From d5f6a615ba6d2d885b1ec21c9722c3c2a75f2e7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Ml=C3=A1dek?= <t@mldk.cz>
Date: Wed, 4 Jan 2023 21:17:48 +0100
Subject: [PATCH] feat(cli): initial upend cli

---
 tools/upend_cli/.gitignore    |    1 +
 tools/upend_cli/Cargo.lock    | 1479 +++++++++++++++++++++++++++++++++
 tools/upend_cli/Cargo.toml    |   28 +
 tools/upend_cli/src/common.rs |  114 +++
 tools/upend_cli/src/main.rs   |  136 +++
 5 files changed, 1758 insertions(+)
 create mode 100644 tools/upend_cli/.gitignore
 create mode 100644 tools/upend_cli/Cargo.lock
 create mode 100644 tools/upend_cli/Cargo.toml
 create mode 100644 tools/upend_cli/src/common.rs
 create mode 100644 tools/upend_cli/src/main.rs

diff --git a/tools/upend_cli/.gitignore b/tools/upend_cli/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/tools/upend_cli/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/tools/upend_cli/Cargo.lock b/tools/upend_cli/Cargo.lock
new file mode 100644
index 0000000..20bb046
--- /dev/null
+++ b/tools/upend_cli/Cargo.lock
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diff --git a/tools/upend_cli/Cargo.toml b/tools/upend_cli/Cargo.toml
new file mode 100644
index 0000000..6af5a17
--- /dev/null
+++ b/tools/upend_cli/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "upend_cli"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.0.32", features = ["derive", "color"] }
+reqwest = { version = "0.11.13", features = ["blocking", "json"] }
+
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+
+multibase = "0.9"
+multihash = { version = "*", default-features = false, features = [
+    "alloc",
+    "multihash-impl",
+    "sha2",
+    "identity",
+] }
+uuid = { version = "0.8", features = ["v4"] }
+
+filebuffer = "0.4.0"
+
+log = "0.4"
+anyhow = "1.0.68"
+env_logger = "0.10.0"
diff --git a/tools/upend_cli/src/common.rs b/tools/upend_cli/src/common.rs
new file mode 100644
index 0000000..30e95df
--- /dev/null
+++ b/tools/upend_cli/src/common.rs
@@ -0,0 +1,114 @@
+use anyhow::{anyhow, Result};
+use multihash::{Code, Hasher, Multihash, MultihashDigest};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Entry {
+    pub entity: String,
+    pub attribute: String,
+    pub value: EntryValue,
+}
+
+#[derive(Debug, Clone)]
+pub struct ImmutableEntry(pub Entry);
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct InvariantEntry {
+    pub attribute: String,
+    pub value: EntryValue,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(tag = "t", content = "c")]
+pub enum EntryValue {
+    String(String),
+    Number(f64),
+    Address(String),
+    Null,
+    Invalid,
+}
+
+impl std::str::FromStr for EntryValue {
+    type Err = std::convert::Infallible;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.len() < 2 {
+            match s.chars().next() {
+                Some('S') => Ok(EntryValue::String("".into())),
+                Some('X') => Ok(EntryValue::Null),
+                _ => Ok(EntryValue::Invalid),
+            }
+        } else {
+            let (type_char, content) = s.split_at(1);
+            match (type_char, content) {
+                ("S", content) => Ok(EntryValue::String(String::from(content))),
+                ("N", content) => {
+                    if let Ok(n) = content.parse::<f64>() {
+                        Ok(EntryValue::Number(n))
+                    } else {
+                        Ok(EntryValue::Invalid)
+                    }
+                }
+                ("O", content) => {
+                    Ok(EntryValue::Address(String::from(content)))
+                }
+                _ => Ok(EntryValue::Invalid),
+            }
+        }
+    }
+}
+
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub struct Hash(pub Vec<u8>);
+
+impl AsRef<[u8]> for Hash {
+    fn as_ref(&self) -> &[u8] {
+        self.0.as_ref()
+    }
+}
+
+pub fn hash<T: AsRef<[u8]>>(input: T) -> Hash {
+    let mut hasher = multihash::Sha2_256::default();
+    hasher.update(input.as_ref());
+    Hash(Vec::from(hasher.finalize()))
+}
+
+fn b58_encode<T: AsRef<[u8]>>(vec: T) -> String {
+    multibase::encode(multibase::Base::Base58Btc, vec.as_ref())
+}
+
+#[derive(Clone, Eq, PartialEq, Hash)]
+pub enum Address {
+    Hash(Hash),
+    Attribute(String),
+    Url(String),
+}
+
+// multihash SHA2-256
+const SHA2_256: u64 = 0x12;
+// multihash identity
+const IDENTITY: u64 = 0x00;
+
+impl Address {
+    pub fn encode(&self) -> Result<Vec<u8>> {
+        let hash = match self {
+            Self::Hash(hash) => Multihash::wrap(SHA2_256, &hash.0).map_err(|err| anyhow!(err))?,
+            Self::Attribute(attribute) => {
+                Code::Identity.digest(&[&[b'A'], attribute.as_bytes()].concat())
+            }
+            Self::Url(url) => Code::Identity.digest(&[&[b'X'], url.as_bytes()].concat()),
+        };
+
+        Ok(hash.to_bytes())
+    }
+}
+
+impl std::fmt::Display for Address {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            b58_encode(self.encode().map_err(|_| std::fmt::Error)?)
