mirror of https://gitlab.com/bashrc2/epicyon
607 lines
22 KiB
Python
607 lines
22 KiB
Python
__filename__ = "content.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.1.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@freedombone.net"
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__status__ = "Production"
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import os
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import time
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import email.parser
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from shutil import copyfile
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from utils import loadJson
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from utils import fileLastModified
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def switchWords(baseDir: str,nickname: str,domain: str,content: str) -> str:
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"""Performs word replacements. eg. Trump -> The Orange Menace
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"""
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switchWordsFilename= \
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baseDir+'/accounts/'+nickname+'@'+domain+'/replacewords.txt'
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if not os.path.isfile(switchWordsFilename):
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return content
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with open(switchWordsFilename, 'r') as fp:
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for line in fp:
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replaceStr=line.replace('\n','')
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wordTransform=None
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if '->' in replaceStr:
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wordTransform=replaceStr.split('->')
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elif ':' in replaceStr:
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wordTransform=replaceStr.split(':')
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elif ',' in replaceStr:
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wordTransform=replaceStr.split(',')
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elif ';' in replaceStr:
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wordTransform=replaceStr.split(';')
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elif '-' in replaceStr:
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wordTransform=replaceStr.split('-')
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if not wordTransform:
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continue
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if len(wordTransform)==2:
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content= \
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content.replace(wordTransform[0].strip().replace('"',''), \
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wordTransform[1].strip().replace('"',''))
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return content
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def replaceEmojiFromTags(content: str,tag: [],messageType: str) -> str:
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"""Uses the tags to replace :emoji: with html image markup
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"""
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for tagItem in tag:
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if not tagItem.get('type'):
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continue
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if tagItem['type']!='Emoji':
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continue
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if not tagItem.get('name'):
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continue
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if not tagItem.get('icon'):
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continue
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if not tagItem['icon'].get('url'):
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continue
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if '/' not in tagItem['icon']['url']:
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continue
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if tagItem['name'] not in content:
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continue
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iconName=tagItem['icon']['url'].split('/')[-1]
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if iconName:
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if len(iconName)>1:
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if iconName[0].isdigit():
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if '.' in iconName:
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iconName=iconName.split('.')[0]
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# see https://unicode.org/emoji/charts/full-emoji-list.html
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if '-' not in iconName:
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# a single code
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try:
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content= \
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content.replace(tagItem['name'], \
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chr(int("0x"+iconName,16)))
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except:
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pass
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else:
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# sequence of codes
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iconCodes=iconName.split('-')
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iconCodeSequence=''
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for icode in iconCodes:
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try:
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iconCodeSequence+=chr(int("0x"+icode,16))
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except:
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iconCodeSequence=''
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break
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if iconCodeSequence:
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content= \
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content.replace(tagItem['name'], \
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iconCodeSequence)
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htmlClass='emoji'
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if messageType=='post header':
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htmlClass='emojiheader'
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if messageType=='profile':
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htmlClass='emojiprofile'
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emojiHtml="<img src=\""+tagItem['icon']['url']+"\" alt=\""+tagItem['name'].replace(':','')+"\" align=\"middle\" class=\""+htmlClass+"\"/>"
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content=content.replace(tagItem['name'],emojiHtml)
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return content
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def addMusicTag(content: str,tag: str) -> str:
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"""If a music link is found then ensure that the post is tagged appropriately
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"""
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if '#' not in tag:
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tag='#'+tag
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if tag in content:
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return content
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musicSites=['soundcloud.com','bandcamp.com']
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musicSiteFound=False
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for site in musicSites:
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if site+'/' in content:
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musicSiteFound=True
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break
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if not musicSiteFound:
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return content
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return ':music: '+content+' '+tag+' '
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def addWebLinks(content: str) -> str:
