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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: uci.js</title>
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<h1 class="page-title">Source: uci.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>'use strict';
'require rpc';
/**
* @class uci
* @memberof LuCI
* @hideconstructor
* @classdesc
*
* The `LuCI.uci` class utilizes {@link LuCI.rpc} to declare low level
* remote UCI `ubus` procedures and implements a local caching and data
* manipulation layer on top to allow for synchroneous operations on
* UCI configuration data.
*/
return L.Class.extend(/** @lends LuCI.uci.prototype */ {
__init__: function() {
this.state = {
newidx: 0,
values: { },
creates: { },
changes: { },
deletes: { },
reorder: { }
};
this.loaded = {};
},
callLoad: rpc.declare({
object: 'uci',
method: 'get',
params: [ 'config' ],
expect: { values: { } }
}),
callOrder: rpc.declare({
object: 'uci',
method: 'order',
params: [ 'config', 'sections' ]
}),
callAdd: rpc.declare({
object: 'uci',
method: 'add',
params: [ 'config', 'type', 'name', 'values' ],
expect: { section: '' }
}),
callSet: rpc.declare({
object: 'uci',
method: 'set',
params: [ 'config', 'section', 'values' ]
}),
callDelete: rpc.declare({
object: 'uci',
method: 'delete',
params: [ 'config', 'section', 'options' ]
}),
callApply: rpc.declare({
object: 'uci',
method: 'apply',
params: [ 'timeout', 'rollback' ]
}),
callConfirm: rpc.declare({
object: 'uci',
method: 'confirm'
}),
/**
* Generates a new, unique section ID for the given configuration.
*
* Note that the generated ID is temporary, it will get replaced by an
* identifier in the form `cfgXXXXXX` once the configuration is saved
* by the remote `ubus` UCI api.
*
* @param {string} config
* The configuration to generate the new section ID for.
*
* @returns {string}
* A newly generated, unique section ID in the form `newXXXXXX`
* where `X` denotes a hexadecimal digit.
*/
createSID: function(conf) {
var v = this.state.values,
n = this.state.creates,
sid;
do {
sid = "new%06x".format(Math.random() * 0xFFFFFF);
} while ((n[conf] && n[conf][sid]) || (v[conf] && v[conf][sid]));
return sid;
},
/**
* Resolves a given section ID in extended notation to the internal
* section ID value.
*
* @param {string} config
* The configuration to resolve the section ID for.
*
* @param {string} sid
* The section ID to resolve. If the ID is in the form `@typename[#]`,
* it will get resolved to an internal anonymous ID in the forms
* `cfgXXXXXX`/`newXXXXXX` or to the name of a section in case it points
* to a named section. When the given ID is not in extended notation,
* it will be returned as-is.
*
* @returns {string|null}
* Returns the resolved section ID or the original given ID if it was
* not in extended notation. Returns `null` when an extended ID could
* not be resolved to existing section ID.
*/
resolveSID: function(conf, sid) {
if (typeof(sid) != 'string')
return sid;
var m = /^@([a-zA-Z0-9_-]+)\[(-?[0-9]+)\]$/.exec(sid);
if (m) {
var type = m[1],
pos = +m[2],
sections = this.sections(conf, type),
section = sections[pos >= 0 ? pos : sections.length + pos];
return section ? section['.name'] : null;
}
return sid;
},
/* private */
reorderSections: function() {
var v = this.state.values,
n = this.state.creates,
r = this.state.reorder,
tasks = [];
if (Object.keys(r).length === 0)
return Promise.resolve();
/*
gather all created and existing sections, sort them according
to their index value and issue an uci order call
*/
for (var c in r) {
var o = [ ];
if (n[c])
for (var s in n[c])
o.push(n[c][s]);
for (var s in v[c])
o.push(v[c][s]);
if (o.length > 0) {
o.sort(function(a, b) {
return (a['.index'] - b['.index']);
});
var sids = [ ];
for (var i = 0; i < o.length; i++)
sids.push(o[i]['.name']);
tasks.push(this.callOrder(c, sids));
}
}
this.state.reorder = { };
return Promise.all(tasks);
},
/* private */
loadPackage: function(packageName) {
if (this.loaded[packageName] == null)
return (this.loaded[packageName] = this.callLoad(packageName));
return Promise.resolve(this.loaded[packageName]);
},
/**
* Loads the given UCI configurations from the remote `ubus` api.