+        )
+    }
+}
diff --git a/tools/upend_cli/src/main.rs b/tools/upend_cli/src/main.rs
new file mode 100644
index 0000000..854f247
--- /dev/null
+++ b/tools/upend_cli/src/main.rs
@@ -0,0 +1,136 @@
+use anyhow::anyhow;
+use clap::{Parser, Subcommand, ValueEnum};
+use filebuffer::FileBuffer;
+use log::{debug, error, trace};
+use reqwest::Url;
+use serde_json::json;
+use std::path::PathBuf;
+
+use crate::common::EntryValue;
+
+mod common;
+
+/// Command-line client for UpEnd
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None, arg_required_else_help=true)]
+struct Args {
+    #[command(subcommand)]
+    command: Option<Commands>,
+
+    /// Output format
+    #[arg(short, long)]
+    format: Option<OutputFormat>,
+}
+
+#[derive(Subcommand, Debug)]
+enum Commands {
+    Query {
+        /// URL of the UpEnd instance to query.
+        #[arg(short, long)]
+        url: Option<Url>,
+        /// The query itself, in L-expression format.
+        query: String,
+    },
+    /// Insert an entry.
+    Insert {
+        /// URL of the UpEnd instance to query.
+        #[arg(short, long)]
+        url: Option<Url>,
+        /// The address of the entity.
+        entity: String,
+        // The attribute.
+        attribute: String,
+        // The value.
+        value: common::EntryValue,
+    },
+    /// Get the address of a file, attribute or URL.
+    Address {
+        /// Path to a file.
+        filepath: PathBuf,
+    },
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug, ValueEnum)]
+enum OutputFormat {
+    Json,
+    Tsv,
+    Raw,
+}
+
+fn main() -> anyhow::Result<()> {
+    env_logger::init();
+    let args = Args::parse();
+
+    let format = args.format.unwrap_or(OutputFormat::Tsv);
+
+    match args.command {
+        Some(Commands::Query { url, query }) => {
+            let url = url.unwrap_or("http://localhost:8093".parse().unwrap());
+            let api_url = url.join("/api/query")?;
+
+            debug!("Querying \"{}\"", api_url);
+            let client = reqwest::blocking::Client::new();
+            let response = client.post(api_url).body(query).send()?;
+
+            match response.error_for_status_ref() {
+                Ok(_) => match format {
+                    OutputFormat::Json | OutputFormat::Raw => println!("{}", response.text()?),
+                    OutputFormat::Tsv => todo!(),
+                },
+                Err(err) => {
+                    error!("{}", response.text()?);
+                    return Err(err.into());
+                }
+            }
+        }
+        Some(Commands::Insert {
+            url,
+            entity,
+            attribute,
+            value,
+        }) => {
+            let url = url.unwrap_or("http://localhost:8093".parse().unwrap());
+            let api_url = url.join("/api/obj")?;
+
+            if let EntryValue::Invalid = value {
+                return Err(anyhow!("Invalid entry value."));
+            }
+
+            let body = json!({
+               "entity": entity,
+               "attribute": attribute,
+               "value": value
+            });
+
+            debug!("Inserting {:?} at \"{}\"", body, api_url);
+            let client = reqwest::blocking::Client::new();
+            let response = client.put(api_url).json(&body).send()?;
+
+            match response.error_for_status_ref() {
+                Ok(_) => {
+                    let data: Vec<String> = response.json()?;
+                    println!("{}", data[0]);
+                }
+                Err(err) => {
+                    error!("{}", response.text()?);
+                    return Err(err.into());
+                }
+            }
+        }
+        Some(Commands::Address { filepath }) => {
+            debug!("Hashing {:?}...", filepath);
+            let fbuffer = FileBuffer::open(&filepath)?;
+            let digest = common::hash(&fbuffer);
+            trace!("Finished hashing {:?}...", &filepath);
+            let address = common::Address::Hash(digest);
+
+            match format {
+                OutputFormat::Json => todo!(),
+                OutputFormat::Tsv | OutputFormat::Raw => println!("{}", address),
+            }
+        }
+        None => {}
+    }
+
+    Ok(())
+}