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"""Adds markup for web links
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"""
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if not ('https://' in content or 'http://' in content):
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return content
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maxLinkLength=40
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words=content.replace('\n',' --linebreak-- ').split(' ')
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replaceDict={}
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for w in words:
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if w.startswith('https://') or \
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w.startswith('http://') or \
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w.startswith('i2p://') or \
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w.startswith('dat://'):
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if w.endswith('.') or w.endswith(';'):
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w=w[:-1]
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markup='<a href="'+w+'" rel="nofollow noopener" target="_blank">'
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if w.startswith('https://'):
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markup+='<span class="invisible">https://</span>'
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elif w.startswith('http://'):
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markup+='<span class="invisible">http://</span>'
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elif w.startswith('i2p://'):
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markup+='<span class="invisible">i2p://</span>'
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elif w.startswith('dat://'):
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markup+='<span class="invisible">dat://</span>'
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linkText=w.replace('https://','').replace('http://','').replace('dat://','').replace('i2p://','')
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# prevent links from becoming too long
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if len(linkText)>maxLinkLength:
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markup+='<span class="ellipsis">'+linkText[:maxLinkLength]+'</span>'
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markup+='<span class="invisible">'+linkText[maxLinkLength:]+'</span></a>'
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else:
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markup+='<span class="ellipsis">'+linkText+'</span></a>'
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replaceDict[w]=markup
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for url,markup in replaceDict.items():
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content=content.replace(url,markup)
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content=content.replace(' --linebreak-- ','<br>')
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return content
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def validHashTag(hashtag: str) -> bool:
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"""Returns true if the give hashtag contains valid characters
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"""
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validChars = set('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ')
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if set(hashtag).issubset(validChars):
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return True
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return False
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def addHashTags(wordStr: str,httpPrefix: str,domain: str, \
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replaceHashTags: {},postHashtags: {}) -> bool:
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"""Detects hashtags and adds them to the replacements dict
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Also updates the hashtags list to be added to the post
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"""
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if replaceHashTags.get(wordStr):
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return True
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hashtag=wordStr[1:]
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if not validHashTag(hashtag):
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return False
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hashtagUrl=httpPrefix+"://"+domain+"/tags/"+hashtag
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postHashtags[hashtag]= {
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'href': hashtagUrl,
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'name': '#'+hashtag,
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'type': 'Hashtag'
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}
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replaceHashTags[wordStr]= \
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"<a href=\""+hashtagUrl+"\" class=\"mention hashtag\" rel=\"tag\">#<span>"+hashtag+"</span></a>"
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return True
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def loadEmojiDict(emojiDataFilename: str,emojiDict: {}) -> None:
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"""Creates an emoji dictionary based on emoji/emoji-data.txt
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"""
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if not os.path.isfile(emojiDataFilename):
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return
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with open (emojiDataFilename, "r") as fileHandler:
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for line in fileHandler:
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if len(line)<5:
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continue
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if line.startswith('#'):
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continue
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if '; Emoji' not in line:
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continue
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if ')' not in line:
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continue
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emojiUnicode=line.split(' ')[0]
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if len(emojiUnicode)<4:
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continue
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if '..' in emojiUnicode:
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emojiUnicode=emojiUnicode.split('..')[0]
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emojiName=line.split(')',1)[1].strip().replace('\n','').replace(' ','').replace('-','')
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if '..' in emojiName:
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emojiName=emojiName.split('..')[0]
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emojiDict[emojiName.lower()]=emojiUnicode
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def addEmoji(baseDir: str,wordStr: str, \
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httpPrefix: str,domain: str, \
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replaceEmoji: {},postTags: {}, \
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emojiDict: {}) -> bool:
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"""Detects Emoji and adds them to the replacements dict
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Also updates the tags list to be added to the post
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"""
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if not wordStr.startswith(':'):
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return False
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if not wordStr.endswith(':'):
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return False
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if len(wordStr)<3:
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return False
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if replaceEmoji.get(wordStr):
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return True
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# remove leading and trailing : characters
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emoji=wordStr[1:]
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emoji=emoji[:-1]
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# is the text of the emoji valid?
