365 lines
12 KiB
Rust
365 lines
12 KiB
Rust
use std::collections::{HashMap, HashSet};
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/// get frontmatter from markdown document
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#[must_use]
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pub fn get_frontmatter(markdown: &str) -> Option<String> {
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let frontmatter_regex = regex::Regex::new(r"(?s)^---\s*\n(.*?)\n---").unwrap();
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frontmatter_regex.captures(markdown).and_then(|captures| {
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let frontmatter = captures.get(1).map(|m| m.as_str().to_string());
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frontmatter
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})
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}
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trait ToYaml {
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fn to_yaml(&self) -> serde_yaml::Value;
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}
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impl ToYaml for serde_json::Value {
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fn to_yaml(&self) -> serde_yaml::Value {
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let str = serde_yaml::to_string(self).unwrap();
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serde_yaml::from_str(&str).unwrap()
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}
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}
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trait ToJson {
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fn to_json(&self) -> serde_json::Value;
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}
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impl ToJson for serde_yaml::Value {
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fn to_json(&self) -> serde_json::Value {
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let str = serde_json::to_string(self).unwrap();
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serde_json::from_str(&str).unwrap()
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}
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}
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/// get inline #tags from markdown file
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#[must_use]
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pub fn get_inline_tags(markdown: &str) -> Vec<String> {
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let tag_regex = regex::Regex::new(r"#(\w+)").unwrap();
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let mut tags: Vec<String> = vec![];
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for captures in tag_regex.captures_iter(markdown) {
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if let Some(tag) = captures.get(1) {
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tags.push(tag.as_str().to_string());
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}
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}
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tags
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}
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fn system_time_to_date_time(t: std::time::SystemTime) -> chrono::DateTime<chrono::Utc> {
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let (sec, nsec) = match t.duration_since(std::time::UNIX_EPOCH) {
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Ok(dur) => (dur.as_secs() as i64, dur.subsec_nanos()),
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Err(e) => {
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// unlikely but should be handled
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let dur = e.duration();
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let (sec, nsec) = (dur.as_secs() as i64, dur.subsec_nanos());
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if nsec == 0 {
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(-sec, 0)
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} else {
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(-sec - 1, 1_000_000_000 - nsec)
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}
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}
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};
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chrono::TimeZone::timestamp_opt(&chrono::Utc, sec, nsec).unwrap()
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}
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#[derive(Debug, Clone)]
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pub struct Document {
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pub path: String,
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pub frontmatter: serde_yaml::Value,
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}
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#[derive(Debug)]
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pub struct Index {
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pub documents: Vec<Document>,
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}
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type Table = Vec<Vec<String>>;
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impl Index {
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/// Create a markdown document index over `dir`
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pub fn new(dir: &str, inline_tags: bool) -> Self {
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let mut i = Self { documents: vec![] };
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for e in walkdir::WalkDir::new(dir)
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.into_iter()
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.filter_map(std::result::Result::ok)
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{
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if e.path().is_dir() {
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continue;
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}
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if e.path().extension().is_none() {
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continue;
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}
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if e.path().extension().unwrap().to_str().unwrap() == "md" {
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let path = e.path().to_str().unwrap().to_owned();
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let content = std::fs::read_to_string(&path).unwrap();
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let frontmatter = get_frontmatter(&content).unwrap_or_else(|| "{}".to_owned());
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let mut frontmatter: serde_yaml::Value =
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serde_yaml::from_str(&frontmatter).unwrap();
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if inline_tags {
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let mut tags = frontmatter
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.as_mapping()
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.unwrap()
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.get("tags")
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.map(|x| x.as_sequence().unwrap_or(&Vec::new()).clone())
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.unwrap_or_default();
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let inline_tags = get_inline_tags(&content);
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tags.extend(inline_tags.iter().map(|x| x.clone().into()));
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let mut unique_tags = HashSet::new();
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for tag in tags {
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unique_tags.insert(tag);
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}
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frontmatter
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.as_mapping_mut()
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.unwrap()
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.insert("tags".into(), unique_tags.into_iter().collect());
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}
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log::trace!("Adding {path} to Index");
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let doc = Document { path, frontmatter };
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i.documents.push(doc);
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}
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}
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i
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}
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/// Build a table with specified columns from index within specified scope
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#[must_use]
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pub fn apply(&self, limit: usize, offset: usize, sort: Option<String>, reverse: bool) -> Self {
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let mut scope = self.documents.clone();
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if let Some(sort) = sort {
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scope.sort_by(|a, b| {
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let a_str: serde_json::Value = a.get_key(&sort);
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let b_str: serde_json::Value = b.get_key(&sort);
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jsonfilter::order(&a_str, &b_str)
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});
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}
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if reverse {
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scope.reverse();
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}
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let scope = scope.into_iter().skip(offset);
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if limit == 0 {
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Self {
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documents: scope.collect(),
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}
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} else {
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Self {
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documents: scope.take(limit).collect(),
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}
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}
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}
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#[must_use]
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pub fn group_by(&self, key: &str) -> HashMap<String, Self> {
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let mut grouped_items: HashMap<String, Vec<Document>> = HashMap::new();
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for doc in self.documents.clone() {
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grouped_items
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.entry(stringify(&doc.get_key(key).to_yaml()))
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.or_default()
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.push(doc);
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}
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grouped_items
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.into_iter()
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.map(|(key, item)| (key, Index { documents: item }))
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.collect()
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}
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#[must_use]
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pub fn create_table_data(&self, col: &[String]) -> Table {
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let mut rows = vec![];
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for doc in &self.documents {
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let mut rcol = vec![];
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for c in col {
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rcol.push(stringify(&doc.get_key(c).to_yaml()));
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}
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rows.push(rcol);
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}
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rows
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}
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/// Apply filters to the documents of the index returning a new filtered index
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#[must_use]
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pub fn filter_documents(&self, filters: &serde_json::Value) -> Self {
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let docs: Vec<_> = self
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.documents
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.iter()
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.filter(|x| {
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let res = jsonfilter::try_matches(filters, &x.get_full_frontmatter());
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match res {
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Ok(valid) => Ok(valid),
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Err(e) => match e {
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jsonfilter::FilterError::InvalidFilter
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| jsonfilter::FilterError::UnknownOperator => Err(e),
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jsonfilter::FilterError::KeyNotFound => Ok(false),
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},
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}
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.unwrap()
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})
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.cloned()
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.collect();
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Self { documents: docs }
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}
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}
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impl Document {
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/// Get a key from document.
