models.py

import random
import datetime

from django.contrib.postgres import search
from django.core.exceptions import ValidationError
from django.core.validators import MinValueValidator, MaxValueValidator
from django.db import models
from django.utils import timezone

from authentication.models import User

VERIFICATION_STATUS = [
    ("PENDING", "Diproses"),
    ("APPROVE", "Diterima"),
    ("DISAPPROVE", "Ditolak"),
    ("REVISION", "Perbaikan"),
    ("BLOCKED", "Diblokir"),
]


# Create your models here.


def getRandomColor():
    color = "%06x" % random.randint(0, 0xFFFFFF)
    return color

def current_year():
    return datetime.date.today().year

class Category(models.Model):
    name = models.CharField(max_length=20)
    description = models.TextField(blank=False, default="")
    archived = models.BooleanField(default=False, blank=False)
    archived_by = models.ForeignKey(User, on_delete=models.SET_NULL, null=True)

    def __str__(self):
        return self.name


class MateriManager(models.Manager):
    def __init__(self, *args, **kwargs):
        self.alive_only = kwargs.pop('alive_only', True)
        super(MateriManager, self).__init__(*args, **kwargs)

    def get_queryset(self):
        if self.alive_only:
            return SoftDeletionQuerySet(self.model).filter(deleted_at=None)
        return SoftDeletionQuerySet(self.model)
        
    def search(self, search_text):
        search_vector = search.SearchVector("title", weight="A")
        search_query = search.SearchQuery(search_text)

        search_rank = search.SearchRank(search_vector, search_query)

        search_result = (
            self.get_queryset().filter(_search_vector=search_query).annotate(rank=search_rank).order_by("-rank")
        )

        return search_result

class SoftDeletionQuerySet(models.query.QuerySet):
    def delete(self):
        return super(SoftDeletionQuerySet, self).update(deleted_at=timezone.now())

class SoftDeleteModel(models.Model):
    deleted_at = models.DateTimeField(blank=True, null=True)

    all_objects = MateriManager(alive_only=False)
    
    class Meta:
        abstract = True
    
    def soft_delete(self):
        self.deleted_at = timezone.now()
        self.save()

class Materi(SoftDeleteModel):
    cover = models.ImageField()
    content = models.FileField()
    title = models.CharField(max_length=50, default="Judul")
    author = models.CharField(max_length=30, default="Penyusun")
    uploader = models.ForeignKey(User, on_delete=models.SET_NULL, null=True)
    publisher = models.CharField(max_length=30, default="Penerbit")
    release_year = models.IntegerField(default=current_year)
    pages = models.IntegerField(default=0)
    descriptions = models.TextField(default="Deskripsi")    
    status = models.CharField(max_length=30, choices=VERIFICATION_STATUS, default=VERIFICATION_STATUS[0][0])
    categories = models.ManyToManyField(Category)
    date_created = models.DateTimeField(default=timezone.now)
    date_modified = models.DateTimeField(auto_now=True)

    _search_vector = search.SearchVectorField(null=True, editable=False)

    objects = MateriManager()

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)

        if "update_fields" not in kwargs or "_search_vector" not in kwargs["update_fields"]:
            self._search_vector = search.SearchVector("title", weight="A")
            self.save(update_fields=["_search_vector"])

    @property
    def is_published(self):
        published = False
        if self.verificationreport_set.exists():
            report = self.verificationreport_set.latest("timestamp")
            published = True if report.status == "Diterima" else False
        return published

    @property
    def published_date(self):
        published_date = None
        if self.verificationreport_set.exists():
            report = self.verificationreport_set.latest("timestamp")
            if report.status == "Diterima":
                published_date = report.timestamp
        return published_date

    @property
    def like_count(self):
        count = Like.objects.filter(materi=self).count()
        return count
    
    @property
    def comment_count(self):
        count = Comment.objects.filter(materi=self).count()
        return count

