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:-( |
defmodule DaProductAppWeb.Api.V1.PartnerMerchantController do |
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@moduledoc """ |
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API controller for partner merchant management. |
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Allows partners to enroll, manage, and configure their merchants |
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for UPI International payment processing. |
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""" |
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:-( |
use DaProductAppWeb, :controller |
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alias DaProductApp.Merchants |
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alias DaProductApp.Partners |
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alias DaProductApp.Merchants.Merchant |
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action_fallback DaProductAppWeb.FallbackController |
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# ================================ |
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# MERCHANT ENROLLMENT & MANAGEMENT |
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# ================================ |
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|
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@doc """ |
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Enroll a new merchant under partner. |
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POST /api/v1/partners/:partner_id/merchants |
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""" |
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def create(conn, %{"partner_id" => partner_id} = params) do |
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:-( |
with {:ok, partner} <- validate_partner(partner_id), |
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:-( |
{:ok, attrs} <- validate_merchant_attrs(params), |
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:-( |
{:ok, %Merchant{} = merchant} <- Merchants.create_merchant(partner.id, attrs) do |
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|
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conn |
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|> put_status(:created) |
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:-( |
|> json(%{ |
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success: true, |
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data: format_merchant(merchant), |
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message: "Merchant enrolled successfully" |
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}) |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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{:error, %Ecto.Changeset{} = changeset} -> |
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conn |
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|> put_status(:unprocessable_entity) |
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:-( |
|> json(%{success: false, errors: format_changeset_errors(changeset)}) |
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|
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{:error, :bad_request, message} -> |
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conn |
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|> put_status(:bad_request) |
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:-( |
|> json(%{success: false, error: message}) |
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end |
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end |
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@doc """ |
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List all merchants for a partner. |
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GET /api/v1/partners/:partner_id/merchants |
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""" |
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def index(conn, %{"partner_id" => partner_id} = params) do |
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:-( |
with {:ok, partner} <- validate_partner(partner_id) do |
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:-( |
opts = [ |
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status: params["status"], |
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corridor: params["corridor"], |
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page: parse_int(params["page"]), |
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per_page: parse_int(params["per_page"]) || 20 |
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] |
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|
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:-( |
merchants = Merchants.list_partner_merchants(partner.id, opts) |
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conn |
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:-( |
|> json(%{ |
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success: true, |
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data: Enum.map(merchants, &format_merchant_summary/1), |
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meta: %{total: length(merchants)} |
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}) |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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end |
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end |
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@doc """ |
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Get specific merchant details. |
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GET /api/v1/partners/:partner_id/merchants/:id |