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if not validHashTag(emoji):
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return False
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if not emojiDict.get(emoji):
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return False
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emojiFilename=baseDir+'/emoji/'+emojiDict[emoji]+'.png'
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if not os.path.isfile(emojiFilename):
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return False
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emojiUrl=httpPrefix+"://"+domain+"/emoji/"+emojiDict[emoji]+'.png'
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postTags[emoji]= {
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'icon': {
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'mediaType': 'image/png',
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'type': 'Image',
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'url': emojiUrl
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},
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'name': ':'+emoji+':',
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"updated": fileLastModified(emojiFilename),
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"id": emojiUrl.replace('.png',''),
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'type': 'Emoji'
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}
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return True
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def addMention(wordStr: str,httpPrefix: str,following: str,replaceMentions: {},recipients: [],tags: {}) -> bool:
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"""Detects mentions and adds them to the replacements dict and recipients list
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"""
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possibleHandle=wordStr[1:]
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# @nick
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if following and '@' not in possibleHandle:
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# fall back to a best effort match against the following list
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# if no domain was specified. eg. @nick
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possibleNickname=possibleHandle
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for follow in following:
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if follow.startswith(possibleNickname+'@'):
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replaceDomain=follow.replace('\n','').split('@')[1]
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recipientActor=httpPrefix+"://"+replaceDomain+"/users/"+possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr]={
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr]="<span class=\"h-card\"><a href=\""+httpPrefix+"://"+replaceDomain+"/@"+possibleNickname+"\" class=\"u-url mention\">@<span>"+possibleNickname+"</span></a></span>"
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return True
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return False
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possibleNickname=None
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possibleDomain=None
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if '@' not in possibleHandle:
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return False
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possibleNickname=possibleHandle.split('@')[0]
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if not possibleNickname:
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return False
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possibleDomain=possibleHandle.split('@')[1].strip('\n')
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if not possibleDomain:
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return False
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if following:
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for follow in following:
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if follow.replace('\n','')!=possibleHandle:
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continue
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recipientActor=httpPrefix+"://"+possibleDomain+"/users/"+possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr]={
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr]="<span class=\"h-card\"><a href=\""+httpPrefix+"://"+possibleDomain+"/@"+possibleNickname+"\" class=\"u-url mention\">@<span>"+possibleNickname+"</span></a></span>"
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return True
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# @nick@domain
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if not (possibleDomain=='localhost' or '.' in possibleDomain):
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return False
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recipientActor=httpPrefix+"://"+possibleDomain+"/users/"+possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr]={
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr]="<span class=\"h-card\"><a href=\""+httpPrefix+"://"+possibleDomain+"/@"+possibleNickname+"\" class=\"u-url mention\">@<span>"+possibleNickname+"</span></a></span>"
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return True
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def removeLongWords(content: str,maxWordLength: int,longWordsList: []) -> str:
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"""Breaks up long words so that on mobile screens this doesn't disrupt the layout
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"""
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if ' ' not in content:
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# handle a single very long string with no spaces
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contentStr=content.replace('<p>','').replace('<\p>','')
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if '://' not in contentStr:
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if len(contentStr)>maxWordLength:
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if '<p>' in content:
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content='<p>'+contentStr[:maxWordLength]+'<\p>'
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else:
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content=content[:maxWordLength]
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return content
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words=content.split(' ')
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if not longWordsList:
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longWordsList=[]
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for wordStr in words:
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if len(wordStr)>maxWordLength:
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if wordStr not in longWordsList:
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longWordsList.append(wordStr)
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for wordStr in longWordsList:
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if wordStr.startswith('<'):
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continue
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if '=\"' in wordStr:
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continue
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if '@' in wordStr:
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if '@@' not in wordStr:
