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%% Copyright (c) 2023 Peter Morgan <peter.james.morgan@gmail.com> |
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%% |
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%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%% you may not use this file except in compliance with the License. |
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%% You may obtain a copy of the License at |
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%% |
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%% http://www.apache.org/licenses/LICENSE-2.0 |
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%% |
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%% Unless required by applicable law or agreed to in writing, software |
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%% distributed under the License is distributed on an "AS IS" BASIS, |
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%% See the License for the specific language governing permissions and |
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%% limitations under the License. |
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-module(pgmp_dbs_sup). |
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-behaviour(supervisor). |
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-export([default/1]). |
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-export([init/1]). |
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-export([start_child/1]). |
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-export([start_link/0]). |
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-export_type([db/0]). |
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-import(pgmp_sup, [supervisor/1]). |
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-type db() :: #{user := binary(), |
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password => fun (() -> binary()), |
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port := binary(), |
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host := binary(), |
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scope => atom(), |
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group => atom(), |
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application_name => binary(), |
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database := binary()}. |
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start_link() -> |
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supervisor:start_link({local, ?MODULE}, ?MODULE, []). |
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start_child(URI) when is_list(URI) -> |
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:-( |
?FUNCTION_NAME(list_to_binary(URI)); |
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start_child(URI) when is_binary(URI) -> |
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:-( |
supervisor:start_child( |
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?MODULE, |
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child_spec(maps:merge(default(), pgmp_uri:parse(URI)))). |
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init([]) -> |
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{ok, {pgmp_config:sup_flags(?MODULE), children()}}. |
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children() -> |
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[child_spec(DB) || DB <- dbs(), pgmp_config:enabled(connect)]. |
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child_spec(#{application_name := ApplicationName} = DB) -> |
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supervisor( |
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#{id => ApplicationName, |
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m => pgmp_db_sup, |
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args => [DB]}). |
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-spec dbs() -> [db()]. |
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dbs() -> |
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try |
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lists:map( |
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fun |
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(URI) -> |
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maps:merge(default(), pgmp_uri:parse(URI)) |
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end, |
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string:split( |
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pgmp_config:database(uri), |
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pgmp_config:database(uri_separator), |
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all)) |
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catch |
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error:badarg -> |
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[default()] |
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end. |
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default() -> |
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lists:foldl( |
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fun |
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(Parameter, A) -> |
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A#{Parameter => default(Parameter)} |
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end, |
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#{}, |
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[user, |
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application_name, |
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password, |
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port, |
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host, |
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database]). |
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default(password = Parameter) -> |
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fun |
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() -> |
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pgmp_config:database(Parameter) |
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end; |
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default(host) -> |
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pgmp_config:database(hostname); |
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default(database) -> |
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pgmp_config:database(name); |
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default(Parameter) -> |
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pgmp_config:database(Parameter). |