diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..a518c37 --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,15 @@ +version: 2 +updates: + # Maintain dependencies for GitHub Actions + # src: https://github.com/marketplace/actions/build-and-push-docker-images#keep-up-to-date-with-github-dependabot + - package-ecosystem: "github-actions" + directory: "/" + schedule: + interval: "daily" + + # Maintain dependencies for Rust/Cargo + - package-ecosystem: "cargo" + directory: "/" + schedule: + interval: "quarterly" + open-pull-requests-limit: 10 diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..a7a4470 --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,41 @@ +name: CI + +on: + push: + branches: [main] + pull_request: + branches: [main] + +jobs: + build: + name: Build + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@stable + - uses: Swatinem/rust-cache@v2 + - name: Build + run: cargo build --verbose + + fmt: + name: Format + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@stable + with: + components: rustfmt + - name: Check formatting + run: cargo fmt --all -- --check + + lint: + name: Clippy + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - uses: dtolnay/rust-toolchain@stable + with: + components: clippy + - uses: Swatinem/rust-cache@v2 + - name: Run clippy + run: cargo clippy -- -D warnings diff --git a/.gitignore b/.gitignore index 15dbcfd..30cfb16 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,5 @@ *.json *.json.gz + +# Rust / cargo +/target diff --git a/AGENTS.md b/AGENTS.md new file mode 100644 index 0000000..e09d346 --- /dev/null +++ b/AGENTS.md @@ -0,0 +1,43 @@ +# EVMap OSM Loader + +This program downloads all charging stations from OpenStreetMap via Overpass +API, preprocesses and aggregates them and exports them as compressed JSON file. + +Please see the `README.md` file for more information. + +## Build & Commands + +- Run typechecking: `cargo check` +- Build binary: `cargo build` +- Run tests: `cargo test` +- Format code: `cargo fmt` +- Run linting: `cargo clippy` + +## Code Style + +- Follow Rust coding conventions +- Apply Rust code style using `cargo fmt` +- Use crate import groups separated by an empty line: std, 3rd party, 1st party +- Use merged imports: One `use` per crate +- Avoid deeply nested logic by using early returns for error cases +- Write clean, high-quality code with concise comments and clear variable names + +## Security + +- Never commit secrets or API keys to repository + +## Decisions + +Whenever there is a situation where you need to choose between two or more +approaches, don't just pick one. Instead, ask. + +This includes: + +- Choosing between two possible architectural approaches +- Choosing between two libraries to use +...and similar situations. + +## Conversational Style + +Don't summarize changes at the end of a prompt that you make as a direct result +to instructions. diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..b949656 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,2021 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "addr2line" +version = "0.24.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1" +dependencies = [ + "gimli", +] + +[[package]] +name = "adler2" +version = "2.