Add preliminary jobs tables into database model

Reviewed-on: #77

> Anything else to consider?

I didn't know myself, but it was interesting to find out. No, this should work as soon as deployed. Catalan already exists in the language DB, and the existance of ca.svg is already tested whenever a catalan icon is requested.

data/imgs/flags/ca.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="810" height="540">
+<rect width="810" height="540" fill="#FCDD09"/>
+<path stroke="#DA121A" stroke-width="60" d="M0,90H810m0,120H0m0,120H810m0,120H0"/>
+</svg>

ki/models.py

@@ -19,6 +19,8 @@ class User(db.Model):
 
     tokens = relationship("Token", back_populates="user")
     profile = relationship("Profile", back_populates="user")
+    jobs = relationship("Job", back_populates="owner")
+    job_responses = relationship("JobResponse",back_populates="user")
 
     def to_dict(self):
         return {"id": self.id}
@@ -146,6 +148,7 @@ class Skill(db.Model):
 
     profiles = relationship("ProfileSkill", back_populates="skill")
     searchtopics = relationship("ProfileSearchtopic", back_populates="skill")
+    jobs = relationship("JobSkill", back_populates="skill")
 
     def to_dict(self):
         return {"id": self.id, "name": self.name, "icon_url": "/skills/{}/icon".format(self.id)}
@@ -228,3 +231,69 @@ class ProfileLanguage(db.Model):
 
     def to_dict(self):
         return {"profile_id": self.profile_id, "language": self.language.to_dict(), "level": self.level}
+
+
+class Job(db.Model):
+    __tablename__ = "job"
+
+    id = Column(Integer, primary_key=True)
+    owner_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    description = Column(String(5000))
+    amount_of_people_needed = Column(Integer, nullable=False)
+    amount_of_weekhours_needed = Column(Integer)
+    amount_of_payment_hour = Column(Integer)
+    timeframeImprecise = Column(String(120))
+    remotePercent = Column(Integer)
+    location = Column(String(50))
+    beginDate = Column(DateTime)
+    endDate = Column(DateTime)
+    link = Column(String(500))
+    aidsLevel = Column(Integer)  ## Stupid Shit one has to deal with like Teams or weird Apps, Datathrower Webportals...
+    created = Column(DateTime, nullable=False, default=datetime.now)
+    updated = Column(DateTime, onupdate=datetime.now, nullable=False, default=datetime.now)
+    withdrawn = Column(DateTime, nullable=True)
+
+    owner = relationship("User", back_populates="jobs")
+    responses = relationship("JobResponse", back_populates="jobs")
+    skills = relationship("JobSkill", back_populates="job")
+    def to_dict(self):
+        return {"job_id": self.id, "owner_id": self.owner_id, "description": self.description,
+                "amount_of_people_needed": self.amount_of_people_needed, "amount_of_weekhours_needed": self.amount_of_weekhours_needed,
+                "amount_of_payment_hour": self.amount_of_payment_hour, "timeframeImprecise": self.timeframeImprecise,
+                "remotePercent": self.timeframeImprecise, "location": self.location, "beginDate": self.beginDate,
+                "endDate": self.endDate,  "link": self.link, "aidsLevel": self.aidsLevel, "created": self.created,
+                "updated": self.updated, "withdrawn": self.withdrawn
+                }
+
+class JobSkill(db.Model):
+    __tablename__ = "job_skill"
+
+    job_id = Column(Integer, ForeignKey("job.id"), primary_key=True)
+    skill_id = Column(Integer, ForeignKey("skill.id"), primary_key=True)
+    level = Column(SmallInteger, nullable=False)
+
+    job = relationship("Job", back_populates="skills")
+    skill = relationship("Skill", back_populates="jobs")
+
+    def to_dict(self):
+        return {"job_id": self.job_id, "skill": self.skill.to_dict(), "level": self.level}
+
+
+class JobResponse(db.Model):
+    __tablename__ = "job_response"
+
+    job_id = Column(Integer, ForeignKey("job.id"), primary_key=True)
+    user_id = Column(Integer, ForeignKey("user.id"), primary_key=True)
+    created = Column(DateTime, nullable=False, default=datetime.now)
+    withdrawn = Column(DateTime, nullable=True)  # no longer interested/available
+
+    job = relationship("Job", back_populates="responses")
+    user = relationship("User", back_populates="job_responses")
+
+    def to_dict(self):
+        return {
+            "job": self.job.to_dict(),
+            "user": self.user.to_dict(),
+            "created": self.created,
+            "withdrawn": self.withdrawn
+        }