*
* Loaded configurations are cached and only loaded once. Subsequent
* load operations of the same configurations will return the cached
* data.
*
* To force reloading a configuration, it has to be unloaded with
* {@link LuCI.uci#unload uci.unload()} first.
*
* @param {string|string[]} config
* The name of the configuration or an array of configuration
* names to load.
*
* @returns {Promise<string[]>}
* Returns a promise resolving to the names of the configurations
* that have been successfully loaded.
*/
load: function(packages) {
var self = this,
pkgs = [ ],
tasks = [];
if (!Array.isArray(packages))
packages = [ packages ];
for (var i = 0; i < packages.length; i++)
if (!self.state.values[packages[i]]) {
pkgs.push(packages[i]);
tasks.push(self.loadPackage(packages[i]));
}
return Promise.all(tasks).then(function(responses) {
for (var i = 0; i < responses.length; i++)
self.state.values[pkgs[i]] = responses[i];
if (responses.length)
document.dispatchEvent(new CustomEvent('uci-loaded'));
return pkgs;
});
},
/**
* Unloads the given UCI configurations from the local cache.
*
* @param {string|string[]} config
* The name of the configuration or an array of configuration
* names to unload.
*/
unload: function(packages) {
if (!Array.isArray(packages))
packages = [ packages ];
for (var i = 0; i < packages.length; i++) {
delete this.state.values[packages[i]];
delete this.state.creates[packages[i]];
delete this.state.changes[packages[i]];
delete this.state.deletes[packages[i]];
delete this.loaded[packages[i]];
}
},
/**
* Adds a new section of the given type to the given configuration,
* optionally named according to the given name.
*
* @param {string} config
* The name of the configuration to add the section to.
*
* @param {string} type
* The type of the section to add.
*
* @param {string} [name]
* The name of the section to add. If the name is omitted, an anonymous
* section will be added instead.
*
* @returns {string}
* Returns the section ID of the newly added section which is equivalent
* to the given name for non-anonymous sections.
*/
add: function(conf, type, name) {
var n = this.state.creates,
sid = name || this.createSID(conf);
if (!n[conf])
n[conf] = { };
n[conf][sid] = {
'.type': type,
'.name': sid,
'.create': name,
'.anonymous': !name,
'.index': 1000 + this.state.newidx++
};
return sid;
},
/**
* Removes the section with the given ID from the given configuration.
*
* @param {string} config
* The name of the configuration to remove the section from.
*
* @param {string} sid
* The ID of the section to remove.
*/
remove: function(conf, sid) {
var n = this.state.creates,
c = this.state.changes,
d = this.state.deletes;
/* requested deletion of a just created section */
if (n[conf] && n[conf][sid]) {
delete n[conf][sid];
}
else {
if (c[conf])
delete c[conf][sid];
if (!d[conf])
d[conf] = { };
d[conf][sid] = true;
}
},
/**
* A section object represents the options and their corresponding values
* enclosed within a configuration section, as well as some additional
* meta data such as sort indexes and internal ID.
*
* Any internal metadata fields are prefixed with a dot which is isn't
* an allowed character for normal option names.
*
* @typedef {Object<string, boolean|number|string|string[]>} SectionObject
* @memberof LuCI.uci
*
* @property {boolean} .anonymous
* The `.anonymous` property specifies whether the configuration is
* anonymous (`true`) or named (`false`).
*
* @property {number} .index
* The `.index` property specifes the sort order of the section.
