From fd780b6e19436ce28a86f5141071e2f995f5942a Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 14 Aug 2021 01:55:16 +0530
Subject: * Adds Option to select States & Districts * Colored Texts

---
 find_session.v | 194 ++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 166 insertions(+), 28 deletions(-)

diff --git a/find_session.v b/find_session.v
index aebf2b4..c1250a7 100644
--- a/find_session.v
+++ b/find_session.v
@@ -2,8 +2,27 @@ import json
 import net.http
 import os
 import time
+import term
 import term.ui as tui
 
+struct StatesResponse {
+	states []State
+}
+
+struct State {
+	state_id int
+	state_name string
+}
+
+struct DistrictResponse {
+	districts []District
+}
+
+struct District {
+	district_id int
+	district_name string
+}
+
 struct App {
 mut:
     tui &tui.Context = 0
@@ -16,8 +35,10 @@ struct VaccineAvailability {
 mut:
 	date string
 	available_sessions []Sessions
-	state_id  int = 17
-	district_id int = 296
+	state_id  int
+	district_id int
+	state State
+	district District
 }
 
 struct SessionResponse {
@@ -74,7 +95,7 @@ fn frame(x voidptr) {
 }
 
 fn (mut app App) draw_header() {
-	app.tui.draw_text(3,2,"Vaccine Availability on ${app.data.date} | Total Centers : ${app.data.available_sessions.len}")
+	app.tui.draw_text(3,2, term.bold(term.bright_magenta("Vaccine Availability on ${app.data.date} | ${app.data.state.state_name},${app.data.district.district_name} | Total Centers : ${app.data.available_sessions.len}")))
 	app.tui.horizontal_separator(3)
 }
 
@@ -83,15 +104,21 @@ fn (mut app App) draw_vaccine_availability() {
 	start_x := 3
 	mut start_y := 5
 	if available_sessions.len == 0 {
-		app.tui.draw_text(app.tui.window_width/2 - 10,app.tui.window_height/2,"No Vaccine Available")
+		app.tui.draw_text(app.tui.window_width/2 - 10,app.tui.window_height/2, term.black(term.bg_white("No Vaccine Available")))
 	} else {
 		for session in available_sessions {
 			fee := match session.fee_type{
-				'Free' {'Free'}
-				'Paid' { session.fee }
+				'Free' {term.green('Free')}
+				'Paid' {term.blue(session.fee)  }
 				else { 'N/A' }
 			}
-			app.tui.draw_text(start_x,start_y,"${session.address} | Vaccine: ${session.vaccine} | Total Available: ${session.available_capacity} | Fee: ${fee}")
+			vaccine := match session.vaccine {
+				'COVISHIELD' {term.bold(term.green(session.vaccine))}
+				'COVAXIN' {term.bold(term.yellow(session.vaccine))}
+				else {session.vaccine}
+			}
+			capacity := term.green(session.available_capacity.str())
+			app.tui.draw_text(start_x,start_y,"${session.name} | Vaccine: ${vaccine} | Total Available: ${capacity} | Fee: ${fee}")
 			start_y += 2
 		}
 	}
@@ -102,29 +129,57 @@ fn init(x voidptr) {
 	app.find_session(app.data.district_id, app.data.date)
 }
 
-
 fn main() {
-	mut app := &App{}
-	app.tui = tui.init(
-		user_data: app
-		event_fn: event
-		frame_fn: frame
-		hide_cursor: false,
-		init_fn: init
-	)
-	mut date_of_vaccine := time.now().add_days(app.idx).get_fmt_date_str(.hyphen,.ddmmyyyy)
-	if os.args.len ==2 {
-		date_of_vaccine = os.args[1]
-	} 
+	setup_states()
+}
 
