340 lines
12 KiB
Python
340 lines
12 KiB
Python
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# coding: utf-8
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import os
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import os.path
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import codecs
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import json
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import time
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#----------------------------------------------------------
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class Database_cl(object):
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#----------------------------------------------------------
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# alle Elemente werden zur Laufzeit des Servers zur Vereinfachung auch im
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# Hauptspeicher abgelegt
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# die nächste zu vergebende Id wird ebenfalls dauerhaft gespeichert
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# zur Vereinfachung wird hier fest vorgegebenen, dass sich die Daten
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# im Unterverzeichnis "data" befinden
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#-------------------------------------------------------
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def __init__(self):
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#-------------------------------------------------------
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self.data_o = {}
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self.readData_p()
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#-------------------------------------------------------
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def createTopic_px(self, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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id_ = self.nextTopicId_p()
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self.data_o['topics'][str(id_)] = data_opl
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file_o = codecs.open(os.path.join('data', 'topics.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['topics']))
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file_o.close()
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return id_
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#-------------------------------------------------------
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def createDiscussion_px(self, tId, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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id_ = self.nextDiscussionId_p()
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self.data_o['discussions'][id_] = data_opl
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self.data_o['topics'][tId]['discs'].append(id_)
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file_o = codecs.open(os.path.join('data', 'discussions.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['discussions']))
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file_o.close()
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file_o = codecs.open(os.path.join('data', 'topics.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['topics']))
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file_o.close()
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return id_
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#-------------------------------------------------------
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def createPost_px(self, dId, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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id_ = self.nextPostId_p()
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self.data_o['posts'][id_] = data_opl
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self.data_o['discussions'][dId]['posts'].append(id_)
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file_o = codecs.open(os.path.join('data', 'posts.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['posts']))
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file_o.close()
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file_o = codecs.open(os.path.join('data', 'discussions.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['discussions']))
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file_o.close()
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return id_
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#-------------------------------------------------------
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def readTopic_px(self, id_ = None):
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#-------------------------------------------------------
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# hier zur Vereinfachung:
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# Aufruf ohne id: alle Einträge liefern
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data_o = None
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if id_ == None:
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data_o = self.data_o['topics']
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elif str(id_) == '0':
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data_o = self.getDefaultTopic_px()
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else:
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if str(id_) in self.data_o['topics']:
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data_o = self.data_o['topics'][str(id_)]
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return data_o
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#-------------------------------------------------------
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def readDiscussion_px(self, tId, dId = None):
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#-------------------------------------------------------
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# hier zur Vereinfachung:
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# Aufruf ohne id: alle Einträge liefern
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data_o = None
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if dId == None:
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data_o = {}
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discs = self.data_o['discussions']
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indices = self.data_o['topics'][str(tId)]['discs']
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for index in indices:
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data_o[index] = discs[index]
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elif str(dId) == '0':
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data_o = self.getDefaultDiscussion_px()
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else:
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if str(dId) in self.data_o['discussions']:
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data_o = self.data_o['discussions'][str(dId)]
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return data_o
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#-------------------------------------------------------
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def readPost_px(self, dId, pId = None):
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#-------------------------------------------------------
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# hier zur Vereinfachung:
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# Aufruf ohne id: alle Einträge liefern
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data_o = None
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if pId == None:
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data_o = {}
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posts = self.data_o['posts']
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indices = self.data_o['discussions'][str(dId)]['posts']
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for index in indices:
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data_o[index] = posts[index]
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elif str(pId) == '0':
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data_o = self.getDefaultPost_px()
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else:
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if str(pId) in self.data_o['posts']:
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data_o = self.data_o['posts'][str(pId)]
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return data_o
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#-------------------------------------------------------
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def updateTopic_px(self, id_, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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updated = False
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if id_ in self.data_o['topics']:
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for key in data_opl:
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self.data_o['topics'][id_][key] = data_opl[key]
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# Datei aktualisieren
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file_o = codecs.open(os.path.join('data', 'topics.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['topics']))
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file_o.close()
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updated = True
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return updated
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#-------------------------------------------------------
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def updateDiscussion_px(self, id_, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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updated = False
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if id_ in self.data_o['discussions']:
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for key in data_opl:
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self.data_o['discussions'][id_][key] = data_opl[key]
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# Datei aktualisieren
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file_o = codecs.open(os.path.join('data', 'discussions.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['discussions']))
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file_o.close()
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updated = True
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return updated
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#-------------------------------------------------------
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def updatePost_px(self, id_, data_opl):
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#-------------------------------------------------------
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# Überprüfung der Daten müsste ergänzt werden!