*
* @property {string} .name
* The `.name` property holds the name of the section object. It may be
* either an anonymous ID in the form `cfgXXXXXX` or `newXXXXXX` with `X`
* being a hexadecimal digit or a string holding the name of the section.
*
* @property {string} .type
* The `.type` property contains the type of the corresponding uci
* section.
*
* @property {string|string[]} *
* A section object may contain an arbitrary number of further properties
* representing the uci option enclosed in the section.
*
* All option property names will be in the form `[A-Za-z0-9_]+` and
* either contain a string value or an array of strings, in case the
* underlying option is an UCI list.
*/
/**
* The sections callback is invoked for each section found within
* the given configuration and receives the section object and its
* associated name as arguments.
*
* @callback LuCI.uci~sectionsFn
*
* @param {LuCI.uci.SectionObject} section
* The section object.
*
* @param {string} sid
* The name or ID of the section.
*/
/**
* Enumerates the sections of the given configuration, optionally
* filtered by type.
*
* @param {string} config
* The name of the configuration to enumerate the sections for.
*
* @param {string} [type]
* Enumerate only sections of the given type. If omitted, enumerate
* all sections.
*
* @param {LuCI.uci~sectionsFn} [cb]
* An optional callback to invoke for each enumerated section.
*
* @returns {Array<LuCI.uci.SectionObject>}
* Returns a sorted array of the section objects within the given
* configuration, filtered by type of a type has been specified.
*/
sections: function(conf, type, cb) {
var sa = [ ],
v = this.state.values[conf],
n = this.state.creates[conf],
c = this.state.changes[conf],
d = this.state.deletes[conf];
if (!v)
return sa;
for (var s in v)
if (!d || d[s] !== true)
if (!type || v[s]['.type'] == type)
sa.push(Object.assign({ }, v[s], c ? c[s] : undefined));
if (n)
for (var s in n)
if (!type || n[s]['.type'] == type)
sa.push(Object.assign({ }, n[s]));
sa.sort(function(a, b) {
return a['.index'] - b['.index'];
});
for (var i = 0; i < sa.length; i++)
sa[i]['.index'] = i;
if (typeof(cb) == 'function')
for (var i = 0; i < sa.length; i++)
cb.call(this, sa[i], sa[i]['.name']);
return sa;
},
/**
* Gets the value of the given option within the specified section
* of the given configuration or the entire section object if the
* option name is omitted.
*
* @param {string} config
* The name of the configuration to read the value from.
*
* @param {string} sid
* The name or ID of the section to read.
*
* @param {string} [option]
* The option name to read the value from. If the option name is
* omitted or `null`, the entire section is returned instead.
*
* @returns {null|string|string[]|LuCI.uci.SectionObject}
* - Returns a string containing the option value in case of a
* plain UCI option.
* - Returns an array of strings containing the option values in
* case of `option` pointing to an UCI list.
* - Returns a {@link LuCI.uci.SectionObject section object} if
* the `option` argument has been omitted or is `null`.
* - Returns `null` if the config, section or option has not been
* found or if the corresponding configuration is not loaded.
*/
get: function(conf, sid, opt) {
var v = this.state.values,
n = this.state.creates,
c = this.state.changes,
d = this.state.deletes;
sid = this.resolveSID(conf, sid);
if (sid == null)
return null;
/* requested option in a just created section */
if (n[conf] && n[conf][sid]) {
if (!n[conf])
return undefined;
if (opt == null)
return n[conf][sid];
return n[conf][sid][opt];
}
/* requested an option value */
if (opt != null) {
/* check whether option was deleted */
if (d[conf] && d[conf][sid]) {
if (d[conf][sid] === true)
return undefined;
for (var i = 0; i < d[conf][sid].length; i++)
if (d[conf][sid][i] == opt)
return undefined;
}
/* check whether option was changed */
if (c[conf] && c[conf][sid] && c[conf][sid][opt] != null)
return c[conf][sid][opt];
/* return base value */
if (v[conf] && v[conf][sid])
return v[conf][sid][opt];
return undefined;
}
/* requested an entire section */
if (v[conf])
return v[conf][sid];
return undefined;
},
/**
* Sets the value of the given option within the specified section
* of the given configuration.