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continue
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if '=.ed25519' in wordStr:
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continue
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if '.onion' in wordStr:
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continue
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if '.i2p' in wordStr:
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continue
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if 'https:' in wordStr:
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continue
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elif 'http:' in wordStr:
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continue
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elif 'i2p:' in wordStr:
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continue
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elif 'dat:' in wordStr:
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continue
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if '<' in wordStr:
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replaceWord=wordStr.split('<',1)[0]
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content= \
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content.replace(wordStr,replaceWord)
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wordStr=replaceWord
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if '/' in wordStr:
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continue
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if len(wordStr[maxWordLength:])<maxWordLength:
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content= \
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content.replace(wordStr, \
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wordStr[:maxWordLength]+'\n'+ \
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wordStr[maxWordLength:])
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else:
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content= \
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content.replace(wordStr, \
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wordStr[:maxWordLength])
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if content.startswith('<p>'):
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if not content.endswith('</p>'):
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content=content.strip()+'</p>'
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return content
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def addHtmlTags(baseDir: str,httpPrefix: str, \
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nickname: str,domain: str,content: str, \
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recipients: [],hashtags: {},isJsonContent=False) -> str:
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""" Replaces plaintext mentions such as @nick@domain into html
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by matching against known following accounts
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"""
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if content.startswith('<p>'):
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return content
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maxWordLength=40
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content=content.replace('\n',' --linebreak-- ')
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content=addMusicTag(content,'nowplaying')
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words=content.replace(',',' ').replace(';',' ').split(' ')
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# remove . for words which are not mentions
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wordCtr=0
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newWords=[]
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for wordIndex in range(0,len(words)):
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wordStr=words[wordIndex]
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if wordStr.endswith('.'):
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if not wordStr.startswith('@'):
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wordStr=wordStr[:-1]
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if wordStr.startswith('.'):
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wordStr=wordStr[1:]
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newWords.append(wordStr)
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words=newWords
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replaceMentions={}
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replaceHashTags={}
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replaceEmoji={}
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emojiDict={}
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originalDomain=domain
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if ':' in domain:
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domain=domain.split(':')[0]
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followingFilename=baseDir+'/accounts/'+nickname+'@'+domain+'/following.txt'
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# read the following list so that we can detect just @nick
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# in addition to @nick@domain
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following=None
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if '@' in words:
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if os.path.isfile(followingFilename):
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with open(followingFilename, "r") as f:
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following = f.readlines()
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# extract mentions and tags from words
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longWordsList=[]
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for wordStr in words:
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wordLen=len(wordStr)
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if wordLen>2:
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if wordLen>maxWordLength:
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longWordsList.append(wordStr)
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firstChar=wordStr[0]
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if firstChar=='@':
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if addMention(wordStr,httpPrefix,following,replaceMentions,recipients,hashtags):
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continue
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elif firstChar=='#':
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if addHashTags(wordStr,httpPrefix,originalDomain,replaceHashTags,hashtags):
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continue
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elif ':' in wordStr:
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#print('TAG: emoji located - '+wordStr)
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wordStr2=wordStr.split(':')[1]
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if not emojiDict:
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# emoji.json is generated so that it can be customized and the changes
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# will be retained even if default_emoji.json is subsequently updated
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if not os.path.isfile(baseDir+'/emoji/emoji.json'):
