app/querybuilder.py

   1 from .models import db, PackageType, Package, ForumTopic, License
   2 from .utils import isNo
   3 from sqlalchemy.sql.expression import func
   4 from flask import abort
   5
   6 class QueryBuilder:
   7         title  = None
   8         types  = None
   9         search = None
  10
  11         def __init__(self, args):
  12                 title = "Packages"
  13
  14                 # Get request types
  15                 types = args.getlist("type")
  16                 types = [PackageType.get(tname) for tname in types]
  17                 types = [type for type in types if type is not None]
  18                 if len(types) > 0:
  19                         title = ", ".join([type.value + "s" for type in types])
  20
  21                 self.title  = title
  22                 self.types  = types
  23                 self.search = args.get("q")
  24                 self.random = "random" in args
  25                 self.lucky  = self.random or "lucky" in args
  26                 self.hide_nonfree = isNo(args.get("nonfree"))
  27                 self.limit  = 1 if self.lucky else None
  28                 self.order_by  = args.get("sort") or "score"
  29                 self.order_dir = args.get("order") or "desc"
  30
  31                 if self.search is not None and self.search.strip() == "":
  32                         self.search = None
  33
  34         def buildPackageQuery(self):
  35                 query = Package.query.filter_by(soft_deleted=False, approved=True)
  36
  37                 if len(self.types) > 0:
  38                         query = query.filter(Package.type.in_(self.types))
  39
  40                 if self.search:
  41                         query = query.filter(Package.title.ilike('%' + self.search + '%'))
  42
  43                 if self.random:
  44                         query = query.order_by(func.random())
  45                 else:
  46                         to_order = None
  47                         if self.order_by == "score":
  48                                 to_order = Package.score
  49                         elif self.order_by == "created_at":
  50                                 to_order = Package.created_at
  51                         else:
  52                                 abort(400)
  53
  54                         if self.order_dir == "asc":
  55                                 to_order = db.asc(to_order)
  56                         elif self.order_dir == "desc":
  57                                 to_order = db.desc(to_order)
  58                         else:
  59                                 abort(400)
  60
  61                         query = query.order_by(to_order)
  62
  63                 if self.hide_nonfree:
  64                         query = query.filter(Package.license.has(License.is_foss == True))
  65                         query = query.filter(Package.media_license.has(License.is_foss == True))
  66
  67                 if self.limit:
  68                         query = query.limit(self.limit)
  69
  70                 return query
  71
  72         def buildTopicQuery(self):
  73                 topics = ForumTopic.query \
  74                                 .filter(~ db.exists().where(Package.forums==ForumTopic.topic_id)) \
  75                                 .order_by(db.asc(ForumTopic.wip), db.asc(ForumTopic.name), db.asc(ForumTopic.title))
  76
  77                 if self.search:
  78                         topics = topics.filter(ForumTopic.title.ilike('%' + self.search + '%'))
  79
  80                 if len(self.types) > 0:
  81                         topics = topics.filter(ForumTopic.type.in_(self.types))
  82
  83                 if self.limit:
  84                         topics = topics.limit(self.limit)
  85
  86                 return topics