*
* If either config, section or option is null, or if `option` begins
* with a dot, the function will do nothing.
*
* @param {string} config
* The name of the configuration to set the option value in.
*
* @param {string} sid
* The name or ID of the section to set the option value in.
*
* @param {string} option
* The option name to set the value for.
*
* @param {null|string|string[]} value
* The option value to set. If the value is `null` or an empty string,
* the option will be removed, otherwise it will be set or overwritten
* with the given value.
*/
set: function(conf, sid, opt, val) {
var v = this.state.values,
n = this.state.creates,
c = this.state.changes,
d = this.state.deletes;
sid = this.resolveSID(conf, sid);
if (sid == null || opt == null || opt.charAt(0) == '.')
return;
if (n[conf] && n[conf][sid]) {
if (val != null)
n[conf][sid][opt] = val;
else
delete n[conf][sid][opt];
}
else if (val != null && val !== '') {
/* do not set within deleted section */
if (d[conf] && d[conf][sid] === true)
return;
/* only set in existing sections */
if (!v[conf] || !v[conf][sid])
return;
if (!c[conf])
c[conf] = {};
if (!c[conf][sid])
c[conf][sid] = {};
/* undelete option */
if (d[conf] && d[conf][sid])
d[conf][sid] = d[conf][sid].filter(function(o) { return o !== opt });
c[conf][sid][opt] = val;
}
else {
/* only delete in existing sections */
if (!(v[conf] && v[conf][sid] && v[conf][sid].hasOwnProperty(opt)) &&
!(c[conf] && c[conf][sid] && c[conf][sid].hasOwnProperty(opt)))
return;
if (!d[conf])
d[conf] = { };
if (!d[conf][sid])
d[conf][sid] = [ ];
if (d[conf][sid] !== true)
d[conf][sid].push(opt);
}
},
/**
* Remove the given option within the specified section of the given
* configuration.
*
* This function is a convenience wrapper around
* `uci.set(config, section, option, null)`.
*
* @param {string} config
* The name of the configuration to remove the option from.
*
* @param {string} sid
* The name or ID of the section to remove the option from.
*
* @param {string} option
* The name of the option to remove.
*/
unset: function(conf, sid, opt) {
return this.set(conf, sid, opt, null);
},
/**
* Gets the value of the given option or the entire section object of
* the first found section of the specified type or the first found
* section of the entire configuration if no type is specfied.
*
* @param {string} config
* The name of the configuration to read the value from.
*
* @param {string} [type]
* The type of the first section to find. If it is `null`, the first
* section of the entire config is read, otherwise the first section
* matching the given type.
*
* @param {string} [option]
* The option name to read the value from. If the option name is
* omitted or `null`, the entire section is returned instead.
*
* @returns {null|string|string[]|LuCI.uci.SectionObject}
* - Returns a string containing the option value in case of a
* plain UCI option.
* - Returns an array of strings containing the option values in
* case of `option` pointing to an UCI list.
* - Returns a {@link LuCI.uci.SectionObject section object} if
* the `option` argument has been omitted or is `null`.
* - Returns `null` if the config, section or option has not been
* found or if the corresponding configuration is not loaded.
*/
get_first: function(conf, type, opt) {
var sid = null;
this.sections(conf, type, function(s) {
if (sid == null)
sid = s['.name'];
});
return this.get(conf, sid, opt);
},
/**
* Sets the value of the given option within the first found section
* of the given configuration matching the specified type or within
* the first section of the entire config when no type has is specified.
*
* If either config, type or option is null, or if `option` begins
* with a dot, the function will do nothing.
