Custom Commands

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Custom Commands
Custom commands - abbreviated as CCs, allow you to create your own commands. The CC-system in YAGPDB is quite complex and can be used for some advanced stuff, but even CCs are still limited and if your use case is very specific, consider trying or building another bot. Additional reading here. Custom Commands have also limits and they are covered here.
Custom Commands
To create your first custom command, go to the control panel and select your server. There you click on Commands and Custom Commands. 
The Custom Command Page
Trigger Types
Command: With this trigger, the message has to start with the prefix for your server (- by default) followed by the trigger.
Starts with: When a message starts with your trigger.
Contains: When a message contains your trigger.
Regex: This trigger allows you to use a regex pattern. (Refer to the Regex page for help).
Exact match: When the entire message equals your trigger.
Reaction: CC is triggered by reactions.
Hourly interval: This will trigger after specified time given in hours. User can exclude certain hours and also weekdays. Channel must be selected for this trigger to work.
Minute interval: Like hourly interval, the specified time is just in minutes starting from 5 min as minimum.
Case Sensitivity
As you might have seen, there is an option called Case sensitive. This option makes your trigger case-sensitive. The trigger heLLo with case sensitivity on will only trigger if somebody says heLLo but not if someone says hello.
Restrictions to roles or channels
You can restrict or block custom commands to specific roles or channels. For this you have to select the corresponding checkbox and select the roles/channels you want it to apply too.
This custom command can be executed by people that either have Coll Dog, Guy-in-charge or both.
If you select theRequire at least one of theorOnly run in the Options, make sure to always have a role/channel selected otherwise the bot won't respond to your commands.
Restrictions and limitations
With custom commands there are some limitations:
You can't create more than 100 active custom commands (250 with YAGPDB Premium)
You can't execute more than five commands from a custom command using execAdmin or exec
Direct Messages can be only sent with a side note from which server they're coming
Custom Command responses can't be longer than 2000 characters (this is a limitation by discord)
A Custom command itself can't be longer than 10 000 characters (this is total count of characters and sum of all subset custom command's responses of 20), also leave/join messages limit is 5000.
Custom Commands are limited to 5 userArg calls, 5 exec/execAdmin functions, 10 template function and regex calls.
No more than 3 custom commands may be executed from a single message for non-premium. The limit is 5 for premium servers.
Advanced Custom Commands 
Some basic coding knowledge may be required to use some of these features. 
Using templates in custom commands
If you wish to do anything more than a "Type in a command" -> "Make the bot say something. Such as assigning people roles, getting information on the person calling the command, writing messages in other channels, and many others. It is recommended that you check out this page:
Templates
Require arguments
As of v1.12 there's a simple set of functions available for you to manage arguments, they are:
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{{$args := parseArgs num-required-args "Custom usage text when invalid args provided"
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    (carg "int" "name of arg1")
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    (carg "string" "name of arg2")
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    (more args can be added aswell...)}}
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...
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​
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{{$args.Get 0}} {{/* <- will have the first arg */}}
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{{$args.Get 1}} {{/* <- will have the second arg */}}
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The execution will stop at wherever you placed "parseArgs" if incorrect args are passed.
"carg" has the following syntax:
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{{carg "type" "name" additional-options-depending-on-type}}
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Available types and options are:
channel - channel id/mention, will have the type of *templates.CtxChannel (see templates for more info). Threads are not supported
duration - converts given integer number starting from minutes or string with modifier (s, m, h, w etc)  to type Duration - e.g. 10 is 10m0s and 123s is 2m3s (type time.Duration is represented as an int64 nanosecond count - so 5s would be 5000000000). Has additional options after the name for min and max range of duration presented in nanoseconds.
float - decimal numbers, you can also optionally specify min and max after the name similar to int. It is parsed as float64 datatype.
int - whole numbers, you can also optionally specify min and max after the name. For example
{{carg "int" "integer" 2 9}} required argument has to be a number from 2 to 9.
member - accepts userID/mention. Gives guild's member struct (object) to use later with .Member methods, like .JoinedAt. (see templates for more info).
role - matches an id or name of a role and returns a *discordgo.Role type role object.
string - text.
user - user mentions, will have the type of User (see templates for more info).
userid - user IDs, this user may not exist at all, both mentions and plain IDs are accepted, will have the type of int64.
To access the parsed args you use the "Get" method on the returned object from parseArgs, this function takes in the argument index starting from 0.
Method "IsSet" will return a boolean true or false depending on whether the argument was set or not, if this was an optional argument.
Example usage of optional args:
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{{$args := parseArgs 1 "Custom usage text when invalid args provided"
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    (carg "int" "name of arg1")
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    (carg "string" "name of arg2 (optional)")
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    (more args can be added aswell...)}}
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...
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​
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{{$args.Get 0}} {{/* <- will have the first arg */}}
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{{or ($args.Get 1) "value if the second arg was not used"}}
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{{if $args.IsSet 1}} only runs if the second argument was provided {{end}}
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The Message template
You can fetch a message by ID or use the trigger message and get some information about it. Message returns the following things that you can access with it:

