designcraft/crates/engine/src/cmd/editorial.rs

//! Type › Notes: editorial notes anchored in text (never printed or exported).

use std::sync::Arc;

use designcraft_doc::{EditorialNote, NOTE_MARK, StoryId};
use serde_json::{Value, json};

use super::{CommandSpec, bad, cmd, has_doc, has_text, ok, str_param};
use crate::Result;

pub fn specs() -> Vec<CommandSpec> {
    vec![
        cmd!("note.new", "New Note", ["Type", "Notes"], None, "{text, author?} — at the insertion point → {story, id}", has_text, |s, p| {
            let st = s.doc()?;
            let ts = st.selection.text.ok_or_else(|| bad("note.new", "place the insertion point in text"))?;
            if ts.cell.is_some() {
                return Err(bad("note.new", "notes go in story text"));
            }
            let text = str_param(p, "text").unwrap_or("").to_string();
            let author = str_param(p, "author").unwrap_or("").to_string();
            let at = ts.anchor.max(ts.focus);
            s.edit(|d, sel| {
                let story = d.story_mut(ts.story).ok_or_else(|| bad("note.new", "no such story"))?;
                let fmt = story.char_format_at(at).clone();
                story.insert_with(at, &NOTE_MARK.to_string(), fmt);
                let k = story.text[..at].matches(NOTE_MARK).count();
                let n = Arc::make_mut(&mut story.editorial[k]);
                (n.text, n.author) = (text, author);
                let id = n.id;
                if let Some(t) = &mut sel.text {
                    let c = at + NOTE_MARK.len_utf8();
                    (t.anchor, t.focus) = (c, c);
                }
                Ok(json!({"story": ts.story.0, "id": id}))
            })
        }),
        cmd!("note.edit", "Edit Note", [], None, "{story, id, text?, author?}", has_doc, |s, p| {
            let (sid, id) = target(p)?;
            let (text, author) = (str_param(p, "text").map(str::to_string), str_param(p, "author").map(str::to_string));
            s.edit(|d, _| {
                let st = d.story_mut(sid).ok_or_else(|| bad("note.edit", "no such story"))?;
                let n = st.editorial.iter_mut().find(|n| n.id == id).ok_or_else(|| bad("note.edit", format!("no note {id}")))?;
                let n = Arc::make_mut(n);
                if let Some(t) = text {
                    n.text = t;
                }
                if let Some(a) = author {
                    n.author = a;
                }
                st.rev += 1;
                ok()
            })
        }),
        cmd!("note.delete", "Delete Note", ["Type", "Notes"], None, "{story, id}", has_doc, |s, p| {
            let (sid, id) = target(p)?;
            s.edit(|d, _| {
                let st = d.story_mut(sid).ok_or_else(|| bad("note.delete", "no such story"))?;
                let at = anchor(st, id).ok_or_else(|| bad("note.delete", format!("no note {id}")))?;
                st.delete(at..at + NOTE_MARK.len_utf8());
                ok()
            })
        }),
        cmd!(
            "note.convertToText",
            "Convert Note to Text",
            ["Type", "Notes"],
            None,
            "{story, id} — the note's text replaces its anchor",
            has_doc,
            |s, p| {
                let (sid, id) = target(p)?;
                s.edit(|d, _| {
                    let st = d.story_mut(sid).ok_or_else(|| bad("note.convertToText", "no such story"))?;
                    let at = anchor(st, id).ok_or_else(|| bad("note.convertToText", format!("no note {id}")))?;
                    let text = st.editorial.iter().find(|n| n.id == id).map(|n| n.text.clone()).unwrap_or_default();
                    st.replace(at..at + NOTE_MARK.len_utf8(), &text);
                    ok()
                })
            }
        ),
        cmd!(query "note.list", "Notes", [], None, "{} → [{story, id, at, author, text}] in story order", has_doc, |s, _| {
            let d = &s.doc()?.doc;
            let mut out = Vec::new();
            for st in d.stories.values() {
                for (k, (at, _)) in st.text.match_indices(NOTE_MARK).enumerate() {
                    if let Some(n) = st.editorial.get(k) {
                        out.push(json!({"story": st.id.0, "id": n.id, "at": at, "author": n.author, "text": n.text}));
                    }
                }
            }
            Ok(Value::Array(out))
        }),
    ]
}

fn target(p: &Value) -> Result<(StoryId, u64)> {
    let sid = p.get("story").and_then(Value::as_u64).ok_or_else(|| bad("note", "`story` required"))?;
    let id = p.get("id").and_then(Value::as_u64).ok_or_else(|| bad("note", "`id` required"))?;
    Ok((StoryId(sid), id))
}

/// Byte offset of note `id`'s anchor.
fn anchor(st: &designcraft_doc::Story, id: u64) -> Option<usize> {
    let k = st.editorial.iter().position(|n: &Arc<EditorialNote>| n.id == id)?;
    st.text.match_indices(NOTE_MARK).nth(k).map(|(i, _)| i)
}

#[cfg(test)]
mod tests {
    use serde_json::json;

    use crate::Session;

    #[test]
    fn notes_are_anchored_unprinted_and_convertible() {
        let mut s = Session::new();
        s.execute("file.new", &json!({})).unwrap();
        let r = s.execute("frame.create", &json!({"rect": [72, 72, 400, 300], "content": "text", "text": "Draft copy."})).unwrap();
        let sid = designcraft_doc::StoryId(r["story"].as_u64().unwrap());
        let end_x = |s: &Session| s.cache.get(&s.doc().unwrap().doc, sid, None).frames[0].lines[0].end_x;
        let before = end_x(&s);
        s.execute("text.select", &json!({"story": r["story"], "anchor": 5, "focus": 5})).unwrap();
        let n = s.execute("note.new", &json!({"text": "check this", "author": "Ed"})).unwrap();
        assert!((end_x(&s) - before).abs() < 1e-6, "a note takes no space");
        let list = s.execute("note.list", &json!({})).unwrap();
        assert_eq!(list[0]["text"], "check this");
        assert_eq!(list[0]["at"], 5);
        let txt = s.execute("file.exportText", &json!({"story": r["story"]})).unwrap();
        assert_eq!(txt["text"], "Draft copy.", "not exported");
        s.execute("note.edit", &json!({"story": n["story"], "id": n["id"], "text": " (checked)"})).unwrap();
        s.execute("note.convertToText", &json!({"story": n["story"], "id": n["id"]})).unwrap();
        assert_eq!(s.doc().unwrap().doc.stories[&sid].text, "Draft (checked) copy.");
        assert!(s.doc().unwrap().doc.stories[&sid].editorial.is_empty());
    }
}