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updated = False
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if id_ in self.data_o['posts']:
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for key in data_opl:
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self.data_o['posts'][id_][key] = data_opl[key]
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# Datei aktualisieren
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file_o = codecs.open(os.path.join('data', 'posts.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['posts']))
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file_o.close()
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updated = True
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return updated
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#-------------------------------------------------------
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def deleteTopic_px(self, id_):
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#-------------------------------------------------------
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deleted = False
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if id_ in self.data_o['topics']:
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self.data_o['topics'][id_]['deleted'] = True
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for key in self.data_o['topics'][id_]['discs']:
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del self.data_o['discussions'][key]
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self.data_o['topics'][id_]['discs'] = []
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# Dateien aktualisieren
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file_o = codecs.open(os.path.join('data', 'topics.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['topics']))
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file_o.close()
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file_o = codecs.open(os.path.join('data', 'discussions.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['discussions']))
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file_o.close()
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deleted = True
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return deleted
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#-------------------------------------------------------
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def deleteDiscussion_px(self, id_):
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#-------------------------------------------------------
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deleted = False
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if id_ in self.data_o['discussions']:
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self.data_o['discussions'][id_]['deleted'] = True
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for key in self.data_o['discussions'][id_]['posts']:
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del self.data_o['posts'][key]
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self.data_o['discussions'][id_]['posts'] = []
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# Dateien aktualisieren
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file_o = codecs.open(os.path.join('data', 'discussions.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['discussions']))
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file_o.close()
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file_o = codecs.open(os.path.join('data', 'posts.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['posts']))
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file_o.close()
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deleted = True
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return deleted
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#-------------------------------------------------------
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def deletePost_px(self, id_):
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#-------------------------------------------------------
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deleted = False
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if id_ in self.data_o['posts']:
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self.data_o['posts'][id_]['deleted'] = True
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# Datei aktualisieren
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file_o = codecs.open(os.path.join('data', 'posts.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['posts']))
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file_o.close()
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deleted = True
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return deleted
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#-------------------------------------------------------
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def getDefaultTopic_px(self):
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#-------------------------------------------------------
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return {
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'name' : '',
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'owner': '',
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'deleted': False,
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'discs': []
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}
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#-------------------------------------------------------
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def getDefaultDiscussion_px(self):
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#-------------------------------------------------------
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return {
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'name' : '',
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'owner': '',
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'deleted': False,
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'posts': []
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}
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#-------------------------------------------------------
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def getDefaultPost_px(self):
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#-------------------------------------------------------
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return {
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'title' : '',
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'text' : '',
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'owner': '',
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'time': time.localtime(),
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'deleted': False,
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}
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#-------------------------------------------------------
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def getUsers_px(self):
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#-------------------------------------------------------
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return self.data_o['users']
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#-------------------------------------------------------
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def saveUsers_px(self, data_o):
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#-------------------------------------------------------
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file_o = codecs.open(os.path.join('data', 'users.dat'), 'w', 'utf-8')
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file_o.write(json.dumps(self.data_o['users']))
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file_o.close()
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#-------------------------------------------------------
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def readData_p(self):
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#-------------------------------------------------------
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files_a = os.listdir('data')
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for fileName_s in files_a:
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if fileName_s.endswith('.dat'):
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file_o = codecs.open(os.path.join('data', fileName_s), 'rU', 'utf-8')
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content_s = file_o.read()
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file_o.close()
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id_s = fileName_s[:-4]
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self.data_o[id_s] = json.loads(content_s)
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#-------------------------------------------------------
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def nextTopicId_p(self):
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#-------------------------------------------------------
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id_ = str(self.data_o['topics']['nextID'])
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nextID = int(self.data_o['topics']['nextID'])
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self.data_o['topics']['nextID'] = str(nextID + 1)
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return id_
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#-------------------------------------------------------
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def nextDiscussionId_p(self):
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#-------------------------------------------------------
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id_ = str(self.data_o['discussions']['nextID'])
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nextID = int(self.data_o['discussions']['nextID'])
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self.data_o['discussions']['nextID'] = str(nextID + 1)
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return id_
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#-------------------------------------------------------
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def nextPostId_p(self):
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#-------------------------------------------------------
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id_ = str(self.data_o['posts']['nextID'])
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nextID = int(self.data_o['posts']['nextID'])
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self.data_o['posts']['nextID'] = str(nextID + 1)
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return id_
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db_o = Database_cl()
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# EOF
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