context_notation/
html.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
use pest::{iterators::Pair, Parser};

use crate::{
    code::convert_code_to_html, safety::html::unsafe_string, ContextParser, ContextParserError,
    Rule,
};

fn convert_inner_pair_to_html(pair: Pair<'_, Rule>) -> Option<String> {
    pair.into_inner()
        .next()
        .and_then(|pair| convert_pair_to_html(pair).ok())
        .and_then(|converted| converted)
}

fn convert_list_to_html(pair: Pair<'_, Rule>) -> Option<String> {
    let is_nested = match pair.as_rule() {
        Rule::List => false,
        Rule::NestedList => true,
        _ => unreachable!("Only list rules are handled here"),
    };

    let mut pairs = pair.into_inner();

    let Some(indentation) = pairs
        .next()
        .and_then(|pair| convert_pair_to_html(pair).ok())
        .and_then(|pair| pair)
    else {
        return None;
    };

    let items = pairs
        .filter_map(|pair| convert_pair_to_html(pair).unwrap_or_default())
        .map(|item| format!("<span>{indentation}{item}</span>"))
        .collect::<Vec<String>>()
        .join("&#10;");

    let suffix = if is_nested { "" } else { "&#10;" };

    Some(format!("<span class=\"list\">{}</span>{}", items, suffix))
}

fn convert_pair_to_html(pair: Pair<'_, Rule>) -> Result<Option<String>, ContextParserError> {
    Ok(Some(match pair.as_rule() {
        Rule::IgnoredUnicode | Rule::EOI => return Ok(None),

        Rule::Block
        | Rule::Span
        | Rule::Text
        | Rule::BlockContent
        | Rule::MentionBoundary
        | Rule::SlashLinkBoundary
        | Rule::HashTagBoundary
        | Rule::QuoteBoundary
        | Rule::CodeBoundary
        | Rule::InlineCodeBoundary
        | Rule::ListItemBoundary
        | Rule::WikiLinkOpenBoundary
        | Rule::WikiLinkCloseBoundary
        | Rule::LeadingInlineBoundary
        | Rule::Bridge
        | Rule::BridgeCharacter
        | Rule::TextCharacter
        | Rule::NonTextSpan
        | Rule::Contiguous
        | Rule::Terminator
        | Rule::Whitespace
        | Rule::Indentation
        | Rule::SlugSpecialCharacter
        | Rule::Protocol
        | Rule::Context => unsafe_string(pair.as_str()).into(),

        Rule::Empty => r#"<span class="empty">&#10;</span>"#.into(),
        // Rule::Empty => r#"<span class="empty"></span><br>"#.into(),
        // Rule::Empty => r#"<br>"#.into(),
        Rule::Slug => format!(
            "<span class=\"slug\">{}</span>",
            unsafe_string(pair.as_str())
        ),
        Rule::Petname => format!(
            "<span class=\"petname\">{}</span>",
            unsafe_string(pair.as_str())
        ),
        Rule::HyperLink => format!(
            "<span class=\"hyperlink\"><a href=\"{0}\" target=\"_blank\">{0}</a></span>",
            unsafe_string(pair.as_str())
        ),
        Rule::Mention => {
            let Some(petname) = convert_inner_pair_to_html(pair) else {
                return Ok(None);
            };

            format!("<span class=\"mention\">@{}</span>", petname)
        }
        Rule::SlashLink => {
            let mut pairs = pair.into_inner();
            let mut mention = None;
            let mut link = None;

            while let Some(pair) = pairs.next() {
                match pair.as_rule() {
                    Rule::Mention => {
                        mention = convert_pair_to_html(pair)?;
                    }
                    Rule::Slug => link = convert_pair_to_html(pair)?,
                    _ => return Ok(None),
                }
            }

            link.map(|link| {
                format!(
                    "<span class=\"slashlink\">{}/{}</span>",
                    mention.unwrap_or_default(),
                    link
                )
            })
            .unwrap_or_default()
        }
        Rule::HashTag => {
            let Some(slug) = convert_inner_pair_to_html(pair) else {
                return Ok(None);
            };