*
* @param {string} config
* The name of the configuration to set the option value in.
*
* @param {string} [type]
* The type of the first section to find. If it is `null`, the first
* section of the entire config is written to, otherwise the first
* section matching the given type is used.
*
* @param {string} option
* The option name to set the value for.
*
* @param {null|string|string[]} value
* The option value to set. If the value is `null` or an empty string,
* the option will be removed, otherwise it will be set or overwritten
* with the given value.
*/
set_first: function(conf, type, opt, val) {
var sid = null;
this.sections(conf, type, function(s) {
if (sid == null)
sid = s['.name'];
});
return this.set(conf, sid, opt, val);
},
/**
* Removes the given option within the first found section of the given
* configuration matching the specified type or within the first section
* of the entire config when no type has is specified.
*
* This function is a convenience wrapper around
* `uci.set_first(config, type, option, null)`.
*
* @param {string} config
* The name of the configuration to set the option value in.
*
* @param {string} [type]
* The type of the first section to find. If it is `null`, the first
* section of the entire config is written to, otherwise the first
* section matching the given type is used.
*
* @param {string} option
* The option name to set the value for.
*/
unset_first: function(conf, type, opt) {
return this.set_first(conf, type, opt, null);
},
/**
* Move the first specified section within the given configuration
* before or after the second specified section.
*
* @param {string} config
* The configuration to move the section within.
*
* @param {string} sid1
* The ID of the section to move within the configuration.
*
* @param {string} [sid2]
* The ID of the target section for the move operation. If the
* `after` argument is `false` or not specified, the section named by
* `sid1` will be moved before this target section, if the `after`
* argument is `true`, the `sid1` section will be moved after this
* section.
*
* When the `sid2` argument is `null`, the section specified by `sid1`
* is moved to the end of the configuration.
*
* @param {boolean} [after=false]
* When `true`, the section `sid1` is moved after the section `sid2`,
* when `false`, the section `sid1` is moved before `sid2`.
*
* If `sid2` is null, then this parameter has no effect and the section
* `sid1` is moved to the end of the configuration instead.
*
* @returns {boolean}
* Returns `true` when the section was successfully moved, or `false`
* when either the section specified by `sid1` or by `sid2` is not found.
*/
move: function(conf, sid1, sid2, after) {
var sa = this.sections(conf),
s1 = null, s2 = null;
sid1 = this.resolveSID(conf, sid1);
sid2 = this.resolveSID(conf, sid2);
for (var i = 0; i < sa.length; i++) {
if (sa[i]['.name'] != sid1)
continue;
s1 = sa[i];
sa.splice(i, 1);
break;
}
if (s1 == null)
return false;
if (sid2 == null) {
sa.push(s1);
}
else {
for (var i = 0; i < sa.length; i++) {
if (sa[i]['.name'] != sid2)
continue;
s2 = sa[i];
sa.splice(i + !!after, 0, s1);
break;
}
if (s2 == null)
return false;
}
for (var i = 0; i < sa.length; i++)
this.get(conf, sa[i]['.name'])['.index'] = i;
this.state.reorder[conf] = true;
return true;
},
/**
* Submits all local configuration changes to the remove `ubus` api,
* adds, removes and reorders remote sections as needed and reloads
* all loaded configurations to resynchronize the local state with
* the remote configuration values.
*
* @returns {string[]}
* Returns a promise resolving to an array of configuration names which
* have been reloaded by the save operation.
