added files

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "query-docker-tags"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = { version = "1.0.127", features = ["derive"] }
+serde_json = "1.0.66"
+reqwest = { version = "0.11.4", features = ["blocking", "json"] }
+chrono = "0.4.19"
+# crossterm = "0.17"
+# tui = { version = "0.12", default-features = false, features = ['crossterm'] }

install-dev-dependencies.sh

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+#!/bin/bash
+
+sudo apt install libssl-dev
+

src/main.rs

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+use chrono::DateTime;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+struct Image {
+    architecture: String,
+    os: String,
+    size: i32,
+    last_pulled: String,
+    last_pushed: String,
+}
+
+#[derive(Deserialize)]
+struct Result {
+    images: Vec<Image>,
+    last_updater_username: String,
+    #[serde(rename(deserialize = "name"))]
+    tag_name: String,
+    last_updated: String,
+}
+
+#[derive(Deserialize)]
+struct Tags {
+    count: i32,
+    next_page: Option<String>,
+    prev_page: Option<String>,
+    results: Vec<Result>,
+}
+
+fn main() {
+    //docker hub exposes tags stored in json at the following url
+    //https://hub.docker.com/v2/repositories/rocketchat/rocket.chat/tags
+
+    //TODO fill them dynamic instead of hardcoded
+    let group = "rocketchat";
+    let repo = "rocket.chat";
+    let request = format!(
+        "https://hub.docker.com/v2/repositories/{}/{}/tags",
+        group, repo
+    );
+
+    //get response
+    let res = reqwest::blocking::get(request).unwrap();
+
+    //convert it to json
+    let raw = res.text().unwrap();
+    let tags: Tags = serde_json::from_str(&raw).unwrap();
+
+    let now = chrono::Utc::now();
+    for result in tags.results {
+        let rfc3339 = DateTime::parse_from_rfc3339(&result.last_updated).unwrap();
+        let dif = now - rfc3339.with_timezone(&chrono::Utc);
+        println!("{} vor {}", result.tag_name, format_time_nice(dif));
+    }
+}
+
+fn format_time_nice(time: chrono::Duration) -> String {
+    if time.num_weeks() == 52 {
+        format!("{} Jahr", (time.num_weeks() / 52) as i32)
+    } else if time.num_weeks() > 103 {
+        format!("{} Jahren", (time.num_weeks() / 52) as i32)
+    } else if time.num_days() == 1 {
+        format!("{} Tag", time.num_days())
+    } else if time.num_days() > 1 {
+        format!("{} Tagen", time.num_days())
+    } else if time.num_hours() == 1 {
+        format!("{} Stunde", time.num_hours())
+    } else if time.num_hours() > 1 {
+        format!("{} Stunden", time.num_hours())
+    } else if time.num_minutes() == 1 {
+        format!("{} Minute", time.num_minutes())
+    } else if time.num_minutes() > 1 {
+        format!("{} Minuten", time.num_minutes())
+    } else {
+        format!("{} Sekunden", time.num_seconds())
+    }
+}