select.log','a').write( req % vals + '\n' )
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try:
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cursor.execute(req, vals)
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except:
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log('Exception in DBSelectArgs:\n\treq="%s"\n\tvals="%s"\n' % (req, vals))
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log(traceback.format_exc())
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raise ScoException()
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return cursor.dictfetchall()
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def DBUpdateArgs(cnx, table, vals, where=None, commit=False, convert_empty_to_nulls=1):
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if not vals or where is None:
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return
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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if convert_empty_to_nulls:
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for col in vals.keys():
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if vals[col] == "":
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vals[col] = None
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s = ", ".join(["%s=%%(%s)s" % (x, x) for x in vals.keys()])
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try:
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req = "update " + table + " set " + s + " where " + where
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cursor.execute(req, vals)
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# log('req=%s\n'%req)
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# log('vals=%s\n'%vals)
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except:
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cnx.commit() # get rid of this transaction
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log('Exception in DBUpdateArgs:\n\treq="%s"\n\tvals="%s"\n' % (req, vals))
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raise # and re-raise exception
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if commit:
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cnx.commit()
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def DBDelete(cnx, table, colid, val, commit=False):
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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try:
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cursor.execute(
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"delete from " + table + " where %s=%%(%s)s" % (colid, colid), {colid: val}
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)
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except:
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cnx.commit() # get rid of this transaction
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raise # and re-raise exception
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if commit:
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cnx.commit()
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# --------------------------------------------------------------------
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# REQLOG = open('/tmp/req.log', 'w') # DEBUG
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# REQN = 0
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class EditableTable:
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"""--- generic class: SQL table with create/edit/list/delete"""
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def __init__(
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self,
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table_name,
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id_name,
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dbfields,
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sortkey=None,
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output_formators={},
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input_formators={},
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aux_tables=[],
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convert_null_outputs_to_empty=True,
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callback_on_write=None,
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allow_set_id=False,
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html_quote=True,
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fields_creators={}, # { field : [ sql_command_to_create_it ] }
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filter_nulls=True, # dont allow to set fields to null
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):
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self.table_name = table_name
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self.id_name = id_name
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self.aux_tables = aux_tables
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self.dbfields = dbfields
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self.sortkey = sortkey
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self.output_formators = output_formators
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self.input_formators = input_formators
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self.convert_null_outputs_to_empty = convert_null_outputs_to_empty
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self.callback_on_write = (
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callback_on_write # called after each modification (USELESS and unused)
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)
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self.allow_set_id = allow_set_id
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self.html_quote = html_quote
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self.fields_creators = fields_creators
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self.filter_nulls = filter_nulls
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self.sql_default_values = None
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def create(self, cnx, args, has_uniq_values=False):
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"create object in table"
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vals = dictfilter(args, self.dbfields, self.filter_nulls)
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if vals.has_key(self.id_name) and not self.allow_set_id:
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del vals[self.id_name]
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if self.html_quote:
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quote_dict(vals) # quote all HTML markup
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# format value
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for title in vals.keys():
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if self.input_formators.has_key(title):
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vals[title] = self.input_formators[title](vals[title])
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# insert
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oid = DBInsertDict(cnx, self.table_name, vals, commit=True)
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# get back new object id
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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cursor.execute(
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"select %(id_name)s from %(table_name)s where oid=%(oid)s"
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% {"id_name": self.id_name, "table_name": self.table_name, "oid": oid}
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)
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new_id = cursor.fetchone()[0]
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if has_uniq_values: # XXX probably obsolete
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# check all tuples (without id_name) are UNIQUE !
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res = DBSelectArgs(cnx, self.table_name, vals, what=[self.id_name])
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if len(res) != 1:
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# BUG !