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""" |
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def show(conn, %{"partner_id" => partner_id, "id" => merchant_id}) do |
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:-( |
with {:ok, _partner} <- validate_partner(partner_id), |
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%Merchant{} = merchant <- Merchants.get_merchant(merchant_id), |
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true <- merchant.partner_id == partner_id do |
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conn |
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|> json(%{ |
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success: true, |
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data: format_merchant_detail(merchant) |
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}) |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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|
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nil -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Merchant not found"}) |
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false -> |
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conn |
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|> put_status(:forbidden) |
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|> json(%{success: false, error: "Merchant does not belong to this partner"}) |
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end |
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end |
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@doc """ |
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Update merchant information. |
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PUT /api/v1/partners/:partner_id/merchants/:id |
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""" |
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def update(conn, %{"partner_id" => partner_id, "id" => merchant_id} = params) do |
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:-( |
with {:ok, _partner} <- validate_partner(partner_id), |
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%Merchant{} = merchant <- Merchants.get_merchant(merchant_id), |
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true <- merchant.partner_id == partner_id, |
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{:ok, attrs} <- validate_merchant_update_attrs(params), |
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{:ok, %Merchant{} = updated_merchant} <- Merchants.update_merchant(merchant, attrs) do |
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conn |
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|> json(%{ |
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success: true, |
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data: format_merchant(updated_merchant), |
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message: "Merchant updated successfully" |
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}) |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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|
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nil -> |
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conn |
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|> put_status(:not_found) |
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|> json(%{success: false, error: "Merchant not found"}) |
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false -> |
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conn |
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|> put_status(:forbidden) |
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:-( |
|> json(%{success: false, error: "Merchant does not belong to this partner"}) |
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{:error, %Ecto.Changeset{} = changeset} -> |
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conn |
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|> put_status(:unprocessable_entity) |
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|> json(%{success: false, errors: format_changeset_errors(changeset)}) |
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end |
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end |
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@doc """ |
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Update merchant status (ACTIVE, SUSPENDED, INACTIVE). |
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PATCH /api/v1/partners/:partner_id/merchants/:id/status |
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""" |
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def update_status(conn, %{"partner_id" => partner_id, "id" => merchant_id, "status" => status}) do |
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:-( |
with {:ok, _partner} <- validate_partner(partner_id), |
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:-( |
%Merchant{} = merchant <- Merchants.get_merchant(merchant_id), |
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:-( |
true <- merchant.partner_id == partner_id, |
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:-( |
true <- status in ["ACTIVE", "SUSPENDED", "INACTIVE"], |
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:-( |
{:ok, %Merchant{} = updated_merchant} <- Merchants.update_merchant_status(merchant_id, status) do |
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|
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conn |
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:-( |
|> json(%{ |
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success: true, |
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data: format_merchant(updated_merchant), |
