website/hub/services/models/base.py

from django.db import models
from django.core.exceptions import ValidationError
from django.utils.text import slugify
from django_prose_editor.fields import ProseEditorField
import mimetypes
import xml.etree.ElementTree as ET


# Centralized ProseEditorField configuration
PROSE_EDITOR_CONFIG = {
    "extensions": {
        "Bold": True,
        "Italic": True,
        "Strike": True,
        "Underline": True,
        "HardBreak": True,
        "Heading": {"levels": [1, 2, 3, 4, 5, 6]},
        "BulletList": True,
        "OrderedList": True,
        "Blockquote": True,
        "Link": True,
        "Table": True,
        "History": True,
        "HTML": True,
        "Typographic": True,
    },
    "sanitize": True,
}


def get_prose_editor_field(**kwargs):
    """
    Returns a ProseEditorField with the standard configuration.
    Additional kwargs can be passed to override or add field options.
    """
    config = PROSE_EDITOR_CONFIG.copy()
    config.update(kwargs)
    return ProseEditorField(**config)


def validate_image_size(value, mb=1):
    filesize = value.size
    if filesize > mb * 1024 * 1024:
        raise ValidationError(f"Maximum file size is {mb} MB")


def validate_image_or_svg(value):
    """
    Validate that the uploaded file is either a valid image or SVG file.
    """
    # Check file size first
    validate_image_size(value)

    # Get the file extension and MIME type
    filename = value.name.lower()
    mime_type, _ = mimetypes.guess_type(filename)

    # List of allowed image formats
    allowed_image_types = [
        "image/jpeg",
        "image/png",
        "image/gif",
        "image/webp",
        "image/bmp",
        "image/tiff",
        "image/svg+xml",
    ]

    # Check if it's an SVG file
    if filename.endswith(".svg") or mime_type == "image/svg+xml":
        try:
            # Reset file pointer and read content
            value.seek(0)
            content = value.read()
            value.seek(0)  # Reset for later use

            # Try to parse as XML to ensure it's valid SVG
            ET.fromstring(content)
            return  # Valid SVG
        except ET.ParseError:
            raise ValidationError("Invalid SVG file format")

    # For non-SVG files, check MIME type
    if mime_type not in allowed_image_types:
        raise ValidationError(
            f"Unsupported file type. Allowed types: JPEG, PNG, GIF, WebP, BMP, TIFF, SVG"
        )


class Currency(models.TextChoices):
    CHF = "CHF", "Swiss Franc"
    EUR = "EUR", "Euro"
    USD = "USD", "US Dollar"


class Term(models.TextChoices):
    MTH = "MTH", "per Month (30d)"
    DAY = "DAY", "per Day"
    HR = "HR", "per Hour"
    MIN = "MIN", "per Minute"


class Unit(models.TextChoices):
    GIB = "GIB", "GiB"
    MIB = "MIB", "MiB"
    CPU = "CPU", "vCPU"


class PartnerCategory(models.TextChoices):
    CONSULTING = "CONSULTING", "Consulting"
    TRAINING = "TRAINING", "Training"


# This should be a relation, but for now this is good enough :TM:
class ManagedServiceProvider(models.TextChoices):
    VS = "VS", "VSHN"


class ReusableText(models.Model):
    name = models.CharField(max_length=100)
    textsnippet = models.ForeignKey(
        "self",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="children",
    )
    text = get_prose_editor_field()

    class Meta:
        ordering = ["name"]

    def __str__(self):
        return self.name

    def get_full_text(self):
        """Returns the text with all nested textsnippet content recursively included in reverse order"""
        text_parts = []

        # Recursively collect all text parts
        def collect_text(snippet):
            if snippet is None:
                return
            collect_text(snippet.textsnippet)  # Collect deepest snippets first
            text_parts.append(snippet.text)

        # Start collection with the deepest snippets
        collect_text(self.textsnippet)

        # Add the main text at the end
        text_parts.append(self.text)

        # Join all text parts
        return "".join(text_parts)


class Category(models.Model):
    name = models.CharField(max_length=100)
    slug = models.SlugField(unique=True)
    parent = models.ForeignKey(
        "self", on_delete=models.CASCADE, null=True, blank=True, related_name="children"
    )
    description = models.TextField(blank=True)
    order = models.IntegerField(default=0)

    class Meta:
        verbose_name = "Service Category"
        verbose_name_plural = "Service Categories"
        ordering = ["order", "name"]

    def __str__(self):
        if self.parent:
            return f"{self.parent} > {self.name}"
        return self.name

    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.name)
        super().save(*args, **kwargs)

    @property
    def full_path(self):
        path = [self.name]
        parent = self.parent
        while parent:
            path.append(parent.name)
            parent = parent.parent
        return " > ".join(reversed(path))