Issue #44: Implement exporting table in json format

crates/gitql-ast/Cargo.toml

@@ -10,4 +10,5 @@ license = "MIT"
 [dependencies]
 lazy_static = "1.4.0"
 chrono = "0.4.31"
+serde_json = "1.0.111"
 csv = "1.3.0"

crates/gitql-ast/src/object.rs

@@ -1,8 +1,7 @@
 use std::error::Error;
 
-use csv::Writer;
-
 use crate::value::Value;
+use csv::Writer;
 
 /// In memory representation of the list of [`Value`] in one Row
 #[derive(Default)]
@@ -57,6 +56,27 @@ impl GitQLObject {
         self.groups.len()
     }
 
+    /// Export the GitQLObject as JSON String
+    pub fn as_json(&self) -> serde_json::Result<String> {
+        let mut elements: Vec<serde_json::Value> = vec![];
+
+        if let Some(group) = self.groups.get(0) {
+            let titles = &self.titles;
+            for row in &group.rows {
+                let mut object = serde_json::Map::new();
+                for (i, value) in row.values.iter().enumerate() {
+                    object.insert(
+                        titles[i].to_string(),
+                        serde_json::Value::String(value.to_string()),
+                    );
+                }
+                elements.push(serde_json::Value::Object(object));
+            }
+        }
+
+        serde_json::to_string(&serde_json::Value::Array(elements))
+    }
+
     /// Export the GitQLObject as CSV String
     pub fn as_csv(&self) -> Result<String, Box<dyn Error>> {
         let mut writer = Writer::from_writer(vec![]);

crates/gitql-cli/Cargo.toml

@@ -11,4 +11,4 @@ license = "MIT"
 gitql-ast = { path = "../gitql-ast", version = "0.10.0" }
 gitql-parser = { path = "../gitql-parser", version = "0.11.0" }
 comfy-table = "7.1.0"
-termcolor = "1.2.0"
+termcolor = "1.4.1"

crates/gitql-cli/src/arguments.rs

@@ -3,6 +3,8 @@
 pub enum OutputFormat {
     /// Render the output as table
     Render,
+    /// Print the output in json format
+    JSON,
     /// Print the output in csv format
     CSV,
 }
@@ -132,6 +134,8 @@ pub fn parse_arguments(args: &Vec<String>) -> Command {
                 let output_type = &args[arg_index].to_lowercase();
                 if output_type == "csv" {
                     arguments.output_format = OutputFormat::CSV;
+                } else if output_type == "json" {
+                    arguments.output_format = OutputFormat::JSON;
                 } else if output_type == "render" {
                     arguments.output_format = OutputFormat::Render;
                 } else {
@@ -179,7 +183,7 @@ pub fn print_help_list() {
     println!("-q,  --query <GQL Query>    GitQL query to run on selected repositories");
     println!("-p,  --pagination           Enable print result with pagination");
     println!("-ps, --pagesize             Set pagination page size [default: 10]");
-    println!("-o,  --output               Set output format [render, csv]");
+    println!("-o,  --output               Set output format [render, json, csv]");
     println!("-a,  --analysis             Print Query analysis");
     println!("-h,  --help                 Print GitQL help");
     println!("-v,  --version              Print GitQL Current Version");

src/main.rs

@@ -160,6 +160,11 @@ fn execute_gitql_query(
                     arguments.page_size,
                 );
             }
+            OutputFormat::JSON => {
+                if let Ok(json) = groups.as_json() {
+                    println!("{}", json);
+                }
+            }
             OutputFormat::CSV => {
                 if let Ok(csv) = groups.as_csv() {
                     println!("{}", csv);