Message
Field
Type
Description
.Message.ID
Int
ID of the message
.Message.ChannelID
Int
Channel id this message is in
.Message.Author
​User Object​
Author of the message (User object)
.Message.Timestamp
String
Timestamp of the message (use .Message.Timestamp.Parse for a time object, otherwise string)
.Message.Attachments
Array of Attachments​
Attachments to this message (slice of attachment objects)
.Message.Embeds
Array of Embeds​
Embeds on this message (slice of embed objects)
.Message.Mentions
Array of User Object​
Users this message mentions
.Message.Reactions
Array of Reactions​
Reactions on this message (only available form getMessage)
.Message.Content
String
Text content on this message
Attachment
Either starts with  (index .Message.Attachments 0). or a variable with the attachment type.
Field
Type
Description
.ID
Int
The ID of the attachment
.URL
String
cdn.discordapp.com URL
.ProxyURL
String
media.discordapp.com URL
.Filename
String
Filename of the attachment
.Width
Int
Width of the attachment (if image) in pixels
.Height
Int
Height of the attachment (if image) in pixels
.Size
Int
Size of the attachment in bytes
Reaction
Either starts with (index .Message.Reactions 0) or a variable with the reaction type.
Field
Type
Description
.Count
Int
Times this emoji has been used to react
.Emoji
​Emoji​
The emoji used in the reaction
Emoji
Either starts with (index .Message.Reactions 0).Emoji or a variable of the reaction type.
Field
Type
Description
.ID
Int
ID of the emoji
.Name
String
Name of the emoji (if Unicode emoji this will be the emote)
.Animated
Boolean
Whether the emoji is animated or not
Method
Description
.APIName
Returns a correctly formatted API name for use with reaction functions. Example output: emojiname:id
.MessageFormat
Returns a correctly formatted emoji for use in message content.
There are more fields which can be used, but they are either obsolete or only used with Global Emotes.
Example to fetch the name of the first reaction on a message provided through the getMessage template:
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{{$message := getMessage nil (index .Args 1)}}
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{{if $message}}
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{{if $message.Reactions}}
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Name of the first reaction: {{(index $message.Reactions 0).Emoji.Name}}
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{{else}}No reactions on this message{{end}}
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{{else}}Unknown message{{end}}
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currentTime template
The currentTime template is very extensive and can be used for displaying the current time, for different time zones, or in embeds in the "timestamp" field.

even more in depth here > https://golang.org/pkg/time/​
As timestamp in an embed
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{{ $embed := cembed "timestamp" currentTime }}
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{{/* golang time formating is POSIX form 0 1 2 3 4 5 6 > Mon 2 Jan 15:04:05 2006 (timezone calculation is omitted) */}}
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{{/* currentTime.UTC.Format "15:04"  > gives current time in UTC */}}
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{{/* ".Add" adds time in nanoseconds, in this example 2 hours have been added for UTC+2 */}}
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{{ $marker := "void" }}
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​
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{{ if gt ( toInt ( currentTime.UTC.Format "15" ) ) 12 }}
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{{ $marker = "PM" }}
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{{ else }}
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{{ $marker = "AM" }}
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{{ end }}
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​
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{{/* current time in UTC+2 and in 12H format */}}
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{{ ( joinStr " " ( ( currentTime.Add 7200000000000 ).Format "3:04"  ) $marker ) }}
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​
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It's the {{currentTime.Day}}. of {{currentTime.Month}} in the year {{currentTime.Year}}!
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{{/*Protip: you can put PM in the format string as "3:04PM"
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the variable $marker is there just to show if comparison as well.
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More > https://golang.org/pkg/time/#pkg-constants*/}}
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Examples of custom commands
You can find multiple examples on the YAGPDB Community & Support Server or in this list (with explanations):
Custom Commands Examples
Last modified 8h ago
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Contents
Custom Commands
Trigger Types
Restrictions to roles or channels
Restrictions and limitations
Advanced Custom Commands
Using templates in custom commands
Require arguments
The Message template
currentTime template
Examples of custom commands