    @property
    def is_like(self):
        like = False
        if Like.objects.filter(materi=self).exists():
            like = True


class Comment(models.Model):
    username = models.CharField(max_length=100)
    profile = models.CharField(max_length=100, default=getRandomColor)
    comment = models.CharField(max_length=240, default="comments")
    materi = models.ForeignKey(Materi, models.SET_NULL, null=True)
    user = models.ForeignKey(User, on_delete=models.SET_NULL, blank=True, null=True)
    timestamp = models.DateTimeField(default=timezone.now)

    def __str__(self):
        return self.username

    @property
    def like_count(self):
        count = LikeComment.objects.filter(comment=self).count()
        return count
    
    @property
    def dislike_count(self):
        count = DislikeComment.objects.filter(comment=self).count()
        return count


class LikeComment(models.Model):
    comment = models.ForeignKey(Comment, models.SET_NULL, null=True)
    timestamp = models.DateTimeField(default=timezone.now)
    session_id = models.CharField(max_length=32, blank=False)


class DislikeComment(models.Model):
    comment = models.ForeignKey(Comment, models.SET_NULL, null=True)
    timestamp = models.DateTimeField(default=timezone.now)
    session_id = models.CharField(max_length=32, blank=False)


class Like(models.Model):
    materi = models.ForeignKey(Materi, models.SET_NULL, null=True)
    timestamp = models.DateTimeField(default=timezone.now)
    session_id = models.CharField(max_length=32, blank=False)


class ReqMaterial(models.Model):
    title = models.CharField(max_length=100)
    timestamp = models.DateTimeField(default=timezone.now)


class ViewStatistics(models.Model):
    materi = models.ForeignKey(Materi, models.SET_NULL, null=True, related_name="baca")
    timestamp = models.DateTimeField(default=timezone.now)


class DownloadStatistics(models.Model):
    materi = models.ForeignKey(Materi, models.SET_NULL, null=True, related_name="unduh")
    downloader = models.ForeignKey(User, models.SET_NULL, blank=True, null=True, related_name="riwayat_unduh")
    timestamp = models.DateTimeField(default=timezone.now)


class DummyLike(models.Model):
    item = models.ForeignKey(Like, on_delete=models.CASCADE)


class DummyViewStatistics(models.Model):
    item = models.ForeignKey(ViewStatistics, on_delete=models.CASCADE)


class DummyDownloadStatistics(models.Model):
    item = models.ForeignKey(DownloadStatistics, on_delete=models.CASCADE)


class DummyComment(models.Model):
    item = models.ForeignKey(Comment, on_delete=models.CASCADE)


class Rating(models.Model):
    materi = models.ForeignKey(Materi, models.CASCADE)
    user = models.ForeignKey(User, on_delete=models.CASCADE, blank=True)
    timestamp = models.DateTimeField(default=timezone.now)
    score = models.IntegerField()

    def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
        if 1 <= self.score <= 5:
            super().save(force_insert, force_update, using, update_fields)
        else:
            raise ValidationError("Rating score must be integer between 1-5")

    def __str__(self):
        return "Material:{} | User:{} | Rating:{}".format(self.materi.title, self.user.name, self.score)

    class Meta:
        unique_together = ["materi", "user"]


class RatingContributor(models.Model):
    timestamp = models.DateTimeField(auto_now=True)
    score = models.PositiveIntegerField(validators=[MinValueValidator(1), MaxValueValidator(5)])
    user = models.ForeignKey(User, on_delete=models.CASCADE)

    def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
        if 1 <= self.score <= 5:
            super().save(force_insert, force_update, using, update_fields)
        else:
            raise ValidationError("Rating score must be integer between 1-5")


class LaporanMateri(models.Model):
    materi = models.ForeignKey(Materi, on_delete=models.CASCADE, max_length=120)
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    laporan = models.TextField(validators=[MinValueValidator(30), MaxValueValidator(120)], default="")
    timestamp = models.DateTimeField(default=timezone.now)
    is_rejected = models.BooleanField(default=False)