Adding page size option to LDAP (#3439)

i18n/en.json

@@ -2531,6 +2531,14 @@
     "id": "model.config.is_valid.ldap_sync_interval.app_error",
     "translation": "Invalid sync interval time. Must be at least one minute."
   },
+  {
+    "id": "model.config.is_valid.ldap_required.app_error",
+    "translation": "Required LDAP field missing."
+  },
+  {
+    "id": "model.config.is_valid.ldap_max_page_size.app_error",
+    "translation": "Invalid max page size value."
+  },
   {
     "id": "model.config.is_valid.listen_address.app_error",
     "translation": "Invalid listen address for service settings Must be set."

model/config.go

@@ -208,6 +208,7 @@ type LdapSettings struct {
 	// Advanced
 	SkipCertificateVerification *bool
 	QueryTimeout                *int
+	MaxPageSize                 *int
 
 	// Customization
 	LoginFieldName *string
@@ -526,6 +527,11 @@ func (o *Config) SetDefaults() {
 		*o.LdapSettings.QueryTimeout = 60
 	}
 
+	if o.LdapSettings.MaxPageSize == nil {
+		o.LdapSettings.MaxPageSize = new(int)
+		*o.LdapSettings.MaxPageSize = 0
+	}
+
 	if o.LdapSettings.LoginFieldName == nil {
 		o.LdapSettings.LoginFieldName = new(string)
 		*o.LdapSettings.LoginFieldName = ""
@@ -724,6 +730,10 @@ func (o *Config) IsValid() *AppError {
 		return NewLocAppError("Config.IsValid", "model.config.is_valid.ldap_sync_interval.app_error", nil, "")
 	}
 
+	if *o.LdapSettings.MaxPageSize < 0 {
+		return NewLocAppError("Config.IsValid", "model.config.is_valid.ldap_max_page_size.app_error", nil, "")
+	}
+
 	if *o.LdapSettings.Enable {
 		if *o.LdapSettings.LdapServer == "" ||
 			*o.LdapSettings.BaseDN == "" ||

webapp/components/admin_console/ldap_settings.jsx

@@ -38,6 +38,7 @@ export default class LdapSettings extends AdminSettings {
             syncIntervalMinutes: props.config.LdapSettings.SyncIntervalMinutes,
             skipCertificateVerification: props.config.LdapSettings.SkipCertificateVerification,
             queryTimeout: props.config.LdapSettings.QueryTimeout,
+            maxPageSize: props.config.LdapSettings.MaxPageSize,
             loginFieldName: props.config.LdapSettings.LoginFieldName
         });
     }
@@ -60,6 +61,7 @@ export default class LdapSettings extends AdminSettings {
         config.LdapSettings.SyncIntervalMinutes = this.parseIntNonZero(this.state.syncIntervalMinutes);
         config.LdapSettings.SkipCertificateVerification = this.state.skipCertificateVerification;
         config.LdapSettings.QueryTimeout = this.parseIntNonZero(this.state.queryTimeout);
+        config.LdapSettings.MaxPageSize = this.parseInt(this.state.maxPageSize);
         config.LdapSettings.LoginFieldName = this.state.loginFieldName;
 
         return config;
@@ -386,6 +388,25 @@ export default class LdapSettings extends AdminSettings {
                     onChange={this.handleChange}
                     disabled={!this.state.enable}
                 />
+                <TextSetting
+                    id='maxPageSize'
+                    label={
+                        <FormattedMessage
+                            id='admin.ldap.maxPageSizeTitle'
+                            defaultMessage='Maximum Page Size'
+                        />
+                    }
+                    placeholder={Utils.localizeMessage('admin.ldap.maxPageSizeEx', 'Ex "2000"')}
+                    helpText={
+                        <FormattedMessage
+                            id='admin.ldap.maxPageSizeHelpText'
+                            defaultMessage='The maximum number of users the Mattermost server will request from the LDAP server at one time. 0 is unlimited.'
+                        />
+                    }
+                    value={this.state.maxPageSize}
+                    onChange={this.handleChange}
+                    disabled={!this.state.enable}
+                />
                 <TextSetting
                     id='loginFieldName'
                     label={

webapp/i18n/en.json

@@ -317,6 +317,9 @@
   "admin.ldap.queryDesc": "The timeout value for queries to the LDAP server. Increase if you are getting timeout errors caused by a slow LDAP server.",
   "admin.ldap.queryEx": "Ex \"60\"",
   "admin.ldap.queryTitle": "Query Timeout (seconds):",
+  "admin.ldap.maxPageSizeTitle": "Maximum Page Size",
+  "admin.ldap.maxPageSizeHelpText": "The maximum number of users the Mattermost server will request from the LDAP server at one time. 0 is unlimited.",
+  "admin.ldap.maxPageSizeEx": "Ex \"2000\"",
   "admin.ldap.serverDesc": "The domain or IP address of LDAP server.",
   "admin.ldap.serverEx": "Ex \"10.0.0.23\"",
   "admin.ldap.serverTitle": "LDAP Server:",