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/// This will return internal properties first, then it will search the document frontmatter for the key and return it. If nothing was found an empty string is returned.
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fn get_key(&self, key: &str) -> serde_json::Value {
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match key {
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"file.title" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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path.file_stem().unwrap().to_str().unwrap().to_string(),
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);
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}
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"file.name" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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path.file_name().unwrap().to_str().unwrap().to_string(),
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);
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}
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"file.parent" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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path.parent()
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.unwrap()
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.file_name()
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.unwrap()
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.to_str()
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.unwrap()
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.to_string(),
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);
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}
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"file.folder" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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path.parent().unwrap().to_str().unwrap().to_string(),
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);
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}
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"file.ext" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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path.extension().unwrap().to_str().unwrap().to_string(),
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);
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}
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"file.size" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(path.metadata().unwrap().len().to_string());
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}
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"file.ctime" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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system_time_to_date_time(path.metadata().unwrap().created().unwrap())
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.to_rfc3339(),
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);
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}
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"file.cday" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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system_time_to_date_time(path.metadata().unwrap().created().unwrap())
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.format("%Y-%m-%d")
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.to_string(),
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);
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}
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"file.mtime" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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system_time_to_date_time(path.metadata().unwrap().modified().unwrap())
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.to_rfc3339(),
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);
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}
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"file.mday" => {
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let path = std::path::Path::new(&self.path);
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return serde_json::Value::String(
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system_time_to_date_time(path.metadata().unwrap().modified().unwrap())
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.format("%Y-%m-%d")
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.to_string(),
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);
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}
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"file.path" => {
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return serde_json::Value::String(self.path.clone());
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}
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_ => {}
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}
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let split_path: Vec<_> = key.split('.').collect();
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if split_path.len() > 1 {
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let data = self
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.frontmatter
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.as_mapping()
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.unwrap()
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.get(split_path.first().unwrap());
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if data.is_none() {
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return serde_json::Value::Null;
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}
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let mut data = data.unwrap();
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for path in &split_path[1..] {
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let data_opt = data.as_mapping().unwrap().get(path);
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if data_opt.is_none() {
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return serde_json::Value::Null;
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}
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data = data_opt.unwrap();
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}
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data.to_json()
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} else {
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self.frontmatter
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.as_mapping()
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.unwrap()
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.get(key)
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.map_or_else(|| serde_json::Value::Null, ToJson::to_json)
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}
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}
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#[must_use]
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pub fn get_full_frontmatter(&self) -> serde_json::Value {
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let mut frontmatter = self.frontmatter.to_json();
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let frontmatter_obj = frontmatter.as_object_mut().unwrap();
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frontmatter_obj.insert("file.title".into(), self.get_key("file.title"));
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frontmatter_obj.insert("file.name".into(), self.get_key("file.name"));
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frontmatter_obj.insert("file.parent".into(), self.get_key("file.parent"));
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frontmatter_obj.insert("file.folder".into(), self.get_key("file.folder"));
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frontmatter_obj.insert("file.ext".into(), self.get_key("file.ext"));
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frontmatter_obj.insert("file.size".into(), self.get_key("file.size"));
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frontmatter_obj.insert("file.ctime".into(), self.get_key("file.ctime"));
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frontmatter_obj.insert("file.cday".into(), self.get_key("file.cday"));
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frontmatter_obj.insert("file.mtime".into(), self.get_key("file.mtime"));
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frontmatter_obj.insert("file.mday".into(), self.get_key("file.mday"));
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frontmatter_obj.insert("file.path".into(), self.get_key("file.path"));
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frontmatter
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}
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}
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fn stringify(val: &serde_yaml::Value) -> String {
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match val {
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serde_yaml::Value::Null => String::new(),
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serde_yaml::Value::Bool(b) => b.to_string(),
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serde_yaml::Value::Number(n) => n.to_string(),
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serde_yaml::Value::String(s) => s.to_owned(),
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serde_yaml::Value::Sequence(_) | serde_yaml::Value::Mapping(_) => {
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serde_json::to_string(&val).unwrap()
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}
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serde_yaml::Value::Tagged(_) => unimplemented!(),
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}
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}
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