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message: "Merchant status updated successfully" |
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}) |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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|
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nil -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Merchant not found"}) |
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|
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false -> |
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conn |
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|> put_status(:forbidden) |
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:-( |
|> json(%{success: false, error: "Invalid status or merchant access denied"}) |
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end |
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end |
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# ================================ |
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# MERCHANT VALIDATION & LIMITS |
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# ================================ |
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|
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@doc """ |
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Validate merchant for transaction processing. |
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GET /api/v1/partners/:partner_id/merchants/:id/validate |
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""" |
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def validate_merchant(conn, %{"partner_id" => partner_id, "id" => merchant_id}) do |
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:-( |
with {:ok, _partner} <- validate_partner(partner_id), |
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:-( |
%Merchant{} = merchant <- Merchants.get_merchant(merchant_id), |
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:-( |
true <- merchant.partner_id == partner_id do |
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|
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:-( |
case Merchants.validate_merchant_for_transaction(merchant_id) do |
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{:ok, _merchant} -> |
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conn |
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:-( |
|> json(%{ |
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success: true, |
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data: %{valid: true, message: "Merchant is valid for transactions"} |
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}) |
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{:error, reason} -> |
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conn |
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:-( |
|> json(%{ |
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success: true, |
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data: %{valid: false, message: reason} |
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}) |
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end |
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else |
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{:error, :not_found} -> |
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conn |
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|> put_status(:not_found) |
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:-( |
|> json(%{success: false, error: "Partner not found"}) |
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|
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nil -> |
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conn |
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|> put_status(:not_found) |
| 233 |
:-( |
|> json(%{success: false, error: "Merchant not found"}) |
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|
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false -> |
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conn |
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|> put_status(:forbidden) |
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:-( |
|> json(%{success: false, error: "Merchant access denied"}) |
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end |
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end |
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@doc """ |
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Check transaction limits for merchant. |
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POST /api/v1/partners/:partner_id/merchants/:id/check-limits |
| 246 |
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""" |
| 247 |
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def check_limits(conn, %{"partner_id" => partner_id, "id" => merchant_id, "amount" => amount}) do |
| 248 |
:-( |
with {:ok, _partner} <- validate_partner(partner_id), |
| 249 |
:-( |
%Merchant{} = merchant <- Merchants.get_merchant(merchant_id), |
| 250 |
:-( |
true <- merchant.partner_id == partner_id, |
| 251 |
:-( |
{:ok, decimal_amount} <- parse_decimal(amount) do |
| 252 |
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|
| 253 |
:-( |
case Merchants.check_transaction_limits(merchant, decimal_amount) do |
| 254 |
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:ok -> |
| 255 |
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conn |
| 256 |
:-( |
|> json(%{ |
| 257 |
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success: true, |
| 258 |
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data: %{allowed: true, message: "Transaction within limits"} |
| 259 |