            format!("<span class=\"hashtag\">#{}</span>", slug)
        }
        Rule::InlineCode => {
            let Some(value) = convert_inner_pair_to_html(pair) else {
                return Ok(None);
            };

            format!("<span class=\"inlinecode\"><span class=\"fence\">`</span>{}<span class=\"fence\">`</span></span>", value)
        }
        Rule::InlineCodeValue => {
            format!(
                "<span class=\"inlinecodevalue\">{}</span>",
                unsafe_string(pair.as_str())
            )
        }
        Rule::WikiLink => {
            let Some(value) = convert_inner_pair_to_html(pair) else {
                return Ok(None);
            };

            format!("<span class=\"wikilink\">[[{}]]</span>", value)
        }
        Rule::WikiLinkValue => {
            format!(
                "<span class=\"wikilinkvalue\">{}</span>",
                unsafe_string(pair.as_str())
            )
        }
        Rule::Paragraph => {
            let content = pair
                .into_inner()
                .map(|pair| {
                    convert_pair_to_html(pair)
                        .unwrap_or_default()
                        .unwrap_or_default()
                })
                .collect::<Vec<String>>()
                .concat();

            format!("<span class=\"paragraph\">{}&#10;</span>", content)
        }
        Rule::Code => {
            let mut pairs = pair.into_inner();
            let mut slug = None;
            let mut kind = None;
            let mut code_value = None;

            while let Some(pair) = pairs.next() {
                match pair.as_rule() {
                    Rule::Slug => {
                        kind = Some(pair.as_str().to_owned());
                        slug = convert_pair_to_html(pair)?;
                    }
                    Rule::CodeValue => {
                        code_value = if let Some(kind) = kind.as_ref() {
                            let code = pair.as_str();
                            Some(
                                convert_code_to_html(kind, code)
                                    .unwrap_or_else(|| unsafe_string(code).to_string()),
                            )
                        } else {
                            Some(unsafe_string(pair.as_str()).to_string())
                        };
                    }
                    _ => return Ok(None),
                }
            }

            format!(
                    "<span class=\"code\"><span class=\"fence\">```{}</span>&#10;{}<span class=\"fence\">```</span>&#10;</span>",
                    slug.unwrap_or_default(),
                    code_value
                        .unwrap_or_default()
                )
        }
        Rule::CodeValue => {
            format!(
                "<span class=\"codevalue\">{}</span>",
                unsafe_string(pair.as_str())
            )
        }
        Rule::List | Rule::NestedList => convert_list_to_html(pair).unwrap_or_default(),
        Rule::ListIndentation => {
            if pair.as_str().len() == 0 {
                String::new()
            } else {
                format!(
                    "<span class=\"listidentation\">{}</span>",
                    pair.as_str()
                        .chars()
                        .map(|_| "&nbsp;")
                        .collect::<Vec<&str>>()
                        .concat()
                )
            }
        }
        Rule::ListItem => {
            let mut pairs = pair.into_inner();

            let Some(content) = pairs
                .next()
                .and_then(|pair| convert_pair_to_html(pair).ok())
                .and_then(|pair| pair)
            else {
                return Ok(None);
            };

            let sublist = if let Some(pair) = pairs.next() {
                convert_pair_to_html(pair)
                    .ok()
                    .and_then(|pair| pair)
                    .map(|sublist| format!("&#10;{}", sublist))
            } else {
                None
            };

            format!(
                "<span class=\"listitem\"><span class=\"listbullet\">- </span>{content}{}</span>",
                sublist.unwrap_or_default()
            )
        }
        Rule::ListItemContent => {
            let content = pair
                .into_inner()
                .filter_map(|pair| convert_pair_to_html(pair).ok().unwrap_or_default())
                .collect::<Vec<String>>()
                .concat();
            format!("<span class=\"listitemcontent\">{content}</span>")
        }
        Rule::Quote => {
            let lines = pair
                .into_inner()
                .filter_map(|pair| convert_pair_to_html(pair).unwrap_or_default())
                .collect::<Vec<String>>()
                .concat();
            // .join("<br>");