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copyfile(baseDir+'/emoji/default_emoji.json',baseDir+'/emoji/emoji.json')
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emojiDict=loadJson(baseDir+'/emoji/emoji.json')
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#print('TAG: looking up emoji for :'+wordStr2+':')
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addEmoji(baseDir,':'+wordStr2+':',httpPrefix,originalDomain,replaceEmoji,hashtags,emojiDict)
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# replace words with their html versions
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for wordStr,replaceStr in replaceMentions.items():
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content=content.replace(wordStr,replaceStr)
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for wordStr,replaceStr in replaceHashTags.items():
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content=content.replace(wordStr,replaceStr)
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if not isJsonContent:
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for wordStr,replaceStr in replaceEmoji.items():
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content=content.replace(wordStr,replaceStr)
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content=addWebLinks(content)
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if longWordsList:
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content=removeLongWords(content,maxWordLength,longWordsList)
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content=content.replace(' --linebreak-- ','</p><p>')
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return '<p>'+content+'</p>'
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def getMentionsFromHtml(htmlText: str,matchStr="<span class=\"h-card\"><a href=\"") -> []:
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"""Extracts mentioned actors from the given html content string
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"""
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mentions=[]
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if matchStr not in htmlText:
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return mentions
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mentionsList=htmlText.split(matchStr)
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for mentionStr in mentionsList:
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if '"' not in mentionStr:
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continue
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actorStr=mentionStr.split('"')[0]
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if actorStr.startswith('http') or \
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actorStr.startswith('i2p') or \
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actorStr.startswith('dat:'):
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if actorStr not in mentions:
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mentions.append(actorStr)
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return mentions
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def extractMediaInFormPOST(postBytes,boundary,name: str):
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"""Extracts the binary encoding for image/video/audio within a http form POST
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Returns the media bytes and the remaining bytes
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"""
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imageStartBoundary=b'Content-Disposition: form-data; name="'+name.encode('utf8', 'ignore')+b'";'
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imageStartLocation=postBytes.find(imageStartBoundary)
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if imageStartLocation==-1:
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return None,postBytes
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|
|
|
# bytes after the start boundary appears
|
|
mediaBytes=postBytes[imageStartLocation:]
|
|
|
|
# look for the next boundary
|
|
imageEndBoundary=boundary.encode('utf8', 'ignore')
|
|
imageEndLocation=mediaBytes.find(imageEndBoundary)
|
|
if imageEndLocation==-1:
|
|
# no ending boundary
|
|
return mediaBytes,postBytes[:imageStartLocation]
|
|
|
|
# remaining bytes after the end of the image
|
|
remainder=mediaBytes[imageEndLocation:]
|
|
|
|
# remove bytes after the end boundary
|
|
mediaBytes=mediaBytes[:imageEndLocation]
|
|
|
|
# return the media and the before+after bytes
|
|
return mediaBytes,postBytes[:imageStartLocation]+remainder
|
|
|
|
def saveMediaInFormPOST(mediaBytes,debug: bool, \
|
|
filenameBase=None) -> (str,str):
|
|
"""Saves the given media bytes extracted from http form POST
|
|
Returns the filename and attachment type
|
|
"""
|
|
if not mediaBytes:
|
|
if debug:
|
|
print('DEBUG: No media found within POST')
|
|
return None,None
|
|
|
|
mediaLocation=-1
|
|
searchStr=''
|
|
filename=None
|
|
|
|
# directly search the binary array for the beginning
|
|
# of an image
|
|
extensionList= {
|
|
'png': 'image/png',
|
|
'jpeg': 'image/jpeg',
|
|
'gif': 'image/gif',
|
|
'webp': 'image/webp',
|
|
'mp4': 'video/mp4',
|
|
'ogv': 'video/ogv',
|
|
'mp3': 'audio/mpeg',
|
|
'ogg': 'audio/ogg'
|
|
}
|
|
detectedExtension=None
|
|
for extension,contentType in extensionList.items():
|
|
searchStr=b'Content-Type: '+contentType.encode('utf8', 'ignore')
|
|
mediaLocation=mediaBytes.find(searchStr)
|
|
if mediaLocation>-1:
|
|
if extension=='jpeg':
|
|
extension='jpg'
|
|
elif extension=='mpeg':
|
|
extension='mp3'
|
|
filename=filenameBase+'.'+extension
|
|
attachmentMediaType= \
|
|
searchStr.decode().split('/')[0].replace('Content-Type: ','')
|
|
detectedExtension=extension
|
|
break
|
|
|
|
if not filename:
|
|
return None,None
|
|
|
|
# locate the beginning of the image, after any
|
|
# carriage returns
|
|
startPos=mediaLocation+len(searchStr)
|
|
for offset in range(1,8):
|
|
if mediaBytes[startPos+offset]!=10:
|
|
if mediaBytes[startPos+offset]!=13:
|
|
startPos+=offset
|
|
break
|
|
|
|
# remove any existing image files with a different format
|
|
extensionTypes=('png','jpg','jpeg','gif','webp')
|
|
for ex in extensionTypes:
|
|
if ex==detectedExtension:
|
|
continue
|
|
possibleOtherFormat=filename.replace('.temp','').replace('.'+detectedExtension,'.'+ex)
|
|
if os.path.isfile(possibleOtherFormat):
|
|
os.remove(possibleOtherFormat)
|
|
|
|
fd = open(filename, 'wb')
|
|
fd.write(mediaBytes[startPos:])
|
|
fd.close()
|
|
|
|
return filename,attachmentMediaType
|
|
|
|
def extractTextFieldsInPOST(postBytes,boundary,debug: bool) -> {}:
|
|
"""Returns a dictionary containing the text fields of a http form POST
|
|
The boundary argument comes from the http header
|
|
"""
|
|
msg = email.parser.BytesParser().parsebytes(postBytes)
|
|
if debug:
|
|
print('DEBUG: POST arriving '+msg.get_payload(decode=True).decode('utf-8'))
|
|
messageFields=msg.get_payload(decode=True).decode('utf-8').split(boundary)
|
|
fields={}
|
|
# examine each section of the POST, separated by the boundary
|
|
for f in messageFields:
|
|
if f=='--':
|
|
continue
|
|
if ' name="' not in f:
|
|
continue
|
|
postStr=f.split(' name="',1)[1]
|
|
if '"' not in postStr:
|
|
continue
|
|
postKey=postStr.split('"',1)[0]
|
|
postValueStr=postStr.split('"',1)[1]
|
|
if ';' in postValueStr:
|
|
continue
|
|
if '\r\n' not in postValueStr:
|
|
continue
|
|
postLines=postValueStr.split('\r\n')
|
|
postValue=''
|
|
if len(postLines)>2:
|
|
for line in range(2,len(postLines)-1):
|
|
if line>2:
|
|
postValue+='\n'
|
|
postValue+=postLines[line]
|
|
fields[postKey]=postValue
|
|
return fields
|