oxihuman_export/
pdf_export.rs

1// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
2// SPDX-License-Identifier: Apache-2.0
3#![allow(dead_code)]
4
5//! PDF document stub export.
6
7/// PDF page size.
8#[derive(Debug, Clone, Copy, PartialEq)]
9pub struct PdfPageSize {
10    pub width_pt: f32,
11    pub height_pt: f32,
12}
13
14impl PdfPageSize {
15    /// A4 page size in points.
16    pub fn a4() -> Self {
17        Self {
18            width_pt: 595.28,
19            height_pt: 841.89,
20        }
21    }
22
23    /// Letter page size in points.
24    pub fn letter() -> Self {
25        Self {
26            width_pt: 612.0,
27            height_pt: 792.0,
28        }
29    }
30
31    /// Area in square points.
32    pub fn area(&self) -> f32 {
33        self.width_pt * self.height_pt
34    }
35}
36
37/// A single PDF page.
38#[derive(Debug, Clone)]
39pub struct PdfPage {
40    pub size: PdfPageSize,
41    pub content: String,
42}
43
44impl PdfPage {
45    /// Create an empty page.
46    pub fn new(size: PdfPageSize) -> Self {
47        Self {
48            size,
49            content: String::new(),
50        }
51    }
52
53    /// Append a text content stream snippet.
54    pub fn append_text(&mut self, text: &str) {
55        self.content.push_str(text);
56    }
57
58    /// Whether the page has any content.
59    pub fn has_content(&self) -> bool {
60        !self.content.is_empty()
61    }
62}
63
64/// PDF document stub.
65#[derive(Debug, Clone)]
66pub struct PdfExport {
67    pub title: String,
68    pub author: String,
69    pub pages: Vec<PdfPage>,
70}
71
72impl PdfExport {
73    /// Create a new PDF document.
74    pub fn new(title: &str) -> Self {
75        Self {
76            title: title.to_string(),
77            author: String::new(),
78            pages: Vec::new(),
79        }
80    }
81
82    /// Add a page.
83    pub fn add_page(&mut self, page: PdfPage) {
84        self.pages.push(page);
85    }
86
87    /// Return page count.
88    pub fn page_count(&self) -> usize {
89        self.pages.len()
90    }
91}
92
93/// Serialize PDF header (stub).
94pub fn pdf_header_bytes() -> Vec<u8> {
95    b"%PDF-1.7\n".to_vec()
96}
97
98/// Estimate PDF file size (stub).
99pub fn estimate_pdf_bytes(doc: &PdfExport) -> usize {
100    let content_len: usize = doc.pages.iter().map(|p| p.content.len() + 256).sum();
101    512 + content_len
102}
103
104/// Validate PDF document.
105pub fn validate_pdf(doc: &PdfExport) -> bool {
106    !doc.title.is_empty() && !doc.pages.is_empty()
107}
108
109/// Serialize PDF metadata to JSON (stub).
110pub fn pdf_metadata_json(doc: &PdfExport) -> String {
111    format!(
112        "{{\"title\":\"{}\",\"author\":\"{}\",\"pages\":{}}}",
113        doc.title,
114        doc.author,
115        doc.page_count()
116    )
117}
118
119#[cfg(test)]
120mod tests {
121    use super::*;
122
123    fn sample_doc() -> PdfExport {
124        let mut doc = PdfExport::new("Mesh Report");
125        let mut p = PdfPage::new(PdfPageSize::a4());
126        p.append_text("Hello, world!");
127        doc.add_page(p);
128        doc
129    }
130
131    #[test]
132    fn test_page_count() {
133        /* page count is correct */
134        assert_eq!(sample_doc().page_count(), 1);
135    }
136
137    #[test]
138    fn test_validate_valid() {
139        /* valid document passes */
140        assert!(validate_pdf(&sample_doc()));
141    }
142
143    #[test]
144    fn test_validate_empty_title() {
145        /* empty title fails validation */
146        let doc = PdfExport::new("");
147        assert!(!validate_pdf(&doc));
148    }
149
150    #[test]
151    fn test_pdf_header_magic() {
152        /* PDF header starts with correct magic */
153        let h = pdf_header_bytes();
154        assert_eq!(&h[..4], b"%PDF");
155    }
156
157    #[test]
158    fn test_estimate_bytes_positive() {
159        /* estimated size is positive */
160        assert!(estimate_pdf_bytes(&sample_doc()) > 0);
161    }
162
163    #[test]
164    fn test_metadata_json_contains_title() {
165        /* metadata JSON contains title */
166        let json = pdf_metadata_json(&sample_doc());
167        assert!(json.contains("Mesh Report"));
168    }
169
170    #[test]
171    fn test_page_has_content() {
172        /* page with text has content */
173        let mut p = PdfPage::new(PdfPageSize::a4());
174        p.append_text("test");
175        assert!(p.has_content());
176    }
177
178    #[test]
179    fn test_a4_area() {
180        /* A4 page area is reasonable */
181        let a4 = PdfPageSize::a4();
182        assert!(a4.area() > 100_000.0);
183    }
184}
oxihuman_export/pdf_export.rs

oxihuman_export/
pdf_export.rs