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa" + +[[package]] +name = "aho-corasick" +version 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--- /dev/null +++ b/Cargo.toml @@ -0,0 +1,17 @@ +[package] +name = "evmap-osm-loader" +version = "0.1.0" +edition = "2024" + +[dependencies] +anyhow = "1" +bytes = "1" +clap = { version = "4", features = ["derive"] } +flate2 = "1" +reqwest = { version = "0.12", features = ["json"] } +serde = { version = "1", features = ["derive"] } +serde_json = "1" +tokio = { version = "1", features = ["full"] } + +[dev-dependencies] +rstest = "0.18" diff --git a/README.md b/README.md index 7673183..7abcff7 100644 --- a/README.md +++ b/README.md @@ -1,15 +1,9 @@ -# EVMap OSM Data Updater (PoC) +# EVMap OSM Loader -This is a proof-of-concept for a charging station data fetcher for -OpenStreetMap. The script fetches all charging stations worldwide through the -Overpass API, preprocesses the data and writes it to a gzip-compressed JSON -file. - -## Requirements - -- [curl](https://curl.se/) -- [jq](https://stedolan.github.io/jq/) -- [gzip](https://www.gnu.org/software/gzip/) +A Rust implementation of the Overpass API data loader for charging stations. +This tool downloads worldwide charging station data from OpenStreetMap via the +Overpass API, preprocesses it, and saves the result as a compressed JSON file +(for consumption by EVMap). ## Data Format @@ -17,7 +11,8 @@ The resulting gzipped JSON file contains data in the following format: ```json5 { - "timestamp": 1633282807.294814, // UNIX timestamp in seconds + "timestamp": 1633282807, // UNIX timestamp in seconds + "count": 4376, // Number of elements below "elements": [ { // Unique numeric ID @@ -25,6 +20,8 @@ The resulting gzipped JSON file contains data in the following format: // Latitude, longitude (WGS84 coordinates, I assume) "lat": 47.0701573, "lon": 7.5664432, + // Type of element (node, way, relation) + "type": "node", // Timestamp of last update "timestamp": "2021-09-10T11:47:56Z", // Numeric, monotonically increasing version number @@ -34,29 +31,105 @@ The resulting gzipped JSON file contains data in the following format: // Raw key-value OSM tags "tags": { "amenity": "charging_station", - ... + ... // More OSM tags } }, - ... + ... // More elements ] } ``` For the tagging schema, see +## Building + +Make sure you have Rust and Cargo installed. + +Build the project: + + cargo build --release + +The binary will be available at `target/release/evmap-osm-loader`. + ## Usage -Simply invoke the script: +### Basic Usage + +Download charging station data with default settings: - ./load-overpass.sh + evmap-osm-loader -Note: The API query may take multiple minutes. The default timeout is set to 15 -minutes, but depending on the load on the API endpoint, this may not be +**Note:** The API query may take multiple minutes. The default timeout is set +to 15 minutes, but depending on the load on the API endpoint, this may not be sufficient. -The script can be adjusted by editing the configuration variables. Possible -configuration variables include the Overpass API endpoint or the download -timeout. +Show usage: + + evmap-osm-loader --help + +### Command-Line Options + +``` +evmap-osm-loader [OPTIONS] + +Options: + --keep-intermediate + Keep intermediate raw response file + [default: false] + + --overpass-api-endpoint + Overpass API to use ('switzerland', 'world', or a custom URL) + + The following hardcoded endpoints are supported: + - switzerland (https://overpass.osm.ch/api/interpreter) + - world (https://overpass-api.de/api/interpreter) + + --timeout-seconds + Timeout in seconds for the Overpass query + [default: 900] + + --outfile-raw + Output file for raw response (only written if --keep-intermediate=true) + [default: overpass-result.json] + + --outfile-compressed + Output file for compressed result + [default: charging-stations-osm.json.gz] + + -h, --help + Print help + + -V, --version + Print version +``` + +## Query Details + +The tool executes the following Overpass QL query: + +``` +[out:json][timeout:900]; +( + node[amenity=charging_station]; + area[amenity=charging_station]; + relation[amenity=charging_station]; +); +out meta qt; +``` + +This query retrieves: + +- All nodes tagged as charging stations +- All areas (ways) tagged as charging stations +- All