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log("create: BUG table_name=%s args=%s" % (self.table_name, str(args)))
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assert len(res) == 1, "len(res) = %d != 1 !" % len(res)
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if self.callback_on_write:
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self.callback_on_write()
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return new_id
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def delete(self, cnx, oid, commit=True):
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"delete tuple"
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DBDelete(cnx, self.table_name, self.id_name, oid, commit=commit)
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if self.callback_on_write:
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self.callback_on_write()
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def list(
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self,
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cnx,
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args={},
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operator="and",
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test="=",
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sortkey=None,
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disable_formatting=False,
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limit="",
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offset="",
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):
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"returns list of dicts"
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# REQLOG.write('%s: %s by %s (%s) %d\n'%(self.table_name,args,sys._getframe(1).f_code.co_name, sys._getframe(2).f_code.co_name, REQN))
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# REQLOG.flush()
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# global REQN
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# REQN = REQN + 1
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vals = dictfilter(args, self.dbfields, self.filter_nulls)
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if not sortkey:
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sortkey = self.sortkey
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res = DBSelectArgs(
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cnx,
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self.table_name,
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vals,
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sortkey=sortkey,
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test=test,
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operator=operator,
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aux_tables=self.aux_tables,
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id_name=self.id_name,
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limit=limit,
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offset=offset,
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)
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for r in res:
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self.format_output(r, disable_formatting=disable_formatting)
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return res
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def format_output(self, r, disable_formatting=False):
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"Format dict using provided output_formators"
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for (k, v) in r.items():
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if v is None and self.convert_null_outputs_to_empty:
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v = ""
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# format value
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if not disable_formatting and self.output_formators.has_key(k):
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try: # XXX debug "isodate"
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v = self.output_formators[k](v)
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except:
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log("*** list: vars=%s" % str(vars()))
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log("*** list: r=%s" % str(r))
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raise
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r[k] = v
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def edit(self, cnx, args, html_quote=None):
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"""Change fields"""
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vals = dictfilter(args, self.dbfields, self.filter_nulls)
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html_quote = html_quote or self.html_quote
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if html_quote:
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quote_dict(vals) # quote HTML
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# format value
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for title in vals.keys():
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if self.input_formators.has_key(title):
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try:
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vals[title] = self.input_formators[title](vals[title])
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except:
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log("exception while converting %s=%s" % (title, vals[title]))
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raise
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DBUpdateArgs(
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cnx,
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self.table_name,
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vals,
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where="%s=%%(%s)s" % (self.id_name, self.id_name),
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commit=True,
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)
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if self.callback_on_write:
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self.callback_on_write()
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def get_sql_default_values(self, cnx):
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"return dict with SQL default values for each field"
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if self.sql_default_values is None: # not cached
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# We insert a new tuple, get the values and delete it
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# XXX non, car certaines tables ne peuvent creer de tuples
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# a default, a cause des references ou contraintes d'intégrité.
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# oid = self.create(cnx, {})
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# vals = self.list(cnx, args= {self.id_name : oid})[0]
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# self.delete(cnx, oid)
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# self.sql_default_values = vals
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#
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# Méthode spécifique à postgresql (>= 7.4)
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cursor = cnx.cursor(cursor_factory=ScoDocCursor)
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cursor.execute(
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"SELECT column_name, data_type, column_default FROM information_schema.columns WHERE table_name = '%s'"
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% self.table_name
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)
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d = {}
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for info in cursor.dictfetchall():
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v = info["column_default"]
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# strip type information if present (eg 'hello'::text)
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if v:
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v = v.split("::")[0]
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# convert type to Python type
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if v:
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if info["data_type"] == "text":
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log('get: v="%s"' % v)
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if v[0] == v[-1] == "'":
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v = v[1:-1] # strip quotes
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elif v[:2] == "E'" and v[-1] == "'":
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v = v[2:-1] # postgresql string with escapes
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v = v.replace(
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"\\012", "\n"
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) # fix (je ne comprend pas bien pourquoi les valeurs sont ici quotées, ce n'est pas le cas dans les tables ordinaires)
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v = v.replace("''", "'") # idem
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log('--> v="%s"' % v)
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elif info["data_type"] == "real":
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v = float(v)
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elif info["data_type"] == "integer":
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v = int(v)
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# elif info['data_type'] == 'date':
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# pass # XXX todo
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else:
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log("Warning: unhandled SQL type in get_sql_default_values")
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d[info["column_name"]] = v
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self.sql_default_values = d
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return self.sql_default_values
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def dictfilter(d, fields, filter_nulls=True):
|
|
# returns a copy of d with only keys listed in "fields" and non null values
|
|
r = {}
|
|
for f in fields:
|
|
if d.has_key(f) and (d[f] != None or not filter_nulls):
|
|
try:
|
|
val = d[f].strip()
|
|
except:
|
|
val = d[f]
|
|
# if val != '': not a good idea: how to suppress a field ?
|
|
r[f] = val
|
|
return r
|
|
|
|
|
|
# --------------------------------------------------------------------
|
|
# --- Misc Tools
|
|
|
|
|
|
def DateDMYtoISO(dmy, null_is_empty=False):
|
|
"convert date string from french format to ISO"
|
|
if not dmy:
|
|
if null_is_empty:
|
|
return ""
|
|
else:
|
|
return None
|
|
if type(dmy) != StringType:
|
|
return dmy.strftime("%Y-%m-%d")
|
|
|
|
t = dmy.split("/")
|
|
|
|
if len(t) != 3:
|
|
raise ScoValueError('Format de date (j/m/a) invalide: "%s"' % str(dmy))
|
|
day, month, year = t
|
|
year = int(year)
|
|
month = int(month)
|
|
day = int(day)
|
|
# accept years YYYY or YY, uses 1970 as pivot
|
|
if year < 100:
|
|
if year > 70:
|
|
year += 1900
|
|
else:
|
|
year += 2000
|
|
|
|
if month < 1 or month > 12:
|
|
raise ScoValueError("mois de la date invalide ! (%s)" % month)
|
|
# compute nb of day in month:
|
|
mo = month
|
|
if mo > 7:
|
|
mo = mo + 1
|
|
if mo % 2:
|
|
MonthNbDays = 31
|
|
elif mo == 2:
|
|
if year % 4 == 0 and ((year % 100 != 0) or (year % 400 == 0)):
|
|
MonthNbDays = 29 # leap
|
|
else:
|
|
MonthNbDays = 28
|
|
else:
|
|
MonthNbDays = 30
|
|
if day < 1 or day > MonthNbDays:
|
|
raise ScoValueError("jour de la date invalide ! (%s)" % day)
|
|
return "%04d-%02d-%02d" % (year, month, day)
|
|
|
|
|
|
def DateISOtoDMY(isodate):
|
|
if not isodate:
|
|
return ""