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}) |
| 260 |
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|
| 261 |
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{:error, reason} -> |
| 262 |
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conn |
| 263 |
:-( |
|> json(%{ |
| 264 |
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success: true, |
| 265 |
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data: %{allowed: false, message: reason} |
| 266 |
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}) |
| 267 |
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end |
| 268 |
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else |
| 269 |
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{:error, :not_found} -> |
| 270 |
|
conn |
| 271 |
|
|> put_status(:not_found) |
| 272 |
:-( |
|> json(%{success: false, error: "Partner not found"}) |
| 273 |
|
|
| 274 |
|
nil -> |
| 275 |
|
conn |
| 276 |
|
|> put_status(:not_found) |
| 277 |
:-( |
|> json(%{success: false, error: "Merchant not found"}) |
| 278 |
|
|
| 279 |
|
false -> |
| 280 |
|
conn |
| 281 |
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|> put_status(:forbidden) |
| 282 |
:-( |
|> json(%{success: false, error: "Merchant access denied"}) |
| 283 |
|
|
| 284 |
|
{:error, :invalid_amount} -> |
| 285 |
|
conn |
| 286 |
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|> put_status(:bad_request) |
| 287 |
:-( |
|> json(%{success: false, error: "Invalid amount format"}) |
| 288 |
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end |
| 289 |
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end |
| 290 |
|
|
| 291 |
|
# ================================ |
| 292 |
|
# MERCHANT SEARCH & ANALYTICS |
| 293 |
|
# ================================ |
| 294 |
|
|
| 295 |
|
@doc """ |
| 296 |
|
Search merchants with filters. |
| 297 |
|
|
| 298 |
|
GET /api/v1/partners/:partner_id/merchants/search |
| 299 |
|
""" |
| 300 |
|
def search(conn, %{"partner_id" => partner_id} = params) do |
| 301 |
:-( |
with {:ok, partner} <- validate_partner(partner_id) do |
| 302 |
:-( |
search_params = %{ |
| 303 |
:-( |
partner_id: partner.id, |
| 304 |
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status: params["status"], |
| 305 |
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corridor: params["corridor"], |
| 306 |
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business_type: params["business_type"], |
| 307 |
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search: params["q"], |
| 308 |
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sort: params["sort"], |
| 309 |
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order: params["order"], |
| 310 |
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page: parse_int(params["page"]), |
| 311 |
:-( |
per_page: parse_int(params["per_page"]) || 20 |
| 312 |
|
} |
| 313 |
|
|
| 314 |
:-( |
merchants = Merchants.search_merchants(search_params) |
| 315 |
|
|
| 316 |
|
conn |
| 317 |
:-( |
|> json(%{ |
| 318 |
|
success: true, |
| 319 |
|
data: Enum.map(merchants, &format_merchant_summary/1), |
| 320 |
|
meta: %{total: length(merchants)} |
| 321 |
|
}) |
| 322 |
|
else |
| 323 |
|
{:error, :not_found} -> |
| 324 |
|
conn |
| 325 |
|
|> put_status(:not_found) |
| 326 |
:-( |
|> json(%{success: false, error: "Partner not found"}) |
| 327 |
|
end |
| 328 |
|
end |
| 329 |
|
|
| 330 |
|
@doc """ |
| 331 |
|
Get merchant statistics for partner. |
| 332 |
|
|
| 333 |
|
GET /api/v1/partners/:partner_id/merchants/stats |
| 334 |
|
""" |
| 335 |
|
def stats(conn, %{"partner_id" => partner_id}) do |
| 336 |
:-( |
with {:ok, partner} <- validate_partner(partner_id) do |
| 337 |
:-( |
stats = %{ |
| 338 |
:-( |
total_merchants: Merchants.count_partner_merchants(partner.id), |
| 339 |
:-( |
active_merchants: Merchants.list_partner_merchants(partner.id, status: "ACTIVE") |> length(), |
| 340 |
:-( |
by_corridor: get_corridor_stats(partner.id), |
| 341 |
:-( |
by_business_type: get_business_type_stats(partner.id) |
| 342 |
|
} |
| 343 |
|
|
| 344 |
|
conn |
| 345 |
:-( |
|> json(%{ |
| 346 |
|
success: true, |
| 347 |
|
data: stats |
| 348 |
|
}) |
| 349 |
|
else |
| 350 |
|
{:error, :not_found} -> |
| 351 |
|
conn |
| 352 |
|
|> put_status(:not_found) |
| 353 |
:-( |
|> json(%{success: false, error: "Partner not found"}) |
| 354 |
|
end |
| 355 |
|
end |
| 356 |
|
|
| 357 |
|
# ================================ |
| 358 |
|
# PRIVATE HELPER FUNCTIONS |
| 359 |
|
# ================================ |
| 360 |
|
|
| 361 |
|
defp validate_partner(partner_id) do |
| 362 |
:-( |
case Partners.get_partner(partner_id) do |
| 363 |
:-( |
%Partners.Partner{} = partner -> {:ok, partner} |
| 364 |
:-( |
nil -> {:error, :not_found} |
| 365 |
|
end |
| 366 |
|
end |
| 367 |
|
|
| 368 |
|
defp validate_merchant_attrs(params) do |
| 369 |
:-( |
required_fields = ["merchant_code", "brand_name", "merchant_vpa"] |
| 370 |
|
|
| 371 |
:-( |
case check_required_fields(params, required_fields) do |
| 372 |
|
:ok -> |
| 373 |
:-( |
attrs = %{ |
| 374 |
|
"merchant_code" => params["merchant_code"], |
| 375 |
|
"brand_name" => params["brand_name"], |
| 376 |
|
"merchant_vpa" => params["merchant_vpa"], |
| 377 |
:-( |
"mid" => params["mid"] || generate_mid(), |
| 378 |
:-( |
"tid" => params["tid"] || generate_tid(), |
| 379 |
:-( |
"business_type" => params["business_type"] || "RETAIL", |
| 380 |
:-( |
"merchant_type" => params["merchant_type"] || "SMALL", |
| 381 |
:-( |
"merchant_genre" => params["merchant_genre"] || "RETAIL", |
| 382 |
:-( |
"corridor" => params["corridor"] || "DOMESTIC", |
| 383 |
|
"legal_name" => params["legal_name"], |
| 384 |
|
"contact_email" => params["contact_email"], |
| 385 |
|
"contact_phone" => params["contact_phone"], |