relations tagged as charging stations + +## Future Enhancements + +The async architecture allows for future parallelization opportunities, such as: + +- Parallel processing of large datasets +- Concurrent API requests for different regions +- Streamed parsing and processing of HTTP response ## License diff --git a/src/cli.rs b/src/cli.rs new file mode 100644 index 0000000..3f5400b --- /dev/null +++ b/src/cli.rs @@ -0,0 +1,77 @@ +use clap::Parser; + +#[derive(Debug, Clone)] +pub enum OverpassApiEndpoint { + /// Use the API from overpass.osm.ch (which only includes Switzerland, good for quick testing) + Switzerland, + /// Use the API from overpass-api.de (which includes the whole world) + World, + /// Use a custom Overpass API URL + Custom(String), +} + +impl OverpassApiEndpoint { + /// Parse a string into an OverpassApiScope + fn parse(s: &str) -> Result { + match s { + "switzerland" => Ok(OverpassApiEndpoint::Switzerland), + "world" => Ok(OverpassApiEndpoint::World), + url if url.starts_with("http://") || url.starts_with("https://") => { + Ok(OverpassApiEndpoint::Custom(url.to_string())) + } + _ => Err(format!( + "Invalid value '{}'. Expected 'switzerland', 'world', or a URL starting with http:// or https://", + s + )), + } + } +} + +impl OverpassApiEndpoint { + /// Get the Overpass API URL for this scope + pub fn get_url(&self) -> &str { + match self { + OverpassApiEndpoint::Switzerland => "https://overpass.osm.ch/api/interpreter", + OverpassApiEndpoint::World => "https://overpass-api.de/api/interpreter", + OverpassApiEndpoint::Custom(url) => url, + } + } +} + +/// Download worldwide charging station data from Overpass API and write them to +/// a compressed JSON file. +#[derive(Parser, Debug)] +#[command(author, version, about, long_about = None)] +pub struct Args { + /// Keep intermediate raw response file + #[arg(long, value_name = "BOOL", default_value = "false")] + pub keep_intermediate: bool, + + /// Overpass API to use ('switzerland', 'world', or a custom URL) + /// + /// The following hardcoded endpoints are supported: + /// + /// switzerland (https://overpass.osm.ch/api/interpreter), + /// world (https://overpass-api.de/api/interpreter) + #[arg(long, value_parser = OverpassApiEndpoint::parse)] + pub overpass_api_endpoint: OverpassApiEndpoint, + + /// Timeout in seconds for the Overpass query + #[arg(long, default_value = "900")] + pub timeout_seconds: u32, + + /// Output file for raw response (only written if --keep-intermediate=true) + #[arg(long, default_value = "overpass-result.json")] + pub outfile_raw: String, + + /// Output file for compressed result + #[arg(long, default_value = "charging-stations-osm.json.gz")] + pub outfile_compressed: String, +} + +impl Args { + /// Get the appropriate Overpass API URL based on the scope + pub fn get_overpass_url(&self) -> &str { + self.overpass_api_endpoint.get_url() + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..339c055 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,107 @@ +use std::{fs::File, io::Write, path::Path}; + +use anyhow::{Context, Result}; +use clap::Parser; +use flate2::{Compression, write::GzEncoder}; + +mod cli; +mod overpass; +mod utils; + +use cli::Args; +use overpass::{download_data, parse_response, process_elements}; +use utils::{get_file_size_human, log_debug, log_error, log_info}; + +/// Extra seconds to add to HTTP client timeout beyond the Overpass query timeout +/// This provides buffer for network latency and response processing +const HTTP_TIMEOUT_BUFFER_SECONDS: u64 = 1; + +fn serialize_json_pretty(value: &T, indent: &[u8]) -> Result> { + let formatter = serde_json::ser::PrettyFormatter::with_indent(indent); + let mut output = Vec::new(); + let mut serializer = serde_json::Serializer::with_formatter(&mut output, formatter); + value + .serialize(&mut serializer) + .context("Failed to serialize to JSON")?; + Ok(output) +} + +#[tokio::main] +async fn main() -> Result<()> { + let args = Args::parse(); + + // Build HTTP client + let client = reqwest::Client::builder() + .timeout(std::time::Duration::from_secs( + args.timeout_seconds as u64 + HTTP_TIMEOUT_BUFFER_SECONDS, + )) + .build() + .context("Failed to build HTTP client")?; + + // Step 1: Download data + let overpass_api_endpoint = args.get_overpass_url(); + log_info(&format!