-	println("Searching Vaccine Availability on $date_of_vaccine")
-	app.data.date = date_of_vaccine
-	app.tui.set_window_title("COWIN Vaccine Finder")
-	app.tui.run() ?
+fn get_states() ?[]State {
+	fetch_config := http.FetchConfig{
+		header: http.new_header(
+				key : .accept_language,
+				value: 'en-US'
+		)
+	}
+
+	url := 'https://cdn-api.co-vin.in/api/v2/admin/location/states'
+	resp := http.fetch(url, fetch_config) or {
+		term.clear()
+		println(term.fail_message('Failed to fetch States from the server'))
+		return error('Failed to fetch States from the server')
+	}
+
+	states_data := json.decode(StatesResponse, resp.text) or {
+		term.clear()
+		println(term.fail_message('Failed to decode data from server'))
+		return error('Failed to decode data from server')
+	}		
+	return states_data.states
+}
+
+fn get_districts(state_id int) ?[]District {
+	fetch_config := http.FetchConfig{
+		header: http.new_header(
+				key : .accept_language,
+				value: 'en-US'
+		)
+	}
+
+	url := 'https://cdn-api.co-vin.in/api/v2/admin/location/districts/$state_id'
+	resp := http.fetch(url, fetch_config) or {
+		term.clear()
+		println(term.fail_message('Failed to fetch Districts from the server'))
+		return error('Failed to fetch Districts from the server')
+	}
+
+	district_data := json.decode(DistrictResponse, resp.text) or {
+		term.clear()
+		println(term.fail_message('Failed to decode data from server'))
+		return error('Failed to Decode data from the server')
+	}		
+	return district_data.districts
 }
 
 fn (mut app App) find_session(district_id int,date string) {
-	app.is_loading = true
 	fetch_config := http.FetchConfig{
 		header: http.new_header(
 				key : .accept_language,
@@ -140,14 +195,97 @@ fn (mut app App) find_session(district_id int,date string) {
 	}
 
 	session_data := json.decode(SessionResponse, resp.text) or {
-		println('failed to decode session json')
+		println(term.fail_message('Failed to decode data'))
 		return
 	}
 
 	app.data.available_sessions = session_data.sessions.filter( it.available_capacity > 0 && it.min_age_limit<45)
-	app.is_loading = false
 }
 
-fn setup_termui() {
+fn setup_termui(state State, district District) {
+	mut app := &App{}
+	app.tui = tui.init(
+		user_data: app
+		event_fn: event
+		frame_fn: frame
+		hide_cursor: false,
+		init_fn: init
+	)
+	mut date_of_vaccine := time.now().add_days(app.idx).get_fmt_date_str(.hyphen,.ddmmyyyy)
+	if os.args.len ==2 {
+		date_of_vaccine = os.args[1]
+	}
+	println("Searching Vaccine Availability on $date_of_vaccine")
+	app.data.date = date_of_vaccine
+	app.data.state = state
+	app.data.district = district
+	app.data.state_id = state.state_id
+	app.data.district_id = district.district_id
+	app.tui.set_window_title("COWIN Vaccine Finder")
+	app.tui.run() or {}
+}
+
+fn setup_states() {
+	term.clear()
+    width, height := term.get_terminal_size()
+	println(term.header('Available State', '='))
+	start_x :=  width/2 - 10
+	mut start_y := 5
+	mut selected_state := 0
+    term.set_cursor_position(x: start_x, y: start_y)
+
+	states := get_states() or {
+		return
+	}
+
+	for i in 0 .. states.len {
+		println(term.bright_green('$i . ${states[i].state_name}'))
+		start_y += 1
+		term.set_cursor_position(x: start_x, y: start_y)
+	}
+	term.set_cursor_position(x: 0, y: height)
+	
+	for {
+        if var := os.input_opt('Please select a State: ') {
+            if var.int() < 0 || var.int() >= states.len {
+                continue
+            }
+			setup_districts(states[var.int()])
+            break
+        }
+        println('')
+        break
+    }
+	
+}
+
+fn setup_districts(state State) {
+	term.clear()
+    width, height := term.get_terminal_size()
+	println(term.header('Available States', '='))
+	start_x :=  width/2 - 10
+	mut start_y := 5
+    term.set_cursor_position(x: start_x, y: start_y)
+	districts := get_districts(state.state_id) or {
+		return
+	}
+
+	for i in 0 .. districts.len {
+		println(term.bright_green('$i . ${districts[i].district_name}'))
+		start_y += 1
+		term.set_cursor_position(x: start_x, y: start_y)
+	}
+	term.set_cursor_position(x: 0, y: height)
+	for {
+        if var := os.input_opt('Please select a District: ') {
+            if var.int() < 0 || var.int() >= districts.len {
+                continue
+            }
+			setup_termui(state,districts[var.int()])
+            break
+        }
+        println('')
+        break
+    }
 	
 }
\ No newline at end of file
-- 
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