| 386 |
|
"address" => params["address"], |
| 387 |
|
"city" => params["city"], |
| 388 |
|
"state" => params["state"], |
| 389 |
|
"pincode" => params["pincode"], |
| 390 |
|
"max_transaction_limit" => params["max_transaction_limit"], |
| 391 |
|
"daily_transaction_limit" => params["daily_transaction_limit"], |
| 392 |
:-( |
"settlement_frequency" => params["settlement_frequency"] || "T+1", |
| 393 |
|
"settlement_account_number" => params["settlement_account_number"], |
| 394 |
|
"settlement_account_ifsc" => params["settlement_account_ifsc"] |
| 395 |
|
} |
| 396 |
|
{:ok, attrs} |
| 397 |
|
|
| 398 |
|
{:error, missing_fields} -> |
| 399 |
:-( |
{:error, :bad_request, "Missing required fields: #{Enum.join(missing_fields, ", ")}"} |
| 400 |
|
end |
| 401 |
|
end |
| 402 |
|
|
| 403 |
|
defp validate_merchant_update_attrs(params) do |
| 404 |
|
# Allow updating most fields except core identifiers |
| 405 |
:-( |
restricted_fields = ["merchant_code", "mid", "tid", "partner_id"] |
| 406 |
|
|
| 407 |
:-( |
attrs = params |
| 408 |
|
|> Map.drop(restricted_fields) |
| 409 |
|
|> Map.drop(["partner_id", "id"]) |
| 410 |
|
|
| 411 |
|
{:ok, attrs} |
| 412 |
|
end |
| 413 |
|
|
| 414 |
|
defp check_required_fields(params, required_fields) do |
| 415 |
:-( |
missing_fields = Enum.filter(required_fields, fn field -> |
| 416 |
:-( |
is_nil(params[field]) or params[field] == "" |
| 417 |
|
end) |
| 418 |
|
|
| 419 |
:-( |
case missing_fields do |
| 420 |
:-( |
[] -> :ok |
| 421 |
:-( |
missing -> {:error, missing} |
| 422 |
|
end |
| 423 |
|
end |
| 424 |
|
|
| 425 |
|
# JSON formatting functions |
| 426 |
|
defp format_merchant(merchant) do |
| 427 |
:-( |
%{ |
| 428 |
:-( |
id: merchant.id, |
| 429 |
:-( |
merchant_code: merchant.merchant_code, |
| 430 |
:-( |
mid: merchant.mid, |
| 431 |
:-( |
tid: merchant.tid, |
| 432 |
:-( |
brand_name: merchant.brand_name, |
| 433 |
:-( |
merchant_vpa: merchant.merchant_vpa, |
| 434 |
:-( |
business_type: merchant.business_type, |
| 435 |
:-( |
corridor: merchant.corridor, |
| 436 |
:-( |
local_currency: merchant.local_currency, |
| 437 |
:-( |
status: merchant.status, |
| 438 |
:-( |
compliance_status: merchant.compliance_status, |
| 439 |
:-( |
qr_enabled: merchant.qr_enabled, |
| 440 |
:-( |
max_transaction_limit: merchant.max_transaction_limit, |
| 441 |
:-( |
contact_email: merchant.contact_email, |
| 442 |
:-( |
contact_phone: merchant.contact_phone, |
| 443 |
:-( |
onboarded_at: merchant.onboarded_at, |
| 444 |
:-( |
updated_at: merchant.updated_at |
| 445 |
|
} |
| 446 |
|
end |
| 447 |
|
|
| 448 |
|
defp format_merchant_summary(merchant) do |
| 449 |
:-( |
%{ |
| 450 |
:-( |
id: merchant.id, |
| 451 |
:-( |
merchant_code: merchant.merchant_code, |
| 452 |
:-( |
brand_name: merchant.brand_name, |
| 453 |
:-( |
merchant_vpa: merchant.merchant_vpa, |
| 454 |
:-( |
corridor: merchant.corridor, |
| 455 |
:-( |
status: merchant.status, |
| 456 |
:-( |
compliance_status: merchant.compliance_status, |
| 457 |
:-( |
onboarded_at: merchant.onboarded_at |
| 458 |
|
} |
| 459 |
|
end |
| 460 |
|
|
| 461 |
|
defp format_merchant_detail(merchant) do |
| 462 |
:-( |
Map.merge(format_merchant(merchant), %{ |
| 463 |
:-( |
legal_name: merchant.legal_name, |
| 464 |
:-( |
address: merchant.address, |
| 465 |
:-( |
city: merchant.city, |
| 466 |
:-( |
state: merchant.state, |
| 467 |
:-( |
pincode: merchant.pincode, |
| 468 |
:-( |
settlement_frequency: merchant.settlement_frequency, |
| 469 |
:-( |
settlement_account_number: merchant.settlement_account_number, |
| 470 |
:-( |
settlement_account_ifsc: merchant.settlement_account_ifsc, |
| 471 |
:-( |
risk_category: merchant.risk_category, |
| 472 |
:-( |
last_transaction_at: merchant.last_transaction_at |
| 473 |
|
}) |
| 474 |
|
end |
| 475 |
|
|
| 476 |
|
defp format_changeset_errors(changeset) do |
| 477 |
:-( |
Ecto.Changeset.traverse_errors(changeset, fn {msg, opts} -> |
| 478 |
:-( |
Enum.reduce(opts, msg, fn {key, value}, acc -> |
| 479 |
:-( |
String.replace(acc, "%{#{key}}", to_string(value)) |
| 480 |
|
end) |
| 481 |
|
end) |
| 482 |
|
end |
| 483 |
|
|
| 484 |
:-( |
defp parse_int(nil), do: nil |
| 485 |
:-( |
defp parse_int(value) when is_integer(value), do: value |
| 486 |
|
defp parse_int(value) when is_binary(value) do |
| 487 |
:-( |
case Integer.parse(value) do |
| 488 |
:-( |
{int, ""} -> int |
| 489 |
:-( |
_ -> nil |
| 490 |
|
end |
| 491 |
|
end |
| 492 |
|
|
| 493 |
|
defp parse_decimal(value) when is_binary(value) do |
| 494 |
:-( |
case Decimal.parse(value) do |
| 495 |
:-( |
{decimal, ""} -> {:ok, decimal} |
| 496 |
:-( |
_ -> {:error, :invalid_amount} |
| 497 |
|
end |
| 498 |
|
end |
| 499 |
:-( |
defp parse_decimal(value) when is_number(value) do |
| 500 |
|
{:ok, Decimal.new(value)} |
| 501 |
|
end |
| 502 |
:-( |
defp parse_decimal(_), do: {:error, :invalid_amount} |
| 503 |
|
|
| 504 |
|
defp generate_mid do |
| 505 |
:-( |
"MID" <> (:crypto.strong_rand_bytes(6) |> Base.encode16(case: :upper)) |
| 506 |
|
end |
| 507 |
|
|
| 508 |
|
defp generate_tid do |
| 509 |
:-( |
"TID" <> (:crypto.strong_rand_bytes(3) |> Base.encode16(case: :upper)) |
| 510 |
|
end |
| 511 |
|
|
| 512 |
|
defp get_corridor_stats(partner_id) do |
| 513 |
|
# This would be implemented with proper aggregation queries |
| 514 |
:-( |
%{ |
| 515 |
|
"SINGAPORE" => 0, |
| 516 |
|
"UAE" => 0, |
| 517 |
|
"USA" => 0, |
| 518 |
|
"DOMESTIC" => 0 |
| 519 |
|
} |
| 520 |
|
end |
| 521 |
|
|
| 522 |
|
defp get_business_type_stats(partner_id) do |
| 523 |
|
# This would be implemented with proper aggregation queries |
| 524 |
:-( |
%{ |
| 525 |
|
"RETAIL" => 0, |
| 526 |
|
"ECOMMERCE" => 0, |
| 527 |
|
"SERVICES" => 0 |
| 528 |
|
} |
| 529 |
|
end |
| 530 |
|
end |