            format!("<span class=\"quote\">{lines}</span>")
        }
        Rule::QuoteLine => {
            // let content
            let content = pair
                .into_inner()
                .filter_map(|pair| convert_pair_to_html(pair).ok().unwrap_or_default())
                .collect::<Vec<String>>()
                .concat();
            format!("<span class=\"quoteline\">&gt; <span class=\"quotelinecontent\">{content}</span></span>&#10;")
        }
    }))
}

pub fn convert_block_to_html(value: &str) -> Result<String, ContextParserError> {
    let mut root = ContextParser::parse(Rule::Block, value)
        .map_err(|error| ContextParserError::ParseError(format!("{error}")))?;
    if let Some(pair) = root.next() {
        Ok(convert_pair_to_html(pair)?.unwrap_or_default())
    } else {
        Ok(String::new())
    }
}

pub fn convert_document_to_html(value: &str) -> Result<Vec<String>, ContextParserError> {
    let root = ContextParser::parse(Rule::Context, value)
        .map_err(|error| ContextParserError::ParseError(format!("{error}")))?;
    let mut html = Vec::<String>::new();

    for context in root {
        for block in context.into_inner() {
            // println!("{:?}: {:#?}", block.as_rule(), block);
            if let Some(html_chunk) = convert_pair_to_html(block)? {
                // println!("HTML: {}", html_chunk);
                html.push(html_chunk);
            }
        }
    }

    Ok(html)
}

#[cfg(test)]
mod tests {
    use crate::html::{convert_block_to_html, convert_document_to_html};

    #[test]
    fn it_converts_a_basic_paragraph_to_html() {
        let html = convert_block_to_html("Hello, world!").unwrap();
        assert_eq!(html, "<span class=\"paragraph\">Hello, world!&#10;</span>");
    }

    #[test]
    fn it_converts_multiple_basic_paragraphs_to_html() {
        let html = convert_document_to_html("Hello, \nworld!").unwrap();
        assert_eq!(
            html,
            vec![
                "<span class=\"paragraph\">Hello, &#10;</span>",
                "<span class=\"paragraph\">world!&#10;</span>"
            ]
        )
    }

    #[test]
    fn it_converts_a_complex_paragraph_to_html() {
        let html = convert_block_to_html(
            "Hello, world! This #paragraph contains /interesting/content. [[Cool Stuff]].",
        )
        .unwrap();
        assert_eq!(
                html,
                "<span class=\"paragraph\">Hello, world! This <span class=\"hashtag\">#<span class=\"slug\">paragraph</span></span> contains <span class=\"slashlink\">/<span class=\"slug\">interesting&#x2F;content</span></span>. <span class=\"wikilink\">[[<span class=\"wikilinkvalue\">Cool Stuff</span>]]</span>.&#10;</span>"
            );
    }

    #[test]
    fn it_converts_a_basic_list_to_html() {
        let html = convert_block_to_html(
            r#"- foo
- bar
- baz"#,
        )
        .unwrap();
        assert_eq!(
                html,
                "<span class=\"list\"><span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">foo</span></span></span>&#10;<span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">bar</span></span></span>&#10;<span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">baz</span></span></span></span>&#10;"
            );
    }

    #[test]
    fn it_converts_a_basic_nested_list_to_html() {
        let html = convert_block_to_html(
            r#"- foo
  - bar
- baz"#,
        )
        .unwrap();
        assert_eq!(
                html,
                "<span class=\"list\"><span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">foo</span>&#10;<span class=\"list\"><span><span class=\"listidentation\">&nbsp;&nbsp;</span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">bar</span></span></span></span></span></span>&#10;<span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">baz</span></span></span></span>&#10;"
            );
    }