( + "1: Downloading data through Overpass API (this may take up to {} seconds...)", + args.timeout_seconds + )); + log_debug(&format!( + "-> Using overpass API endpoint: {}", + overpass_api_endpoint + )); + + let response_bytes = + download_data(&client, overpass_api_endpoint, args.timeout_seconds).await?; + + // Parse the JSON response + let overpass_response = parse_response(&response_bytes)?; + + let element_count = overpass_response.elements.len(); + if element_count == 0 { + log_error("Query failed, found 0 elements."); + // Try to parse for error details + if let Ok(json_value) = serde_json::from_slice::(&response_bytes) + && let Some(remark) = json_value.get("remark").and_then(|v| v.as_str()) + { + log_error(&format!("Details: {}", remark)); + } + anyhow::bail!("No elements found in response"); + } + + // Save intermediate file if requested + if args.keep_intermediate { + std::fs::write(&args.outfile_raw, &response_bytes) + .context("Failed to write intermediate file")?; + let size_raw = get_file_size_human(Path::new(&args.outfile_raw)); + log_info(&format!( + "Saved intermediate file: {} ({})", + args.outfile_raw, size_raw + )); + } + + // Step 2: Process the data + log_info(&format!("2: Processing {} entries", element_count)); + + let processed = process_elements(overpass_response.elements)?; + + // Serialize to JSON with pretty formatting (1-space indentation) + let json_output = serialize_json_pretty(&processed, b" ")?; + + // Compress with gzip + let output_file = File::create(&args.outfile_compressed) + .with_context(|| format!("Failed to create output file: {}", args.outfile_compressed))?; + let mut encoder = GzEncoder::new(output_file, Compression::best()); + encoder + .write_all(&json_output) + .context("Failed to write compressed data")?; + encoder + .finish() + .context("Failed to finish gzip compression")?; + + let size_compressed = get_file_size_human(Path::new(&args.outfile_compressed)); + log_info(&format!( + "Done: {} ({})", + args.outfile_compressed, size_compressed + )); + + Ok(()) +} diff --git a/src/overpass.rs b/src/overpass.rs new file mode 100644 index 0000000..ec68519 --- /dev/null +++ b/src/overpass.rs @@ -0,0 +1,141 @@ +use std::{ + collections::HashMap, + time::{SystemTime, UNIX_EPOCH}, +}; + +use anyhow::{Context, Result}; +use bytes::Bytes; +use serde::{Deserialize, Serialize}; + +/// Overpass API response structure +#[derive(Debug, Deserialize)] +pub struct OverpassResponse { + #[allow(dead_code)] + version: f64, + #[allow(dead_code)] + generator: String, + pub elements: Vec, +} + +/// Element in the Overpass response +#[derive(Debug, Deserialize, Serialize)] +pub struct Element { + #[serde(rename = "type")] + pub element_type: String, + pub id: u64, + #[serde(default)] + pub lat: Option, + #[serde(default)] + pub lon: Option, + pub timestamp: String, + pub version: u32, + #[serde(default)] + pub changeset: Option, + #[serde(default)] + pub user: Option, + #[serde(default)] + pub uid: Option, + pub tags: HashMap, +} + +/// Processed output structure +#[derive(Debug, Serialize)] +pub struct ProcessedOutput { + pub timestamp: u64, + pub count: usize, + pub elements: Vec, +} + +/// Processed element with only required fields +#[derive(Debug, Serialize)] +pub struct ProcessedElement { + pub id: u64, + #[serde(skip_serializing_if = "Option::is_none")] + pub lat: Option, + #[serde(skip_serializing_if = "Option::is_none")] + pub lon: Option, + pub timestamp: String, + #[serde(rename = "type")] + pub element_type: String, + pub version: u32, + #[serde(skip_serializing_if = "Option::is_none")] + pub user: Option, + pub tags: HashMap, +} + +impl From for ProcessedElement { + fn from(elem: Element) -> Self { + ProcessedElement { + id: elem.id, + lat: elem.lat, + lon: elem.lon, + timestamp: elem.timestamp, + element_type: elem.element_type, + version: elem.version, + user: elem.user, + tags: elem.tags, + } + } +} + +/// Build the Overpass QL query for charging stations +fn build_query(timeout_seconds: u32) -> String { + format!( + " + [out:json][timeout:{}]; + ( + node[amenity=charging_station]; + area[amenity=charging_station]; + relation[amenity=charging_station]; + ); + out meta qt; + ", + timeout_seconds + ) +} + +/// Download data from Overpass API +pub async fn download_data( + client: &reqwest::Client, + url: &str, + timeout_seconds: u32, +) -> Result { + let query = build_query(timeout_seconds); + + let response = client + .post(url) + .header("content-type", "text/plain") + .body(query) + .send() + .await + .context("Failed to send request to Overpass API")?; + + if !response.status().is_success() { + anyhow::bail!("HTTP request failed with status: {}", response.status()); + } + + let bytes = response + .bytes() + .await + .context("Failed to read response body")?; + Ok(bytes) +} + +/// Parse Overpass response from bytes +pub fn parse_response(response_bytes: &[u8]) -> Result { + serde_json::from_slice(response_bytes).context("Failed to parse Overpass API response as JSON") +} + +/// Process elements into the output format +pub fn process_elements(elements: Vec) -> Result { + let timestamp = SystemTime::now() + .duration_since(UNIX_EPOCH) + .context("Failed to get system time")? + .as_secs(); + + Ok(ProcessedOutput { + timestamp, + count: elements.len(), + elements: elements.into_iter().map(ProcessedElement::from).collect(), + }) +} diff --git a/src/utils.rs b/src/utils.rs new file mode 100644 index 0000000..2ad66fe --- /dev/null +++ b/src/utils.rs @@ -0,0 +1,71 @@ +use std::path::Path; + +pub fn log_info(msg: &str) { + println!("\x1b[32m{}\x1b[0m", msg); +} + +pub fn log_debug(msg: &str) { + println!("{}", msg); +} + +pub fn log_error(msg: &str) { + eprintln!("\x1b[31m{}\x1b[0m", msg); +} + +pub fn format_bytes(size: u64) -> String { + const UNITS: &[(&str, u64)] = &[ + ("B", 1), + ("K", 1024), + ("M", 1024 * 1024), + ("G", 1024 * 1024 * 1024), + ]; + + // Find the appropriate unit + for i in (1..UNITS.len()).rev() { + if size >= UNITS[i].1 { + let size_f = size as f64; + let unit_f = UNITS[i].1 as f64; + return format!("{:.1}{}", size_f / unit_f, UNITS[i].0); + } + } + + // Fallback to bytes for small files + format!("{}{}", size, UNITS[0].0) +} + +pub fn get_file_size_human(path: &Path) -> String { + match std::fs::metadata(path) { + Ok(metadata) => format_bytes(metadata.len()), + Err(e) => { + log_error(&format!( + "Failed to get file size for '{}': {}", + path.display(), + e + )); + "unknown".to_string() + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use rstest::rstest; + + #[rstest] + #[case(0, "0B")] + #[case(1, "1B")] + #[case(512, "512B")] + #[case(1023, "1023B")] + #[case(1024, "1.0K")] + #[case(1536, "1.5K")] + #[case(1024 * 1024 - 1, "1024.0K")] + #[case(1024 * 1024, "1.0M")] + #[case(1024 * 1024 + 512 * 1024, "1.5M")] + #[case(1024 * 1024 * 1024, "1.0G")] + #[case(1024 * 1024 * 1024 * 2 + 512 * 1024 * 1024, "2.5G")] + #[case(1024 * 1024 * 1024 * 1024, "1024.0G")] + fn test_format_bytes(#[case] size: u64, #[case] expected: &str) { + assert_eq!(format_bytes(size), expected); + } +}