pdf_generator.py

from io import BytesIO
import re
from reportlab.lib import colors
from reportlab.lib.pagesizes import A4
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, Flowable
from reportlab.lib.units import mm
from reportlab.graphics.shapes import Drawing, Rect, String, Line

class SliderFlowable(Flowable):
    def __init__(self, name, value, min_val, max_val, is_percentage=False):
        Flowable.__init__(self)
        self.name = name
        self.value = value
        self.min_val = min_val
        self.max_val = max_val
        self.is_percentage = is_percentage
        self.width = 400
        self.height = 80

    def draw(self):
        drawing = Drawing(self.width, self.height)

        # Draw slider bar
        bar = Rect(50, 30, 300, 20, fillColor=colors.HexColor("#f7fbfd"), strokeColor=colors.HexColor("#9999ff"))
        drawing.add(bar)

        # Draw slider value
        if self.max_val == self.min_val:
            value_width = 50  # or some default width
        else:
            value_width = 50 + ((self.value - self.min_val) / (self.max_val - self.min_val) * 300)
        value_bar = Rect(50, 30, value_width - 50, 20, fillColor=colors.HexColor("#9999ff"), strokeColor=None)
        drawing.add(value_bar)

        # Add slider name
        drawing.add(String(0, 60, self.name, fontSize=12, fillColor=colors.HexColor("#26004d")))

        # Add range labels
        min_str = self.format_value(self.min_val)
        max_str = self.format_value(self.max_val)
        drawing.add(String(40, 10, min_str, fontSize=10, fillColor=colors.HexColor("#26004d")))
        drawing.add(String(340, 10, max_str, fontSize=10, fillColor=colors.HexColor("#26004d")))

        # Add value label
        value_str = self.format_value(self.value)
        drawing.add(String(value_width - 20, 55, value_str, fontSize=10, fillColor=colors.HexColor("#26004d")))

        # Add value marker
        drawing.add(Line(value_width, 25, value_width, 55, strokeColor=colors.HexColor("#26004d"), strokeWidth=2))

        drawing.drawOn(self.canv, 0, 0)

    def format_value(self, val):
        if self.is_percentage:
            return f"{val:.1f}%"
        elif isinstance(val, int):
            return f"{val}"
        else:
            return f"{val:.2f}"

def create_styles():
    styles = getSampleStyleSheet()
    styles['Title'].fontName = 'Helvetica-Bold'
    styles['Title'].fontSize = 18
    styles['Title'].spaceAfter = 16
    styles['Title'].textColor = colors.HexColor("#26004d")

    styles['Heading1'].fontName = 'Helvetica-Bold'
    styles['Heading1'].fontSize = 16
    styles['Heading1'].spaceAfter = 10
    styles['Heading1'].textColor = colors.HexColor("#3b0b75")

    styles['Heading2'].fontName = 'Helvetica'
    styles['Heading2'].fontSize = 14
    styles['Heading2'].spaceAfter = 12
    styles['Heading2'].textColor = colors.HexColor("#52176a")

    styles['BodyText'].fontName = 'Helvetica'
    styles['BodyText'].fontSize = 12
    styles['BodyText'].spaceAfter = 12
    styles['BodyText'].textColor = colors.HexColor("#26004d")

    styles.add(ParagraphStyle(
        name='Answer',
        parent=styles['BodyText'],
        backColor=colors.HexColor("#f0f2fd"),
        borderColor=colors.HexColor("#9999ff"),
        borderWidth=0.5,
        borderPadding=(5, 5, 5, 5),
        spaceAfter=10
    ))

    return styles

def create_page_template(canvas, doc):
    canvas.saveState()
    canvas.setFillColor(colors.HexColor("#e6ebfb"))
    canvas.rect(0, 0, doc.pagesize[0], doc.pagesize[1], fill=1)
    canvas.setFillColor(colors.HexColor("#26004d"))
    canvas.setFont('Helvetica', 9)
    canvas.drawString(30, 20, f"Page {doc.page}")
    canvas.restoreState()

def generate_pdf(session_state):
    buffer = BytesIO()
    doc = SimpleDocTemplate(buffer, pagesize=A4, rightMargin=20*mm, leftMargin=20*mm, topMargin=20*mm, bottomMargin=20*mm)
    styles = create_styles()
    story = [Paragraph("AI Trust and Opacity Evaluation", styles['Title'])]

    pages = session_state.pages
    answers = session_state.answers

    for page in pages[:-1]:  # Skip the last page
        if 'input_key' in page and page['input_key'] is not None:
            story.append(Paragraph(page['title'], styles['Heading1']))
            story.append(Paragraph(page['content'], styles['BodyText']))

            answer = answers.get(page['input_key'], "")
            if isinstance(answer, list):
                answer = ', '.join(answer)

            if page.get('input_type') == 'combined':
                option = answers.get(page['input_key'], "")
                conclusion = answers.get(f"{page['input_key']}_conclusion", "")
                answer = f"Option selected: {option}\n\nConclusion: {conclusion}"

            # Create a table for the answer to allow multi-line text within a block
            data = [[Paragraph(answer, styles['Answer'])]]
            t = Table(data, colWidths=[450])
            t.setStyle(TableStyle([
                ('BACKGROUND', (0, 0), (-1, -1), colors.HexColor("#f0f2fd")),
                ('TEXTCOLOR', (0, 0), (-1, -1), colors.HexColor("#26004d")),
                ('ALIGN', (0, 0), (-1, -1), 'LEFT'),
                ('VALIGN', (0, 0), (-1, -1), 'TOP'),
                ('INNERGRID', (0, 0), (-1, -1), 0.25, colors.HexColor("#9999ff")),
                ('BOX', (0, 0), (-1, -1), 0.25, colors.HexColor("#9999ff")),
            ]))
            story.append(t)
            story.append(Spacer(1, 12))

            # Add quantitative criteria visualization if applicable
            if page['input_key'] in ['technological_literacy', 'cognitive_mismatch']:
                story.extend(process_quantitative_criteria(answer, styles))

    doc.build(story, onFirstPage=create_page_template, onLaterPages=create_page_template)
    buffer.seek(0)
    return buffer

def process_quantitative_criteria(answer, styles):
    story = []
    lines = answer.split('\n')
    for line in lines:
        parsed = parse_quantitative_criteria(line)
        if parsed:
            name, value, min_val, max_val, is_percentage = parsed
            slider = SliderFlowable(name, value, min_val, max_val, is_percentage)
            story.append(slider)
    return story

def parse_quantitative_criteria(input_string):
    # Match "Name: value [min-max]" format
    match = re.match(r'(.+?):\s*([-+]?(?:\d*\.*\d+)(?:%)?)\s*\[([-+]?(?:\d*\.*\d+)(?:%)?)\s*-\s*([-+]?(?:\d*\.*\d+)(?:%)?)?\]', input_string)
    if match:
        name, value, min_val, max_val = match.groups()
        name = name.strip()

        # Handle percentage inputs
        is_percentage = '%' in value or '%' in min_val or '%' in max_val

        # Convert values to appropriate types
        if is_percentage:
            value = float(value.rstrip('%'))
            min_val = float(min_val.rstrip('%'))
            max_val = float(max_val.rstrip('%'))
        else:
            value = float(value)
            min_val = float(min_val)
            max_val = float(max_val)

        # Convert to int if all values are whole numbers
        if all(v.is_integer() for v in [value, min_val, max_val]):
            value, min_val, max_val = int(value), int(min_val), int(max_val)

        return name, value, min_val, max_val, is_percentage
    return None