|
|
arg = isodate # debug
|
|
# si isodate est une instance de DateTime !
|
|
try:
|
|
isodate = "%s-%s-%s" % (isodate.year(), isodate.month(), isodate.day())
|
|
# log('DateISOtoDMY: converted isodate to iso !')
|
|
except:
|
|
pass
|
|
# drop time from isodate and split
|
|
t = str(isodate).split()[0].split("-")
|
|
if len(t) != 3:
|
|
# XXX recherche bug intermittent assez etrange
|
|
log('*** DateISOtoDMY: invalid isodate "%s" (arg="%s")' % (str(isodate), arg))
|
|
raise NoteProcessError(
|
|
'invalid isodate: "%s" (arg="%s" type=%s)' % (str(isodate), arg, type(arg))
|
|
)
|
|
year, month, day = t
|
|
year = int(year)
|
|
month = int(month)
|
|
day = int(day)
|
|
if month < 1 or month > 12:
|
|
raise ValueError("invalid month")
|
|
if day < 1 or day > 31:
|
|
raise ValueError("invalid day")
|
|
return "%02d/%02d/%04d" % (day, month, year)
|
|
|
|
|
|
def TimetoISO8601(t, null_is_empty=False):
|
|
"convert time string to ISO 8601 (allow 16:03, 16h03, 16)"
|
|
if isinstance(t, datetime.time):
|
|
return t.isoformat()
|
|
if not t and null_is_empty:
|
|
return ""
|
|
t = t.strip().upper().replace("H", ":")
|
|
if t and t.count(":") == 0 and len(t) < 3:
|
|
t = t + ":00"
|
|
return t
|
|
|
|
|
|
def TimefromISO8601(t):
|
|
"convert time string from ISO 8601 to our display format"
|
|
if not t:
|
|
return t
|
|
# XXX strange bug turnaround...
|
|
try:
|
|
t = "%s:%s" % (t.hour(), t.minute())
|
|
# log('TimefromISO8601: converted isotime to iso !')
|
|
except:
|
|
pass
|
|
fs = str(t).split(":")
|
|
return fs[0] + "h" + fs[1] # discard seconds
|
|
|
|
|
|
def TimeDuration(heure_debut, heure_fin):
|
|
"""duree (nb entier de minutes) entre deux heures a notre format
|
|
ie 12h23
|
|
"""
|
|
if heure_debut and heure_fin:
|
|
h0, m0 = [int(x) for x in heure_debut.split("h")]
|
|
h1, m1 = [int(x) for x in heure_fin.split("h")]
|
|
d = (h1 - h0) * 60 + (m1 - m0)
|
|
return d
|
|
else:
|
|
return None
|
|
|
|
|
|
def float_null_is_zero(x):
|
|
if x is None or x == "":
|
|
return 0.0
|
|
else:
|
|
return float(x)
|
|
|
|
|
|
def int_null_is_zero(x):
|
|
if x is None or x == "":
|
|
return 0
|
|
else:
|
|
return int(x)
|
|
|
|
|
|
def int_null_is_null(x):
|
|
if x is None or x == "":
|
|
return None
|
|
else:
|
|
return int(x)
|
|
|
|
|
|
def float_null_is_null(x):
|
|
if x is None or x == "":
|
|
return None
|
|
else:
|
|
return float(x)
|
|
|
|
|
|
# post filtering
|
|
#
|
|
def UniqListofDicts(L, key):
|
|
"""L is a list of dicts.
|
|
Remove from L all items which share the same key/value
|
|
"""
|
|
# well, code is simpler than documentation:
|
|
d = {}
|
|
for item in L:
|
|
d[item[key]] = item
|
|
return d.values()
|
|
|
|
|
|
#
|
|
def copy_tuples_changing_attribute(
|
|
cnx, table, column, old_value, new_value, to_exclude=[]
|
|
):
|
|
"""Duplicate tuples in DB table, replacing column old_value by new_value
|
|
|
|
Will raise exception if violation of integerity constraint !
|
|
"""
|
|
cursor = cnx.cursor(cursor_factory=ScoDocCursor)
|
|
cursor.execute(
|
|
"select * from %s where %s=%%(old_value)s" % (table, column),
|
|
{"old_value": old_value},
|
|
)
|
|
res = cursor.dictfetchall()
|
|
for t in res:
|
|
t[column] = new_value
|
|
for c in to_exclude:
|
|
del t[c]
|
|
DBInsertDict(cnx, table, t, convert_empty_to_nulls=False)
|