*/
save: function() {
var v = this.state.values,
n = this.state.creates,
c = this.state.changes,
d = this.state.deletes,
r = this.state.reorder,
self = this,
snew = [ ],
pkgs = { },
tasks = [];
if (n)
for (var conf in n) {
for (var sid in n[conf]) {
var r = {
config: conf,
values: { }
};
for (var k in n[conf][sid]) {
if (k == '.type')
r.type = n[conf][sid][k];
else if (k == '.create')
r.name = n[conf][sid][k];
else if (k.charAt(0) != '.')
r.values[k] = n[conf][sid][k];
}
snew.push(n[conf][sid]);
tasks.push(self.callAdd(r.config, r.type, r.name, r.values));
}
pkgs[conf] = true;
}
if (c)
for (var conf in c) {
for (var sid in c[conf])
tasks.push(self.callSet(conf, sid, c[conf][sid]));
pkgs[conf] = true;
}
if (d)
for (var conf in d) {
for (var sid in d[conf]) {
var o = d[conf][sid];
tasks.push(self.callDelete(conf, sid, (o === true) ? null : o));
}
pkgs[conf] = true;
}
if (r)
for (var conf in r)
pkgs[conf] = true;
return Promise.all(tasks).then(function(responses) {
/*
array "snew" holds references to the created uci sections,
use it to assign the returned names of the new sections
*/
for (var i = 0; i < snew.length; i++)
snew[i]['.name'] = responses[i];
return self.reorderSections();
}).then(function() {
pkgs = Object.keys(pkgs);
self.unload(pkgs);
return self.load(pkgs);
});
},
/**
* Instructs the remote `ubus` UCI api to commit all saved changes with
* rollback protection and attempts to confirm the pending commit
* operation to cancel the rollback timer.
*
* @param {number} [timeout=10]
* Override the confirmation timeout after which a rollback is triggered.
*
* @returns {Promise<number>}
* Returns a promise resolving/rejecting with the `ubus` RPC status code.
*/
apply: function(timeout) {
var self = this,
date = new Date();
if (typeof(timeout) != 'number' || timeout < 1)
timeout = 10;
return self.callApply(timeout, true).then(function(rv) {
if (rv != 0)
return Promise.reject(rv);
var try_deadline = date.getTime() + 1000 * timeout;
var try_confirm = function() {
return self.callConfirm().then(function(rv) {
if (rv != 0) {
if (date.getTime() < try_deadline)
window.setTimeout(try_confirm, 250);
else
return Promise.reject(rv);
}
return rv;
});
};
window.setTimeout(try_confirm, 1000);
});
},
/**
* An UCI change record is a plain array containing the change operation
* name as first element, the affected section ID as second argument
* and an optional third and fourth argument whose meanings depend on
* the operation.
*
* @typedef {string[]} ChangeRecord
* @memberof LuCI.uci
*
* @property {string} 0
* The operation name - may be one of `add`, `set`, `remove`, `order`,
* `list-add`, `list-del` or `rename`.
*
* @property {string} 1
* The section ID targeted by the operation.
*
* @property {string} 2
* The meaning of the third element depends on the operation.
* - For `add` it is type of the section that has been added
* - For `set` it either is the option name if a fourth element exists,
* or the type of a named section which has been added when the change
* entry only contains three elements.
* - For `remove` it contains the name of the option that has been
* removed.
* - For `order` it specifies the new sort index of the section.
* - For `list-add` it contains the name of the list option a new value
* has been added to.
* - For `list-del` it contains the name of the list option a value has
* been removed from.
* - For `rename` it contains the name of the option that has been
* renamed if a fourth element exists, else it contains the new name
* a section has been renamed to if the change entry only contains
* three elements.
*
* @property {string} 4
* The meaning of the fourth element depends on the operation.
* - For `set` it is the value an option has been set to.
* - For `list-add` it is the new value that has been added to a
* list option.
* - For `rename` it is the new name of an option that has been
* renamed.
*/
/**
* Fetches uncommitted UCI changes from the remote `ubus` RPC api.
*
* @method
* @returns {Promise<Object<string, Array<LuCI.uci.ChangeRecord>>>}
* Returns a promise resolving to an object containing the configuration
* names as keys and arrays of related change records as values.
*/
changes: rpc.declare({
object: 'uci',
method: 'changes',
expect: { changes: { } }
})
});
</code></pre>
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