    #[test]
    fn it_converts_the_project_example_to_html() {
        let html = convert_document_to_html(include_str!("../example.context")).unwrap();
        println!("{:#?}", html);

        assert_eq!(html, vec![
            "<span class=\"paragraph\">This is a paragraph. It can contain <span class=\"slashlink\">/<span class=\"slug\">slashlinks</span></span>. It may contain <span class=\"mention\">@<span class=\"petname\">mentions</span></span> and so <span class=\"slashlink\"><span class=\"mention\">@<span class=\"petname\">may</span></span>/<span class=\"slug\">slash&#x2F;links</span></span>. It may also contain <span class=\"hashtag\">#<span class=\"slug\">hashtags</span></span>. It may also contain <span class=\"hyperlink\"><a href=\"https:&#x2F;&#x2F;hyper.links\" target=\"_blank\">https:&#x2F;&#x2F;hyper.links</a></span>. It may also contain <span class=\"wikilink\">[[<span class=\"wikilinkvalue\">wiki-style links</span>]]</span>. It may also contain <span class=\"inlinecode\">`<span class=\"inlinecodevalue\">code blocks</span>`</span>.&#10;</span>",
            "<span class=\"empty\">&#10;</span>",
            "<span class=\"list\"><span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">This is a list</span></span></span>&#10;<span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">It can have several items</span>&#10;<span class=\"list\"><span><span class=\"listidentation\">&nbsp;&nbsp;</span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">The items can have nested lists</span></span></span>&#10;<span><span class=\"listidentation\">&nbsp;&nbsp;</span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">With multiple items</span>&#10;<span class=\"list\"><span><span class=\"listidentation\">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">They can be nested as deep as you like</span></span></span></span></span></span></span></span></span>&#10;<span><span class=\"listitem\"><span class=\"listbullet\">- </span><span class=\"listitemcontent\">With <span class=\"hashtag\">#<span class=\"slug\">all</span></span> the <span class=\"slashlink\">/<span class=\"slug\">same</span></span> <span class=\"slashlink\"><span class=\"mention\">@<span class=\"petname\">content</span></span>/<span class=\"slug\">types</span></span> as <span class=\"hyperlink\"><a href=\"http:&#x2F;&#x2F;a.paragraph\" target=\"_blank\">http:&#x2F;&#x2F;a.paragraph</a></span></span></span></span></span>&#10;",
            "<span class=\"empty\">&#10;</span>",
            "<span class=\"quote\"><span class=\"quoteline\">&gt; <span class=\"quotelinecontent\">This is a quote block</span></span>&#10;<span class=\"quoteline\">&gt; <span class=\"quotelinecontent\">It may be spread across several lines</span></span>&#10;<span class=\"quoteline\">&gt; <span class=\"quotelinecontent\">and may include <span class=\"hashtag\">#<span class=\"slug\">the</span></span> <span class=\"mention\">@<span class=\"petname\">same</span></span> <span class=\"slashlink\"><span class=\"mention\">@<span class=\"petname\">kinds</span></span>/<span class=\"slug\">of</span></span> <span class=\"hyperlink\"><a href=\"https:&#x2F;&#x2F;content.as&#x2F;a?paragraph\" target=\"_blank\">https:&#x2F;&#x2F;content.as&#x2F;a?paragraph</a></span></span></span>&#10;</span>",
            "<span class=\"empty\">&#10;</span>",
            "<span class=\"code\"><span class=\"fence\">```</span>&#10;&#x2F;&#x2F; This is a code block\n&#x2F;&#x2F; It can contain arbitrary text\n&#x2F;&#x2F; spread across many lines\nprint(&quot;Hi!&quot;);\n<span class=\"fence\">```</span></span>",
            "<span class=\"empty\">&#10;</span>",
            "<span class=\"code\"><span class=\"fence\">```<span class=\"slug\">rust</span></span>&#10;<span class=\"comment\">&#x2F;&#x2F; A code block may be tagged</span>&#10;<span class=\"keyword\">fn</span> <span class=\"function\">main</span>() {&#10;  <span class=\"macro\">println!</span>(<span class=\"string\">&quot;Hi!&quot;</span>);&#10;}&#10;<span class=\"fence\">```</span></span>",
        ]);
    }
}