sim-lib-server 0.1.0-rc.1

SIM workspace package for sim lib server.
Documentation 
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use sim_cookbook::{RecipeCard, RecipeRun, RecipeStore, ordered_cards, search, view};

pub(crate) fn render_error_json(message: &str) -> String {
    let mut body = String::from("{\"error\":");
    push_json_str(&mut body, message);
    body.push('}');
    body
}

pub(crate) fn render_index_json(store: &RecipeStore) -> String {
    let mut out = String::from("{\"books\":[");
    let cookbook = view(store);
    for (book_index, book) in cookbook.books.iter().enumerate() {
        comma(&mut out, book_index);
        out.push_str("{\"id\":");
        push_json_str(&mut out, &book.id);
        out.push_str(",\"title\":");
        push_json_str(&mut out, &book.title);
        out.push_str(",\"chapters\":[");
        for (chapter_index, chapter) in book.chapters.iter().enumerate() {
            comma(&mut out, chapter_index);
            out.push_str("{\"name\":");
            push_json_str(&mut out, &chapter.name);
            out.push_str(",\"title\":");
            push_json_str(&mut out, &chapter.title);
            out.push_str(",\"recipes\":[");
            for (recipe_index, recipe) in chapter.recipes.iter().enumerate() {
                comma(&mut out, recipe_index);
                push_recipe_summary(&mut out, recipe);
            }
            out.push_str("]}");
        }
        out.push_str("]}");
    }
    out.push_str("],\"recipes\":[");
    for (index, card) in ordered_cards(store).iter().enumerate() {
        comma(&mut out, index);
        push_recipe_summary(&mut out, card);
    }
    out.push_str("]}");
    out
}

pub(crate) fn render_search_json(store: &RecipeStore, query: &str) -> String {
    let mut out = String::from("{\"query\":");
    push_json_str(&mut out, query);
    out.push_str(",\"recipes\":[");
    for (index, card) in search(store, query).iter().enumerate() {
        comma(&mut out, index);
        push_recipe_summary(&mut out, card);
    }
    out.push_str("]}");
    out
}

pub(crate) fn render_recipe_json(store: &RecipeStore, card: &RecipeCard) -> String {
    let mut out = String::from("{\"id\":");
    push_json_str(&mut out, &card.id);
    out.push_str(",\"title\":");
    push_json_str(&mut out, &card.title);
    out.push_str(",\"book\":");
    push_json_str(&mut out, &card.book);
    out.push_str(",\"chapter\":");
    push_json_str(&mut out, &card.chapter);
    out.push_str(",\"codec\":");
    push_json_str(&mut out, &card.codec);
    out.push_str(",\"purpose\":");
    push_json_str(&mut out, &card.purpose);
    out.push_str(",\"setup\":");
    push_json_str(&mut out, &String::from_utf8_lossy(&card.setup));
    out.push_str(",\"requires\":");
    push_json_array(&mut out, &card.requires);
    out.push_str(",\"tags\":");
    push_json_array(&mut out, &card.tags);
    out.push_str(",\"next\":");
    if let Some(next) = sim_cookbook::next(store, &card.id) {
        push_json_str(&mut out, &next.id);
    } else {
        out.push_str("null");
    }
    out.push('}');
    out
}

pub(crate) fn render_run_json(run: &RecipeRun) -> String {
    let mut out = String::from("{\"recipe\":");
    push_json_str(&mut out, &run.recipe);
    out.push_str(",\"ok\":");
    out.push_str(if run.ok { "true" } else { "false" });
    out.push_str(",\"forms\":");
    out.push_str(&run.forms.to_string());
    out.push_str(",\"results\":");
    push_json_array(&mut out, &run.results);
    out.push_str(",\"checks\":[");
    for (index, check) in run.checks.iter().enumerate() {
        comma(&mut out, index);
        out.push_str("{\"form\":");
        out.push_str(&check.form.to_string());
        out.push_str(",\"expected\":");
        push_json_str(&mut out, &check.expected);
        out.push_str(",\"actual\":");
        push_json_str(&mut out, &check.actual);
        out.push_str(",\"pass\":");
        out.push_str(if check.pass { "true" } else { "false" });
        out.push('}');
    }
    out.push_str("]}");
    out
}

fn push_recipe_summary(out: &mut String, card: &RecipeCard) {
    out.push_str("{\"id\":");
    push_json_str(out, &card.id);
    out.push_str(",\"title\":");
    push_json_str(out, &card.title);
    out.push_str(",\"book\":");
    push_json_str(out, &card.book);
    out.push_str(",\"chapter\":");
    push_json_str(out, &card.chapter);
    out.push('}');
}

fn push_json_array(out: &mut String, items: &[String]) {
    out.push('[');
    for (index, item) in items.iter().enumerate() {
        comma(out, index);
        push_json_str(out, item);
    }
    out.push(']');
}

fn push_json_str(out: &mut String, text: &str) {
    out.push('"');
    for ch in text.chars() {
        match ch {
            '"' => out.push_str("\\\""),
            '\\' => out.push_str("\\\\"),
            '\n' => out.push_str("\\n"),
            '\r' => out.push_str("\\r"),
            '\t' => out.push_str("\\t"),
            ch if ch < ' ' => out.push_str(&format!("\\u{:04x}", ch as u32)),
            ch => out.push(ch),
        }
    }
    out.push('"');
}

fn comma(out: &mut String, index: usize) {
    if index > 0 {
        out.push(',');
    }
}